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Free Date and Time Tool

Date Difference Calculator

Two dates in, exact days, weeks, months and years out, with a visual timeline breakdown of the result.

100% Free No signup Runs in your browser No uploads

Total difference

0 days

0

Weeks

0

Total months

0

Years / months / days

Timeline breakdown

0 years 0 months 0 days

Formula used

Days = (End date - Start date) in milliseconds / 86,400,000

Weeks = days / 7. Years and months come from exact calendar math, with leap years handled automatically.

Frequently asked questions

Does it count the end date?

By default no: it counts the days strictly between the two dates, like the old version of this tool. Tick the inclusive checkbox to count both the start and end day.

How are months calculated?

With exact calendar math, not by dividing by 30. Full years and full months are counted on the calendar, and the leftover days are shown separately, so month lengths and leap years are handled correctly.

Can I use it to count down to a future date?

Yes. Put today (or any start date) first and your target date second, and the tool shows exactly how many days, weeks and months remain.

Preview

Date Difference Calculator tool preview
Live preview of the Date Difference Calculator tool running in your browser. Your data never leaves your device.

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