Date & time
Date and time tools: work out your age, the difference between two dates, the day of the week, time zones and Unix timestamps.
Tools — Date & time
Age calculator
Calculate current age from a date of birth.
Date difference calculator
Calculate days and approximate months between two dates.
Day of the week calculator
Find out what day of the week you were born and your exact age.
Age difference calculator
Work out the exact age gap between two people in years, months and days.
Time zone converter
Convert a time between time zones and see the current time around the world. Plan meetings across countries.
Unix timestamp converter
Convert a Unix timestamp to a date and back, with UTC and ISO output.
Business days calculator
Count the working days (Monday to Friday) between two dates, excluding weekends. Instantly.
Countdown timer
Live countdown to a date and time: days, hours, minutes and seconds. No sign-up.
Duration calculator
Work out how long between two times (even across midnight): hours and minutes. Instantly.
Date calculator (add / subtract)
Add or subtract days, weeks, months or years from a date and get the resulting date. Free and instant.
Online stopwatch
A free online stopwatch with start, pause and reset. Accurate to hundredths of a second, in your browser.
Pomodoro timer
A free online Pomodoro timer: 25-minute work sessions and 5-minute breaks. Runs in your browser, no setup.
Leap year calculator
Check if any year is a leap year and find the next one. Free, instant, in your browser.
Zodiac sign calculator
Find your zodiac (star) sign from your date of birth. Free, instant, in your browser.
Moon phase calculator
Find the moon phase and illumination for any date. Free, instant, in your browser.
Chinese zodiac calculator
Find your Chinese zodiac animal and element from your birth year. Free, instant, in your browser.
Sunrise & sunset calculator
Calculate sunrise, sunset and day length for any latitude, longitude and date. Free, in your browser.