Date Difference Calculator
Find the time between two dates in days, weeks, months and years — instantly and privately, in your browser.
🔒 Calculated in your browser — no dates are uploaded.
How much time between two dates?
Pick a start and end date to see the difference expressed as total days, whole weeks (with leftover days), total calendar months and total years. Useful for deadlines, project timelines, anniversaries and countdowns. It runs entirely in your browser.
Days vs months vs years
Days and weeks are exact counts, while months and years follow the calendar — so the same span can be described several ways, and you can pick whichever unit fits your need.
Frequently asked questions
Does the order of the dates matter?
No. The difference is always positive regardless of which date you put first.
How are months counted?
By the calendar: full months between the dates, then the remainder. Total days and weeks are exact counts.
Are my dates uploaded?
No. The calculation happens locally in your browser.