Free online calculators for money, health & math.
86 calculators and converters in one place. No sign-up, nothing to install.
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Finance
Numbers you can count on.24 calculators
Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and payoff timeline.
Loan Calculator
Calculate the monthly payment and total interest on any fixed-rate loan.
Compound Interest Calculator
See how a deposit grows over time as interest compounds at any frequency.
Simple Interest Calculator
Calculate flat-rate interest on a principal amount over time.
Tip Calculator
Calculate the tip on a bill and split the total between any number of people.
Sales Tax Calculator
Add sales tax to a price to find the total you'll pay.
Discount Calculator
Find the sale price and savings after a percentage discount.
Auto Loan Calculator
Calculate your monthly car payment from vehicle price, trade-in, down payment, and sales tax.
Down Payment Calculator
Find the down payment amount and resulting loan amount for any purchase price.
Future Value Calculator
See what a lump sum plus monthly contributions grows to at any rate of return.
VAT Calculator
Add or remove VAT from a price at any tax rate.
Debt Payoff Calculator
Find out how long a fixed monthly payment takes to pay off a balance.
Amortization Calculator
See the full year-by-year principal and interest breakdown for any fixed-rate loan.
Interest Rate Calculator
Find the annual growth rate that turned a starting amount into an ending amount.
Payback Period Calculator
Find out how long an investment takes to pay back its initial cost from its cash flows.
Commission Calculator
Calculate commission earned from a sale amount and commission rate.
Salary Calculator
Turn gross pay into net pay after tax in every Canadian province, by year, month, week, day or hour.
Present Value Calculator
Find what a future amount of money is worth today at a given discount rate.
Rent Calculator
Estimate how much rent you can afford based on your income.
Budget Calculator
Split your monthly income using the 50/30/20 budgeting rule.
Inflation Calculator
See what today's money will be worth after years of inflation.
Margin Calculator
Calculate gross margin and markup from cost and selling price.
Depreciation Calculator
Calculate straight-line depreciation for an asset over its useful life.
Savings Calculator
Find the monthly savings needed to reach a future goal.
Health
Take care of yourself.8 calculators
BMI Calculator
Calculate your Body Mass Index and see which weight category you fall into.
Calorie Calculator
Estimate your daily calorie needs based on age, sex, height, weight, and activity.
Body Fat Calculator
Estimate body fat percentage from body measurements using the US Navy method.
BMR Calculator
Calculate your basal metabolic rate — the calories your body burns at rest.
Ideal Weight Calculator
Estimate a healthy target body weight from height and gender.
Due Date Calculator
Estimate a pregnancy due date from the first day of the last menstrual period or a conception date.
Target Heart Rate Calculator
Find your target heart rate zones for exercise based on your age.
Body Surface Area Calculator
Estimate body surface area from height and weight using the Mosteller formula.
Math
Precision, above all.28 calculators
Basic Calculator
A full-screen calculator for everyday addition, subtraction, multiplication, and division.
Percentage Calculator
Find percentages, work out percentage change, or solve for the missing number.
Fraction Calculator
Add, subtract, multiply, or divide fractions with automatic simplification.
Exponent Calculator
Raise any base to any exponent, including negative and fractional powers.
Root Calculator
Find the square root, cube root, or any nth root of a number.
Ratio Calculator
Simplify a ratio between two numbers to its lowest terms.
LCM Calculator
Find the least common multiple of two or more numbers.
GCF Calculator
Find the greatest common factor of two or more numbers.
Long Division Calculator
Divide two numbers and get the quotient, remainder, and decimal result.
Rounding Calculator
Round a number to any decimal place or whole-number magnitude.
Mean, Median, Mode & Range Calculator
Calculate the mean, median, mode, and range of a list of numbers.
GPA Calculator
Calculate your weighted GPA on a 4.0 scale from grades and credit hours.
Standard Deviation Calculator
Calculate the standard deviation, variance, and mean of a list of numbers.
Slope Calculator
Find the slope, distance, and midpoint between two points.
Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 for its roots.
Log Calculator
Calculate the logarithm of a number at any base.
Triangle Calculator
Solve a triangle's remaining sides, angles, and area from three known values.
Permutation and Combination Calculator
Calculate the number of ways to arrange or choose items from a set.
Probability Calculator
Calculate the probability of two events, combined with AND/OR logic.
Percent Error Calculator
Calculate the percent error between a measured and an accepted value.
Pythagorean Theorem Calculator
Find the hypotenuse, area, and perimeter of a right triangle.
Circle Calculator
Find a circle's area, circumference, and diameter from its radius.
Z-Score Calculator
Calculate a z-score and percentile from a value, mean, and standard deviation.
Half-Life Calculator
Calculate the remaining amount of a substance after radioactive or exponential decay.
Binary Calculator
Convert numbers between decimal and binary in either direction.
Hex Calculator
Convert numbers between decimal and hexadecimal in either direction.
Molarity Calculator
Calculate the molarity of a solution from solute mass, molar mass, and volume.
Matrix Calculator
Add, subtract, multiply, transpose, and find the determinant of 2×2 and 3×3 matrices.
Physics
The laws that govern everything.6 calculators
Speed Calculator
Calculate speed from distance and time, in m/s, km/h, and mph.
Force Calculator
Calculate force from mass and acceleration (F = ma).
Work / Energy Calculator
Calculate mechanical work or energy from force and distance (W = Fd).
Ohm's Law Calculator
Calculate resistance and power from voltage and current.
Pressure Calculator
Calculate pressure from force and area, in pascals, atm, and psi.
Density Calculator
Calculate density from mass and volume.
Everyday
Everyday, simplified.20 calculators
Age Calculator
Find the exact age in years, months, and days between two dates.
Date Calculator
Add or subtract days, weeks, months, or years from a date.
Password Generator
Generate a random, secure password with the character types you choose.
Currency Converter
Convert between 30 world currencies using live ECB reference rates, with a trend chart.
Conversion Calculator
Convert between units of length, weight, volume, and temperature.
Time Duration Calculator
Find the exact hours and minutes between a start and end time.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Random Number Generator
Generate one or more random numbers within a range you choose.
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, fuel efficiency, and gas price.
Gas Mileage Calculator
Calculate your vehicle's fuel economy in MPG from miles driven and gallons used.
Day Counter
Count the number of days between two dates.
Time Calculator
Add or subtract two durations in hours, minutes, and seconds.
Dice Roller
Roll one or more virtual dice with any number of sides.
Roman Numeral Converter
Convert between numbers and Roman numerals in either direction.
Wind Chill Calculator
Calculate the wind chill temperature from air temperature and wind speed.
Heat Index Calculator
Calculate the heat index ("feels like" temperature) from air temperature and humidity.
Dew Point Calculator
Calculate the dew point from air temperature and relative humidity.
Concrete Calculator
Calculate how much concrete you need for a slab, footing, or pour.
Square Footage Calculator
Calculate square footage from length and width, plus total cost.
Tire Size Calculator
Compare two tire sizes to see the diameter and speedometer difference.
