Date and time calculators
Six free tools that run in your browser: convert time zones, count the days between dates, calculate an age, set a countdown timer, time laps with a stopwatch and convert Unix timestamps.
Time zone converter
Compare time zones for a chosen date, account for daylight saving, and share a meeting time or download a calendar invitation.
Date calculator
Calculate days between two dates, include both dates, or add and subtract calendar days or weekdays. Weekdays exclude weekends, not holidays.
Countdown timer
Set a free online countdown timer for minutes and seconds. Pause, resume or reset it, with an optional sound when time is up.
Stopwatch
Measure elapsed time with a free online stopwatch. Record lap and split times, pause and resume, and download your laps as a CSV file.
Age calculator
Calculate your age in years, months and days from your date of birth. Choose a reference date and see the days until your next birthday.
Unix timestamp converter
Convert Unix timestamps in seconds or milliseconds to readable dates, or convert a date back to Unix time. See UTC and local time together.
How the tools handle your data
Calculations run in your browser. No account is needed, and your inputs are not sent to our server.