Date Difference Calculator
How long between two dates, in every unit.
Date Difference Calculator counts the time between two dates in years, months and days, and also in total days, weeks, hours and minutes. It can count business days only, skipping weekends and any holidays you add, and it can add or subtract a duration from a date. Everything is calculated locally.
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Runs entirely on your device. No file or text you enter here is uploaded. How to verify it.
How to use Date Difference Calculator
- Pick a start date and an end date.
- Choose whether to count every day or business days only.
- Read the difference in each unit, or switch to add/subtract mode.
Questions about Date Difference Calculator
Are both endpoints counted?
By default the end date is excluded, so 1 March to 2 March is one day. There is a toggle to include both, which is what contracts and rental agreements usually mean.
How are business days counted?
Saturdays and Sundays are excluded, and you can paste a list of public holidays for your country. There is no built-in holiday calendar, because holiday rules are national, regional and change every year — a wrong built-in list is worse than none.
Does it handle daylight saving time?
Date arithmetic is done on calendar dates, so DST does not shift the day count. The hour totals assume 24-hour days; a DST transition makes one real day 23 or 25 hours long.
What date format does it expect?
The fields are native browser date inputs, so you pick a day from a calendar rather than typing a string. That removes the 03/04 ambiguity entirely — the display format follows your system locale, and the value underneath is unambiguous either way.
Is this better than doing it in a spreadsheet?
For a single answer, yes: no formula to remember, no cell formatting to fight, and the business-day count is already built in. A spreadsheet still wins when you need the same calculation repeated across hundreds of rows. This page answers one pair of dates at a time.
Is Date Difference Calculator really free, with no limits?
Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.
Are my files or text uploaded when I use Date Difference Calculator?
No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.