Calendar-free duration
The difference between two instants is computed as pure millisecond arithmetic — no calendar months or DST transitions are involved, so the breakdown is always exact.
Date Difference Calculator
Calculate the exact calendar-free duration between two dates or timestamps directly in your browser.
English
Converted locally. Nothing is uploaded.Time · Diff
Reading the result
Days, hours, minutes, seconds, and milliseconds are the remainder breakdown of the total duration, plus the total in milliseconds for programmatic use.
Frequently asked questions
If Date A is after Date B, the result is negative — the sign reflects B minus A.