Date Diff — Difference Between Dates
The date difference calculator computes the exact time interval in various units: years, months, days, hours, minutes, and seconds. Useful for project planning, age calculation, event duration, and time intervals between dates.
How the Difference Is Calculated The tool calculates the difference in two ways: a "calendar" breakdown (years, months, days, hours, minutes, seconds) accounts for varying month lengths and leap years, while the "total" shows the full count of days, hours, minutes, and seconds between dates. All calculations happen locally in your browser.
Calendar Breakdown
| 0 | years |
| 0 | months |
| 0 | days |
| 0 | hours |
| 0 | minutes |
| 0 | seconds |
Total
| 0 | days |
| 0 | hours |
| 0 | minutes |
| 0 | seconds |
Free online date and time difference calculator. Enter start and end dates and instantly get the result in multiple formats: years-months-days-hours-minutes-seconds and the total number of days, hours, minutes, and seconds.
The calculator correctly accounts for varying month lengths (28–31 days) and leap years when computing the calendar difference. The "Now" button lets you quickly insert the current date and time. Useful for age calculation, project planning, event duration, and other tasks.
All computations are performed locally in your browser via the JavaScript Date API. The tool requires no registration, is completely free, and is available in both Russian and English. Perfect for developers, project managers, and anyone who needs to precisely calculate a time interval.