InfiniteCalc

Every calculator
you'll ever need.

Free, instant, and accurate — calculators for money, health, math, dates, and everyday life. And when a number really matters, every tool can show you the work behind it.

100% free, forever No sign-up Formula-verified Nothing you type is stored

Most popular

The calculators people reach for every day.

Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and amortization schedule.
Calorie Calculator
Find your daily calorie needs to maintain, lose, or gain weight.
Age Calculator
Find your exact age in years, months, and days — plus a countdown to your next birthday.
BMI Calculator
Calculate your body mass index and see the healthy weight range for your height.
Percentage Calculator
Calculate percent of a number, what percent one number is of another, or percentage change.
Tip Calculator
Calculate the tip, total bill, and per-person share for any tip percentage.
GPA Calculator
Compute your GPA on the 4.0 scale from letter grades and credit hours.
Days From Today Calculator
Find the exact calendar date any number of days from today — calendar or business days.

Financial Calculators

Mortgages, loans, interest, investments, salary, taxes, and every other money question — calculated instantly and accurately.

Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and amortization schedule.
Auto Loan Calculator
Estimate your monthly car payment, total interest, and the true total cost of a vehicle.
Loan Calculator
Calculate the monthly payment, total interest, and payoff schedule for any loan.
Amortization Calculator
Generate a full amortization schedule showing principal, interest, and balance year by year.
Investment Calculator
Project how a starting balance plus monthly contributions grows at a given annual return.
Compound Interest Calculator
See how principal grows with daily, monthly, quarterly, or annual compounding, plus optional deposits.
Interest Calculator
Calculate simple or compound interest on any principal, rate, and time period.
Salary Calculator
Convert between hourly wages and annual salary, with daily, weekly, and monthly equivalents.
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Health & Fitness Calculators

Calories, BMI, body fat, macros, pregnancy, and fitness calculators built on established medical formulas.

Calorie Calculator
Find your daily calorie needs to maintain, lose, or gain weight.
BMI Calculator
Calculate your body mass index and see the healthy weight range for your height.
Body Fat Calculator
Estimate your body fat percentage from tape measurements using the U.S. Navy method.
BMR Calculator
Estimate the calories your body burns at rest and at each activity level.
TDEE Calculator
Find your total daily energy expenditure and maintenance calories.
Macro Calculator
Get daily protein, carb, and fat targets in grams for your goal.
Ideal Weight Calculator
Find your ideal body weight from four medical formulas and the healthy BMI range.
Calories Burned Calculator
Estimate calories burned for 10 common activities using MET values, weight, and duration.
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Math Calculators

Percentages, fractions, geometry, algebra, and statistics — step-by-step math calculators for school and work.

Percentage Calculator
Calculate percent of a number, what percent one number is of another, or percentage change.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and get a simplified answer with decimal.
Ratio Calculator
Solve A:B = C:D for the missing value and simplify any ratio to lowest terms.
Proportion Calculator
Enter three of the four values in a/b = c/d and solve the missing one by cross multiplication.
Average Calculator
Find the mean, median, mode, sum, and range of any list of numbers instantly.
Standard Deviation Calculator
Compute sample or population standard deviation, variance, and mean from a list of numbers.
Slope Calculator
Find the slope, line equation, and angle of incline from two points.
Pythagorean Theorem Calculator
Solve a² + b² = c² for the hypotenuse or a missing leg of a right triangle.
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Date & Time Calculators

Age, date differences, durations, work hours, and countdowns — every date and time calculation in one place.

Age Calculator
Find your exact age in years, months, and days — plus a countdown to your next birthday.
Date Calculator
Find the difference between two dates, or add and subtract days, weeks, months, or years.
Days From Today Calculator
Find the exact calendar date any number of days from today — calendar or business days.
Time Calculator
Add or subtract two times in hours, minutes, and seconds — with decimal conversions.
Time Duration Calculator
Find the exact hours and minutes between a start and end time — overnight shifts included.
Hours Calculator
Count hours worked between clock-in and clock-out, minus breaks — with optional pay.
Time Card Calculator
Total a weekly timesheet from daily in/out times, with breaks, overtime, and gross pay.
Day Counter
Count the days between two dates — total days, weekdays, weekends, and weeks.
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Unit Converters

Length, weight, temperature, volume, and cooking conversions between metric and imperial units.

Unit Converter
Convert between metric and imperial units of length, weight, temperature, volume, area, and speed.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Weight Converter
Convert between milligrams, grams, kilograms, metric tons, ounces, pounds, and stones.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with the exact formulas shown.
Cooking Converter
Convert US kitchen measures — teaspoons, tablespoons, cups, fluid ounces, pints, quarts, gallons, and milliliters.
Height Converter
Convert height between centimeters and feet & inches, with results in every format.
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Construction Calculators

Gravel, concrete, asphalt, lumber, drywall, stairs, and roofing — material and project calculators for builders and DIYers.

Gravel Calculator
Find how much gravel you need in cubic yards and tons for any length, width, and depth.
Cubic Yard Calculator
Convert length, width, and depth into cubic yards for concrete, mulch, gravel, or soil.
Cubic Feet Calculator
Get the volume of any box shape in cubic feet, cubic yards, cubic meters, liters, and gallons.
Asphalt Calculator
Convert driveway dimensions into tons of hot-mix asphalt, cubic yards, and estimated cost.
Board Foot Calculator
Calculate board feet and total lumber cost from thickness, width, length, and quantity.
Stair Calculator
Turn a total rise into risers, treads, exact riser height, total run, and stringer length.
Roof Pitch Calculator
Convert rise and run to roof pitch, or any x/12 pitch to degrees, slope %, and rafter length.
Drywall Calculator
Estimate drywall sheets, joint compound, tape, and screws for any room from its dimensions.
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Everyday Calculators

GPA, grades, random numbers, passwords, tips, and other practical tools for daily life.

GPA Calculator
Compute your GPA on the 4.0 scale from letter grades and credit hours.
Grade Calculator
Find your weighted course grade and the score you need on the final exam.
Tip Calculator
Calculate the tip, total bill, and per-person share for any tip percentage.
Fuel Cost Calculator
Estimate the gas cost of any trip from distance, MPG, and fuel price.
Square Footage Calculator
Find the square footage of any room or area, with unit conversions and cost.
Love Calculator
Enter two names and get a playful love compatibility percentage.
Random Number Generator
Generate random numbers in any range — for raffles, games, and sampling.
Dice Roller
Roll virtual dice from d4 to d100 — single dice or full handfuls with totals.
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Free online calculators for every question with a number in it

InfiniteCalc is a free collection of 93+ online calculators covering the questions people actually search for: what a mortgage payment really costs, how many calories to eat per day, what your GPA works out to, how much gravel a project needs, and hundreds more. Every tool runs instantly in your browser, works on any device, and never asks you to sign up.

What makes these calculators different is that each one shows its work: the formula it uses, a worked example with real numbers, charts that break the answer down, and direct answers to the questions people ask most. New calculators are added every week — if there's one you need that we don't have, it's probably already on our list.

Why InfiniteCalc?

Answers you can trust

Every calculator uses the established formula for its field — the same math lenders, dietitians, and engineers use — and shows you that formula, worked through with real numbers.

Understand, don’t just copy

Charts, breakdown tables, and plain-English explanations show you how the answer was reached, so you can sanity-check it and make a better decision.

Fast and private

Everything runs instantly in your browser. No accounts, no popups, and nothing you type ever leaves your device.