Calculators
Work out health numbers, loan payments, project materials, grades and everyday maths. Every calculator shows the formula it uses so you can check the result yourself.
Health & Fitness
BMI Calculator
Calculate your BMI in metric or imperial units. See your weight category, the healthy…
Calorie Calculator
Find out how many calories you need per day to maintain, lose or gain weight. Uses the…
BMR Calculator
Calculate your basal metabolic rate (BMR): the calories your body burns at rest. Uses…
Macro Calculator
Turn your daily calories into grams of protein, carbohydrates and fat. Choose balanced…
Body Fat Calculator
Estimate your body fat percentage from simple tape measurements using the US Navy…
Ideal Weight Calculator
Find your ideal body weight for your height using the Devine, Robinson, Miller and Hamwi…
Money & Finance
Mortgage Calculator
Calculate your monthly mortgage payment, total interest and a yearly amortization…
Loan Calculator
Calculate the monthly payment, total interest and total cost of a personal loan.…
Auto Loan Calculator
Calculate your monthly car payment with down payment, trade-in value, sales tax…
Investment Calculator
See how an investment grows with regular monthly contributions and compound returns.…
Compound Interest Calculator
Calculate compound interest with daily, monthly, quarterly or yearly compounding and…
Savings Goal Calculator
Find out how much you need to save each month to reach a savings goal by a set date…
Home & DIY
Square Footage Calculator
Calculate square footage for rectangles, circles and triangles in feet or meters.…
Paint Calculator
Work out how many gallons or liters of paint you need for a room. Accounts for doors…
Concrete Calculator
Calculate how much concrete you need for slabs, footings, walls and round columns.…
Flooring Calculator
Calculate how much flooring you need for a room, including waste. Works for laminate…
Roofing Calculator
Estimate roof area from the building footprint and pitch. Shows roofing squares, shingle…
Mulch and Soil Calculator
Calculate how much mulch, topsoil, compost or gravel you need for a garden bed. Results…
Everyday Utilities
Percentage Calculator
Calculate percentages instantly: X% of Y, X is what percent of Y, percentage change, and…
Tip Calculator
Calculate the tip and total for any bill and split it between any number of people.…
Discount Calculator
Calculate the sale price and savings for any percentage discount. Supports stacked…
Date Difference Calculator
Count the days, weeks, months and years between two dates. Also shows weekdays, weekend…
Age Calculator
Calculate your exact age in years, months and days from your date of birth. Also shows…
Time Duration Calculator
Calculate the hours and minutes between two times, subtract breaks and convert to…
Math & Science
GPA Calculator
Calculate your semester and cumulative GPA on a 4.0 scale. Add courses, letter grades…
Grade Calculator
Calculate your weighted course grade from assignments, quizzes and exams, and find the…
Average Calculator
Calculate the mean, median, mode, range, sum and geometric mean of any list of numbers.…
Fraction Calculator
Add, subtract, multiply and divide fractions. Get the answer simplified to lowest terms…
Statistics Calculator
Calculate standard deviation, variance, mean, median, mode, quartiles, IQR, range and…
Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0. Get real or complex roots, the…