The full toolkit
All Calculators
41 of 41 tools · search or filter to find yours.
Loan Calculator
Monthly payment, total interest, and a full amortization schedule.
Compound Interest Calculator
See how savings grow with compound interest and monthly contributions.
Simple Interest Calculator
Calculate simple interest and total repayment on a principal.
Discount Calculator
Find the sale price and how much you save from a percentage discount.
Sales Tax Calculator
Add sales tax to a price to get the tax amount and final total.
Tip Calculator
Calculate the tip, total, and amount per person when splitting a bill.
Mortgage Calculator
Estimate your full monthly mortgage payment including principal, interest, taxes and insurance.
Retirement Calculator
Project your retirement savings from your current age, contributions and expected return.
Auto Loan Calculator
Estimate your monthly car payment with down payment, trade-in, sales tax and APR.
Debt Payoff Calculator
See how long to pay off a credit card or loan, total interest, and the power of extra payments.
BMI Calculator
Body Mass Index from height and weight, metric or imperial.
Calorie (TDEE) Calculator
Estimate your BMR and daily calorie needs using the Mifflin-St Jeor equation.
Due Date Calculator
Estimate your pregnancy due date, current week and trimester from your last period.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method.
One Rep Max Calculator
Estimate your one-rep max from a lift and see training weights for every percentage.
Running Pace Calculator
Find your pace per mile and per km, plus speed, from a distance and finish time.
Ideal Weight Calculator
Estimate your ideal body weight using the Devine, Robinson and Hamwi formulas.
Quadratic Formula Calculator
Solve ax² + bx + c = 0 with real or complex roots and the discriminant.
Standard Deviation Calculator
Compute mean, variance, and population/sample standard deviation for a data set.
Concrete Calculator
Cubic yards, pre-mixed bags, and cost for a concrete slab.
Paint Calculator
Estimate how many gallons of paint you need from room size and coats.
Tile Calculator
Work out how many tiles and boxes you need for a floor or wall.
Square Footage Calculator
Calculate the square footage of a room or lot and estimate material or flooring cost.
Gravel Calculator
Estimate the gravel needed for a driveway or area in cubic yards, tons and cost.
Age Calculator
Find your exact age in years, months, days — plus total weeks, days and hours.
Time Duration Calculator
Calculate the exact duration between two dates and times.
Work Hours Calculator
Add up worked hours from a start and end time, minus breaks, in decimal and HH:MM.
Temperature Converter
Convert instantly between Celsius, Fahrenheit and Kelvin.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Weight Converter
Convert between kilograms, grams, pounds, ounces, stone and tonnes.
Date Calculator
Find the days between two dates, or add and subtract days, weeks, months and years.
Fuel Cost Calculator
Estimate the fuel cost and gallons for a trip from distance, MPG and gas price.
Speed Converter
Convert between miles per hour, kilometers per hour, meters per second, knots and feet per second.
GPA Calculator
Calculate your grade point average from letter grades and credit hours.
Cooking Converter
Convert recipe amounts between cups, grams, milliliters and spoons by ingredient.
Area Converter
Convert area between square feet, meters, yards, acres, hectares and more.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Weight on Planets
See how much you would weigh on the Moon, Mars, Jupiter and every other planet.
Age on Planets
Find out how old you are on Mercury, Mars, Jupiter and beyond, based on orbital years.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly.
Morse Code Translator
Translate text to Morse code and decode Morse code back to text.
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