Dates & time
Dates & time: 16 free calculators & tools, including Age and zodiac and Date difference. Explore formulas, examples and visual explanations.
Dates & calendars
Age and zodiac
Calculate your age, next birthday, and Western and Chinese zodiac from your date of birth.
Date difference
Count days, weeks, and calendar years/months between two dates.
Add or subtract dates
Find a date by adding or subtracting years, months, weeks, and days.
Business days
Count working days using your chosen weekdays and excluded dates.
Clocks & time
Time duration
Compare clock differences and elapsed time, including overnight shifts and daylight saving changes.
Work hours and timesheet
Total shift hours after breaks and estimate gross pay at your entered rate.
Time zone meeting planner
Compare a meeting across cities or find shared availability, with local start and end times.
Date and time countdown
Track the time remaining until a chosen date and time, or use a frozen reference.
World clock
Compare the current time, date and UTC offset in cities around the world.
Time zone converter
Convert a date and time between cities, with daylight-saving changes and clear day differences.
Online clock
Display your device’s local time with a digital or analog clock and a fullscreen view.
Alarm clock
Set a local alarm, test its sound and see when it will ring.
Stopwatch
Measure elapsed time, pause and resume, and record lap and total times.
Countdown timer
Count down a duration in hours, minutes and seconds with an optional sound alert.
