Date difference calculator
Find the duration between two dates — in years, months, days, weeks and total days.
How long between two dates?
Whether you're counting days to an exam, the gap between two events, the length of a project, or your notice period, this calculator gives you the exact duration between any two dates — broken down into years, months and days, plus totals in months, weeks and days.
It uses the real calendar, so leap years and month lengths are handled correctly, and everything runs privately in your browser.
Frequently asked questions
How do I calculate the number of days between two dates?
Select the start date and the end date. The tool instantly shows the difference in years, months and days, along with the total number of days and weeks.
Does it count leap years correctly?
Yes. The calculation uses the actual calendar, so leap years and varying month lengths are handled accurately.
Can I use it for future dates?
Yes — pick any two dates, past or future, to find the duration between them.
Is it free?
Yes — free, no sign-up, and it runs entirely in your browser.
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