Date & Time Tools

11 free calculators in this category — no sign-up required.

Add or subtract days from a date, or find the number of days between two dates — one flexible tool f…

Find the exact number of days between two calendar dates — for deadlines, anniversaries, or countdow…

Add any number of days to a starting date to find the resulting calendar date — useful for deadlines…

Subtract a number of days from a date to find what date it was in the past.…

Calculate the number of full weeks (and leftover days) between two dates.…

Calculate the number of full months (and leftover days) between two dates.…

Count the number of business days (Monday–Friday) between two dates, excluding weekends.…

Calculate the number of working days between two dates or from a start date forward — the same weekd…

Enter a date of birth to calculate exact age in years, months, and days — plus a countdown to the ne…

Set a target date and time and watch a live countdown in days, hours, minutes, and seconds — great f…

Calculate the precise difference between two date-and-time combinations, down to the minute.…

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Calendar Wall Clock

Date, day, and time in one glance — no phone required.

Useful for tracking deadlines calculated with the tools on this page.

Desk Planner & Calendar Pad

A physical planner for logging dates and countdowns.

Pairs a written record with the date math you calculate here.