Your time, worked out

Day calculator
for every date.

Use a free day calculator to count days, calculate age, plan work or compare time zones—without wrestling with a calendar.

Choose a time tool Free · private · instant
17 focused tools0 accounts neededLocal browser calculations
The time toolkit

What do you need to work out?

No menus to decode. Choose one job and get the answer directly.

Most used

Age Calculator

Enter a birth date to see an exact calendar age and the total time elapsed.

Most used

Days Between Dates

Compare any two dates. The result includes total days, weeks and a calendar breakdown.

Most used

Weeks Between Dates

Turn the calendar-day distance between two dates into exact and complete weeks.

Most used

Days Until Date

Count forward from today or another starting date to a deadline, holiday, birthday, wedding or important event.

Date & time

Add or Subtract Days

Move forward or backward from a date using calendar-aware day, week, month and year values.

Date & time

Day of the Week Calculator

Choose any date to find its weekday and the calendar details around it.

Date & time

Business Days Calculator

Count Monday-to-Friday dates in a range, including both selected dates when they are weekdays.

Date & time

Business Date Calculator

Find a deadline or delivery date by moving forward or backward through working days, weekends and optional holidays.

Date & time

Time Duration Calculator

Find elapsed clock time without converting hours and minutes by hand.

Date & time

Date & Time Duration Calculator

Measure the real elapsed time between two dated moments, even when they use different time zones or cross a clock change.

Date & time

Work Hours Calculator

Turn a shift and break into paid hours in hours-minutes and decimal formats.

Date & time

Timesheet Calculator

Total a seven-day timesheet with breaks, overnight shifts, a custom weekly overtime threshold and estimated pay.

Date & time

Countdown Timer

Set a duration and keep the remaining time visible in a distraction-free timer.

Date & time

Online Stopwatch

Measure elapsed time and record laps with one clear set of controls.

Date & time

Time Zone Converter

Choose a local date and time, then see the matching time in another city or zone.

Date & time

Meeting Time Planner

Plan a fair international meeting by comparing local dates and times, then find the working-hour overlap across selected zones.

Date & time

Unix Timestamp Converter

Switch between machine timestamps and human-readable date-time values.

Made for real plans

The answer stays the focus.

Dates can be surprisingly complicated. The interface should not be.

Useful defaultsToday and your local time are filled in where helpful.

Private by defaultInputs are calculated on this device, without an account.

Honest limitsCalendar, holiday and time-zone assumptions stay visible.