Everyday Calculators

Simple tools for time, grades, dates, shopping, conversions, and daily decisions.

Age Calculator

Calculate exact age in years, months, days, and total elapsed days for any date.

Find the number of days, weeks, hours, and approximate weekdays between two dates.

Calculate a tip, total bill, and amount per person when splitting a check.

Calculate sales tax and the total purchase price from a pre-tax amount and tax rate.

Calculate a discount with tax, including sale price, savings, sales tax, and final price.

Add or subtract two durations in hours, minutes, and seconds with normalized results.

Calculate worked hours between two clock times and deduct an unpaid break.

Calculate a points-based grade and the score needed on remaining work to reach a target.

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.

Convert between milligrams, grams, kilograms, tonnes, ounces, pounds, and stone.

Convert temperatures between Celsius, Fahrenheit, and kelvin.