Online
Calculators

Online Calculator

Evaluate an arithmetic expression with the online calculator.

Percentage Calculator

Find a percentage, change, or share of a total.

Discount Calculator

Calculate the price after a discount and the amount saved.

Rounding Calculator

Round a number to the place and method you choose.

Square Root Calculator

Find the principal square root of a nonnegative number.

Fractions Calculator

Add, subtract, multiply, divide, or simplify fractions.

GCF Calculator

Find the greatest common factor of several integers.

LCM Calculator

Find the least common multiple of several integers.

Circle Calculator

Find a circle’s radius, diameter, circumference, and area.

Triangle Area Calculator

Calculate a triangle’s area from the measurements you know.

Word Counter

Count words, characters, lines, sentences, and paragraphs in the text you enter.

Character Counter

Count all characters or exclude spaces, and see word and line totals.

Password Generator

Generate a random password on your device. Choose its length and character set; copy it when ready.

QR Code Generator

Create a static QR code for text, a URL, or Wi-Fi credentials. Download it as PNG or SVG and test it before use.

QR Code Scanner

Scan a QR code from an image or your camera. Decoding runs in your browser; check any link before opening it.

JSON Formatter

Format, minify, or validate JSON. Optional key sorting changes key order but preserves JSON value types.

XML Formatter

Format, minify, or validate XML. Network access, DTDs, and external entities remain disabled.

Unix Timestamp Converter

Convert Unix seconds or milliseconds to a date, or a date to a timestamp in the selected time zone.

UUID Generator

Generate one or more cryptographically secure UUID version 4 values in the selected format.

Lorem Ipsum Generator

Generate bounded placeholder text by words, sentences, or paragraphs.

Uppercase Lowercase Converter

Convert text to upper, lower, sentence, title, camel, Pascal, snake, or kebab case.

Random Number Generator

Draw integers within inclusive bounds, with optional repeats and sorting.

Color Palette Generator

Build a complementary, analogous, or monochrome palette. Optional image extraction stays in your browser.

Image Resizer

Resize a local image in your browser. Choose dimensions, format, quality, and aspect-ratio behavior.

Subnet Calculator

Enter an IPv4 address and CIDR prefix to calculate network, broadcast, usable ranges, and mask.

Cylinder Volume Calculator

Calculate cylinder volume from radius or diameter and height, using consistent length units.

Scientific Notation Calculator

Convert between decimal and scientific notation with a selected significant-digit limit.

Slope Calculator

Find slope from two points, a point and slope, slope-intercept form, or standard form. A vertical line has no finite slope.

Graphing Calculator

Plot up to five expressions in x, inspect sample values, and zoom. Supported functions include sin, cos, tan, inverse trig, sqrt, abs, exp, ln, and log.

Median Calculator

Find the median, mean, quartiles, range, and an optional percentile. Choose the quantile convention.

Standard Deviation Calculator

Calculate population or sample variance and standard deviation from entered values.

Combination Calculator

Calculate factorials, permutations, combinations, combinations with repetition, and multiset permutations.

Z Score Calculator

Calculate density, tail or interval probability, a quantile, or a Z score for a normal distribution.

Compound Interest Calculator

Enter APR or APY, compounding frequency, starting principal, and optional end-of-period contributions.

Cost Of Living Calculator

Compare your own monthly household budgets for two places in one currency. No city price database is used.

CPM Calculator

Calculate CPM, CPC, CTR, conversion rate, ROAS, ROI, and acquisition costs from your campaign figures.

Dog Age Calculator

Estimate a dog’s human-age equivalent from its age and adult size. This is general guidance, not veterinary advice.

Molarity Calculator

Calculate molar or mass concentration, solute mass, amount, volume, conversion, mass fraction, or mass ppm.

Chemical Equation Balancer

Balance a molecular equation and optionally estimate a limiting reactant and theoretical yield from entered amounts.

Remainder Calculator

Divide two integers to find the integer quotient and nonnegative remainder.

Quadratic Equation Calculator

Solve a quadratic equation using its discriminant and real roots.

Exponent Calculator

Raise a base to an exponent and inspect the result.

Logarithm Calculator

Calculate base 10, base 2, natural, or custom-base logarithms.

Distance Formula Calculator

Find the 2D distance between two points and their midpoint.

Pythagorean Theorem Calculator

Find one missing side of a right triangle from the other two sides.

Sphere Volume Calculator

Calculate sphere volume from a radius or diameter, or use the inverse volume mode.

Cube Volume Calculator

Find the volume, surface area, and diagonal of a cube or rectangular prism.

Cylinder Surface Area Calculator

Calculate the lateral and total surface area of a cylinder.

Sphere Surface Area Calculator

Calculate sphere surface area, including an inverse area mode.

Cone Volume Calculator

Find cone volume from radius or diameter and height.

Rectangle Area Calculator

Find rectangle area, perimeter, and diagonal from the measurements you know.

Square Area Calculator

Find square area, perimeter, and diagonal from one known measurement.

Probability Calculator

Calculate complement, union, independent intersection, conditional, total, or Bayes probabilities.

Binomial Probability Calculator

Calculate binomial probabilities, cumulative tails, intervals, or quantiles.

Confidence Interval Calculator

Calculate Z mean, Student t mean, or Wilson proportion intervals with the selected confidence level.

Sample Size Calculator

Estimate sample size for a mean or proportion from confidence level, margin of error, and optional population size.

Correlation Calculator

Calculate Pearson correlation, population and sample covariance, and a fitted slope.

Poisson Distribution Calculator

Calculate Poisson, exponential, or continuous uniform probabilities using the available modes.

Password Strength Checker

Check a password locally in your browser using length and simple pattern checks. No password is sent to the server.

Base64 Encoder Decoder

Encode or decode standard or URL-safe Base64 text.

URL Encoder Decoder

Encode or decode URL text or analyze a full URL.

JSON To XML Converter

Convert between JSON and XML using the existing bounded, protected parser.

JSON To Yaml Converter

Convert between JSON and supported simple YAML without tags or aliases.

Csv To JSON Converter

Convert CSV and JSON with a comma, semicolon, or tab delimiter.

Regex Tester

Test a bounded regular expression against text with optional case and multiline flags.

HTML Formatter

Format, minify, encode, or decode HTML as escaped text.

Hash Generator

Generate a digest from text; optionally verify an expected digest or hash a local file with SHA-256.

Random String Generator

Generate random strings with a chosen length, count, character set, prefix, and suffix.

Text Compare Tool

Compare two texts line by line with optional case or whitespace normalization.

Color Converter

Convert a color between HEX, RGBA, and HSLA.

CSS Gradient Generator

Generate a validated linear or radial CSS gradient with optional color stops.

Jpg To Png Converter

Convert a local JPG, PNG, or WebP image in your browser to PNG, JPG, or WebP.

Image Size Calculator

Calculate print dimensions, pixel dimensions, aspect ratio, or a missing image dimension.

Download Time Calculator

Estimate theoretical download time from file size, nominal speed, and efficiency.

Bandwidth Calculator

Convert between speed, data volume, and time, including several continuous streams.

Annuity Future Value Calculator

Find the present or future value of one principal or a stream of payments, with payments at the beginning or end of each period.

NPV Calculator

Discount up to 120 periodic cash flows to calculate net present value and search for possible internal rates of return.

Dividend Yield Calculator

Calculate annual dividend income, current yield, yield on purchase price, and an illustrative dividend projection.

Rent Prorate Calculator

Prorate monthly rent for a move-in or move-out date using actual calendar days or a selected 30-day convention.

Cat Age Calculator

Estimate a cat’s human-age equivalent and life stage from AAHA reference ages. The result is indicative.

Dog Pregnancy Calculator

Estimate a dog’s whelping window from a breeding date or a veterinary-determined ovulation date.

Cat Pregnancy Calculator

Estimate a cat’s kittening window from a mating date; this cannot diagnose pregnancy.

Aquarium Calculator

Calculate gross and estimated net aquarium volume, water-change amount, and optional flow or heating values from your own assumptions.

Density Calculator

Calculate mass density, mass, volume, or relative density with explicit units and a selectable reference density.

Molar Mass Calculator

Calculate molar mass from a chemical formula, then convert between mass, moles, entities, or ideal gas volume.

Dilution Calculator

Solve C1 × V1 = C2 × V2 for one unknown, and calculate the theoretical dilution factor and volume difference.

pH Calculator

Estimate pH from H⁺ activity, ideal dilute concentrations, pOH, or an ideal buffer model, with each assumption stated.

Lunar Calendar Calculator

Find the Moon phase for a date and view the official principal phase calendar in UTC or Paris time from 2020 through 2040.

Light Year Converter

Convert between light-years, parsecs, astronomical units, metric distances, and light-time units, with theoretical travel times.

Telescope Calculator

Calculate magnification, focal ratio, exit pupil, field of view, and optional sensor geometry from telescope specifications.

Tap Tempo Calculator

Tap a beat or enter a BPM to calculate pulse, note, and bar durations. Set the pulse unit explicitly for meters such as 6/8; timing is metrical, without swing or tempo changes.

BPM Delay Calculator

Calculate independent left and right delay times, pre-delay, repeats, and a chosen musical reverb-tail duration from BPM. The tail is a musical timing guide, not a measured room RT60.

Music Transposition Calculator

Convert an equal-tempered note to frequency, identify the closest note to a frequency, or transpose a supported note or chord symbol. A4 defaults to 440 Hz and may be changed.

Decibel Calculator

Calculate sound speed and wavelength, rectangular-room modes, theoretical Sabine RT60, and unweighted sound-pressure levels. These results are estimates, not instrument measurements.

Unit Price Calculator

Compare prices per kilogram or liter using the prices and package quantities you enter. Mass and volume are compared separately.

Electricity Cost Calculator

Estimate electricity use and cost from device wattage, hours of use, number of devices, and your own price per kWh. No rate is fetched automatically.

Electric Heater Cost Calculator

Estimate electric heater use and cost from rated power, run time, duty cycle, and your own price per kWh. The result is a scenario, not a bill forecast.

Monthly Expenses Calculator

Add your monthly household income and expenses in U.S. dollars. Annual subscriptions are divided by twelve.

50 30 20 Budget Calculator

Use the 50/30/20 split as an optional planning guide for needs, wants, and savings or debt repayment. It is not a required budget rule.

Food Budget Calculator

Divide the food budget you enter across days, weeks, people, and meals. This tool contains no national recommended food budget.

Rent Vs Buy Calculator

Compare buying and renting using your own purchase price, rent, loan terms, ownership costs, growth rates, and sale assumptions. No local tax or closing cost is supplied automatically.

Shrinkflation Calculator

Compare two package sizes and prices for the same product to see how the price per unit has changed.

Price History Calculator

Compare up to twelve dated prices and package quantities that you enter yourself. This tool does not fetch product prices or store a price history.

Remote Work Savings Calculator

Estimate remote work savings from your actual avoided commute and meal costs, added home costs, and any allowance you enter. No tax schedule is applied.

Recipe Cost Calculator

Estimate recipe cost from the ingredient quantities, package sizes, and prices you enter. No food price database is used.

Cooked Rice Calculator

Estimate a dry-rice serving for a group or convert between dry and cooked rice by weight. Cooking yields vary with rice and method.

Butter To Oil Conversion

Estimate a butter-to-oil or oil-to-butter substitution by mass, with an indicative oil volume. The rule is approximate and does not reproduce butter’s texture.

Pasta Serving Calculator

Estimate dry or fresh pasta servings and convert between uncooked and cooked weights. The yield is a cooking estimate.

Oven Temperature Converter

Convert between Celsius and Fahrenheit or use the French oven-thermostat convention. The French thermostat is different from UK Gas Mark.

Serving Size Calculator

Multiply your chosen quantity per person by the number of servings. This is a cooking estimate, not personalized nutrition advice.

Ohms Law Calculator

Calculate voltage, current, or resistance from the other two values and show the associated electrical power.

Electrical Power Calculator

Calculate active power, voltage, or current in DC, single-phase, or balanced three-phase systems using your chosen power factor.

Series Parallel Resistor Calculator

Calculate the equivalent resistance of 2 to 20 resistors in series or parallel on one page.

Watt Hour Calculator

Calculate energy in Wh and kWh from power and time, convert energy units, or estimate battery capacity and runtime from entered values.

Speed Distance Time Calculator

Calculate average speed, distance, or time using the available metric units: m, km, m/s, km/h, seconds, minutes, and hours.

Kinetic Energy Calculator

Calculate kinetic, potential, or combined mechanical energy in joules using mass, speed, height, and the entered gravity.

Lean Body Mass Calculator

Calculate lean body mass from an entered body-fat estimate, alongside FFMI and waist ratios. The Deurenberg figure is a separate population estimate, not a measurement.

Glucose Converter

Convert glucose, cholesterol, or triglyceride values among mg/dL, mmol/L, and g/L using the selected substance’s existing conversion constant. No clinical interpretation is provided.

Pack Years Calculator

Add one or more smoking periods to calculate cumulative pack-years from cigarettes per day and years. This is arithmetic exposure, not a risk score.

Marathon Pace Calculator

Calculate pace, average speed, projected race time, and checkpoint times for a 42.195 km marathon with even or varied half-race pacing.

Heart Rate Zone Calculator

Compare heart-rate zones from percentages of maximum heart rate and the Karvonen heart-rate-reserve method. These are estimates, not a personalized exercise prescription.

Vo2 Max Calculator

Estimate VO₂ max indirectly using the Cooper 12-minute run or Rockport 1-mile walk protocol. The result is not a laboratory measurement.

What Week Is It

Find the ISO 8601 week number of an explicitly chosen date. ISO weeks begin on Monday, and their year can differ from the calendar year around New Year.

Days Until Calculator

Count days until a target from the local starting date you enter, or compare any two entered calendar dates. Past targets show a negative Days Until value.

Age Calculator

Calculate completed years, additional months, days, and total days from a birth date to the reference date you choose.

Time Duration Calculator

Find the duration between two times, including a crossing of midnight, or add up to 31 time spans with optional breaks.

Cm To Inches Calculator

Convert centimeters to inches or inches to centimeters on one page. One inch is exactly 2.54 cm.

kg To lb Calculator

Convert kilograms to pounds or pounds to kilograms. One pound (lb) is exactly 0.45359237 kg.

Celsius To Fahrenheit Calculator

Convert Celsius to Fahrenheit or Fahrenheit to Celsius, using the exact scale relationship.

Number To Words Converter

Spell numbers up to 999,999,999,999.99 in US English. Whole numbers omit “and”; decimal digits are read individually after “point”.

mL To cL Converter

Convert milliliters (mL) to centiliters (cL) or back. One cL is exactly 10 mL.

Km To Miles Calculator

Convert kilometers to international statute miles or miles to kilometers. One mile is exactly 1.609344 km.

Meters To Feet Calculator

Convert meters to international feet or feet to meters. One foot is exactly 0.3048 m.

Gallons To Liters Calculator

Convert US liquid gallons to liters or back. You can also select the distinct imperial gallon.

Square Meters To Square Feet Calculator

Convert square meters to square feet or square feet to square meters. One square foot is exactly 0.09290304 m².

Date Calculator

Add or subtract a whole number of calendar days. The result displays an English date and weekday.

mL To Grams Calculator

Convert mL to grams or grams to mL using the selected ingredient’s density. Ingredient densities other than the water convention are approximate.

Grams To Cups Calculator

Convert grams to cups or cups to grams using the selected ingredient’s approximate density. The US cup is selected by default; a metric cup is also available.

Race Time Predictor

Predict race time or calculate pace and speed from a distance and elapsed time. Enter a race distance in miles or kilometers; pace and speed input modes retain their explicitly labeled metric units.

Half Marathon Pace Calculator

Calculate pace, projected finish time, and checkpoints for the official 21.0975 km half marathon. This is approximately 13.1094 miles; “13.1 miles” is a rounded description.

Steps To Miles Calculator

Convert steps to miles and kilometers using a measured stride length or a known-distance calibration. Optional calories are a walking MET estimate, not a clinical measurement.

Bike Size Calculator

Find an indicative adult bike-frame size from height, inseam, and bike type. Manufacturer charts are model-specific; a suggested size does not guarantee fit.

One Rep Max Calculator

Compare Epley and Brzycki one-rep-max estimates from a weight in pounds or kilograms and 1–12 repetitions. The estimates are not recommended loads to lift.

Square Footage Calculator

Multiply rectangular length by width to estimate square footage. Enter feet, inches, or meters; the result also shows square meters. This geometric calculation does not use any legal floor-area definition.

Topsoil Calculator

Estimate topsoil for a bed or planter from its shape and depth. View cubic feet, cubic yards, and metric volume. Add your own bag volume to estimate how many bags to buy.

Latitude Longitude Converter

Convert WGS 84 latitude and longitude to UTM and back. Lambert-93 is a secondary France-specific approximation, not a U.S. coordinate system.

GPS Distance Calculator

Calculate surface geodesic distance, bearings, and a midpoint between GPS coordinates using the WGS 84 ellipsoid. Miles and kilometers are both shown; this is not route distance.

Map Scale Calculator

Calculate real-world distance, map distance, or a 1:N scale after converting the selected units. The existing engine also supports resize and print-size calculations.

Mortgage Calculator

Estimate fixed-rate mortgage principal and interest from a loan amount, annual nominal rate, and term. Optional loan insurance and upfront fees are entered by you. The calculator does not model the home purchase price, down payment, property taxes, homeowner’s insurance, PMI, or closing costs.

Loan Calculator

Estimate a fixed-rate amortizing loan payment, total interest, and total paid from the amount, annual nominal rate, and term you enter. Optional loan insurance and fees are included only if entered.

Fuel Consumption Calculator

Calculate fuel consumption from distance and actual fuel used, or convert directly between L/100 km and MPG US. The gallon on this page is always the US liquid gallon.

Concrete Calculator

Estimate slab, rectangular, or cylindrical concrete volume from dimensions in feet and inches. View cubic feet and cubic yards; a bag count needs the actual mixed yield printed on your product.

Gravel Calculator

Estimate gravel or sand volume from a rectangular or circular area and depth. Weight depends on the density used; a material-specific reference is only indicative until replaced by your supplier data.

Roof Pitch Calculator

Convert roof rise and run, angle, and slope percentage with simple geometry. There is no separate US x:12 pitch field; enter the rise and horizontal run directly. This tool does not check a roof against structural or roofing requirements.

Voltage Drop Calculator

Estimate voltage drop for an entered one-way conductor run. Select AWG or mm² as an input to the same calculation. This page does not choose a wire size or certify electrical-code compliance.

Auto Loan Calculator

Estimate an auto-loan payment from vehicle price, down payment, trade-in value, entered financed fees, rate, term, optional loan insurance, and optional final balloon payment. No tax or current lending rate is filled in automatically.

Personal Loan Calculator

Estimate monthly payments, interest, and total payment for a fixed-rate personal loan. Enter your own fees and loan insurance, and optionally enter a second offer for a manual comparison.

Paint Calculator

Estimate paint from net area, coats, and the coverage value on your paint label. Enter feet or square feet and read the result in US liquid gallons.

Stair Calculator

Explore whole-step stair geometries within the riser and tread ranges you enter. The displayed selection uses only those ranges. This geometric tool does not check building code requirements.

Pool Volume Calculator

Find geometric volume for a rectangle, circle, ellipse, or a user-defined freeform factor. Results include US liquid gallons; filling time uses your stated flow rate.

BMI Calculator

Calculate adult BMI from weight and height. The optional pound and foot/inch inputs are converted to the same metric calculation. The displayed BMI-derived weight bounds are population reference values, not personal targets.

Child BMI Calculator

Calculate a child’s BMI from weight and height, then compare it with the WHO 2007 BMI-for-age reference for the selected sex and age in completed months. The comparison uses separate girls’ and boys’ tables and is informational, not a diagnosis.

Ideal Weight Calculator

Compare the weights corresponding to the adult BMI reference bounds with the existing historical Lorenz formula. These are arithmetic reference estimates; the calculator does not determine an individually or medically ideal weight.

Bmr Calculator

Estimate resting energy expenditure with the existing Mifflin–St Jeor equation. Enter weight and height in metric or U.S. customary units; both paths use the same equation after conversion.

Calorie Calculator

Estimate total daily energy expenditure (TDEE) by multiplying the existing Mifflin–St Jeor resting estimate by the selected activity factor. The fixed categories are coarse estimates, not direct measurements.

Calorie Deficit Calculator

Compare an entered TDEE with entered calorie intake, and calculate a separate scenario from an entered deficit. These are mathematical differences; no weight-change forecast or dietary recommendation is calculated.

Macro Calculator

Convert a calorie amount into grams of protein, carbohydrates, and fat using the percentages you choose. The three percentages must add to 100%; the calculator does not choose a diet or a personal target.

Protein Calculator

Multiply your body weight by a coefficient you enter in grams per kilogram per day. Pounds and kilograms use the same underlying calculation. The coefficient is your scenario input, not a protein recommendation selected for you.

Sleep Calculator

Calculate a time window from bedtime to wake time after subtracting the assumed time to fall asleep. You can compare this window with an assumed cycle length and count, but this does not observe real sleep or determine sleep quality.

Calories Burned Calculator

Estimate gross energy use from body weight, duration, and one of five activities at three intensities. The local 2024 Adult Compendium MET values are population averages for ages 19–59; the result is not a direct measurement or an estimate of weight change.

Savings Calculator

Project a future savings balance from starting money, end-of-month contributions, an assumed effective annual interest rate, and duration. Goal mode solves for a monthly contribution. Enter your own rate; the calculator has no live savings rate.

Electricity Rate Calculator

Compare a single electricity rate against peak and off-peak rates using your own annual kWh, rate prices, allocation, and annual fixed charges. No utility schedule or regional rate is assumed.

Electricity Bill Calculator

Estimate average monthly and annual electricity costs from your entered kWh, rate structure, and fixed charge. Optional percentage changes make a second scenario. It does not reproduce a utility bill or add local taxes.

Rent Increase Calculator

Apply the percentage change you enter to the current monthly rent. This is arithmetic only; check the rules that apply where the property is located.

Car Ownership Cost Calculator

Estimate car ownership cost from your purchase price, estimated resale value, distance, energy use, and annual costs. Resale value is your scenario; depreciation is spread evenly over the selected holding period.

Gas Vs Electric Car Calculator

Compare a gas car and an electric car for the same holding period and annual distance using purchase and resale amounts, energy use, rates, insurance, and maintenance you enter. No incentive or market price is supplied.

Weighted Grade Calculator

Combine two to twenty assessment scores using their points possible and relative weights. Each score is converted to a percentage before weighting. Weights can be any positive relative values; they do not need to add up to 100.

Grade Calculator

Turn one points-earned score into a percentage grade. You may convert that same individual score to another numeric base. This page does not combine assessments, assign letter grades, or calculate GPA.

ROI Calculator

Calculate simple return on investment from entered initial and final values, additional income, and costs. CAGR is a separate mode that annualizes only the change from initial to final value over the entered years; it excludes additional income and costs. Neither mode retrieves returns or recommends an investment.

Rental Yield Calculator

Compare gross rental yield, net yield before income tax, and cash flow using your property cost, rent, vacancy, annual expenses, property tax, and financing amounts. Every cost is entered by you; the result is a scenario, not a guaranteed future return.

Profit Margin Calculator

Calculate gross profit from unit selling price minus unit cost, then compare profit margin on selling price with markup on cost. The two percentages have different denominators. This simple gross margin omits other overhead and does not estimate net profit or sales tax.

Break Even Calculator

In units mode, divide fixed costs by the contribution per unit. In annual revenue mode, divide fixed costs by the entered contribution margin ratio and compare the result with a chosen number of reference days. Costs and prices are your inputs, not industry assumptions.

Working Capital Calculator

Working Capital = Current Assets − Current Liabilities. Enter both amounts; the result may be positive, zero, or negative. It is an arithmetic measure, not a diagnosis of financial health.

Ebitda Calculator

Calculate EBITDA directly from net income or loss plus net interest expense, income tax expense or benefit, depreciation, and amortization for the same accounting period. Enter net interest income or an income tax benefit as a negative amount. This English mode does not use the separate French operating-surplus formula. The arithmetic does not verify the accounting classification of your entries.

Trip Fuel Calculator

Estimate fuel volume and trip cost from miles, MPG US, and the fuel price you enter.

kW To HP Calculator

Convert kilowatts and mechanical horsepower using the documented US hp factor.

Tile Calculator

Estimate whole tiles and packages from your area, tile size, joints, and waste allowance.

Wallpaper Calculator

Estimate wallpaper strips and rolls from your walls, roll dimensions, and pattern repeat.

Brick Calculator

Estimate bricks from entered wall, brick, and mortar-joint dimensions.

Flooring Calculator

Estimate flooring area, pieces, and whole packages using the coverage you enter.

Fence Calculator

Estimate fence length, panels or bays, and posts using your chosen spacing.

Mortar Calculator

Estimate mortar volume from area and thickness; enter product yield to estimate bags.

Drywall Calculator

Estimate whole drywall sheets from your wall and sheet dimensions.

Insulation R Value Calculator

Calculate insulation R-value or convert between US R-value and SI RSI.

Deck Calculator

Estimate deck boards and framing counts from dimensions and spacing you enter.

Dog Food Calculator

Estimate healthy adult dog energy and food amounts using your food label density. This is not a diagnosis or therapeutic feeding plan.

Cat Calorie Calculator

Estimate healthy adult cat energy and food amounts using your food label density. This is not a diagnosis or therapeutic feeding plan.

Inflation Calculator

Compare U.S. dollar purchasing power between two years using published BLS annual CPI-U averages.

Salary Inflation Calculator

Compare a monthly salary with CPI-U inflation and calculate its change in start-year dollars.

Pension Inflation Calculator

Compare a monthly pension with CPI-U inflation and calculate its change in start-year dollars.

Recipe Nutrition Calculator

Add nutrients for the listed USDA Foundation Foods by their exact FDC IDs and entered masses.

Personal Emissions Calculator

Estimate CO2 from electricity generation and gasoline combustion for the amounts you enter.

Transport Carbon Calculator

Estimate direct gasoline or diesel combustion CO2 from your fuel amount or distance and MPG US.

Water Consumption Calculator

Estimate shower or toilet water volume from your entered flow or flush volume and activity counts.

Sales Tax Calculator

Add or remove sales tax using the price and rate you enter. No location-based rate is retrieved.

PTO Accrual Calculator

Estimate PTO hours accrued and remaining using the accrual rule and balance you enter.

Severance Pay Calculator

Estimate gross severance using the weekly pay and weeks or user-entered years-of-service factor.

Working Days Calculator