Date & Time
Ages, date maths, countdowns, timers and time zones.
Date and time tools answer everyday questions about dates, durations, and the clock. You can work out an age, measure the gap between two dates, add or subtract days, count business days, convert a time across zones, or find a week number. Timers cover the rest: a countdown for a deadline, a stopwatch to measure anything, a Pomodoro timer for focused work, and a big classroom timer for the board. Handy for planners, remote teams, students, and anyone doing quick date maths.
Age CalculatorAge from a birth date.Countdown TimerCount down to a date.Date DifferenceDays between two dates.Pomodoro TimerFocus in 25-minute blocks.StopwatchSimple online stopwatch.Classroom TimerBig full-screen countdown for the class.Business Days CalculatorWorking days between dates.Work Hours CalculatorHours from a timesheet.Week Number CalculatorFind the current week number.Add or Subtract DaysShift a date by N days.Live Clock & Time Zone ConverterLive local clock, plus convert times worldwide.
Frequently asked questions
- Are the date and time tools free, and do I need an account?
- Yes, every date and time tool here is free to use, with no account or sign-up and no usage limits. You can calculate an age, run a timer, or convert a time zone as many times as you like. Nothing is held back behind a paywall or a login.
- Do I need to install anything to use them?
- No. The date and time tools run in a normal web browser on desktop or mobile, so there is nothing to download or install. Open the tool you need and use it straight away.
- Is it safe to enter my dates into these tools?
- Most of these tools run in your browser, which means the dates and times you enter are processed on your own device while you work. There is no account, so nothing you type is tied to your identity. They are fine to use for personal dates and deadlines.
- Which tool should I use for which job?
- For the space between two dates, use Date Difference; to shift a date forward or back, use Add or Subtract Days. Use the Age Calculator for someone's exact age, the Time Zone Converter to line up a meeting across regions, and the Business Days Calculator when weekends should not count. For focus and timing, reach for the Pomodoro Timer, Countdown Timer, or Stopwatch.