Calculators & timers
Quick answers for everyday math: convert units, work out percentages and tips, count days and ages, plan a loan and add up hours. Plus a timer, stopwatch and alarm.
Unit ConverterConvert cm to inches, kg to pounds, Celsius to Fahrenheit, cups to ml, mph to km/h, GB to MB and more. Every unit at once, exact definitions, works offline. Free.OpenPercentage CalculatorWork out any percentage: X% of Y, what percent one number is of another, percentage increase or decrease, discounts with sales tax, and tips split between friends. Free, shows the working.OpenAge & Date CalculatorWork out an exact age in years, months and days, count the days or working days between two dates, and add or subtract days, weeks or months. Free, calculated on your device.OpenLoan & Mortgage CalculatorCalculate your real monthly mortgage or loan payment with taxes, insurance, PMI and HOA. See how extra payments save interest, with a full amortization schedule.OpenTimesheet CalculatorWeekly timesheet calculator with breaks, overtime (40-hour, 8-hour or California rules) and pay. Print or download a PDF. Free, no sign-up.OpenTimer & StopwatchA free online countdown timer with alarm sound, a stopwatch with laps, an alarm clock and a Pomodoro focus timer. Full screen, keeps time in a background tab. No sign-up.Open
Popular uses
- Kilograms to Pounds (kg to lbs)
- Centimeters to Inches (cm to in)
- Celsius to Fahrenheit (°C to °F)
- Online Stopwatch
- Countdown Timer
- Pomodoro Timer
- Online Alarm Clock
- Age Calculator
- Days Between Dates
- Tip Calculator & Bill Splitter