Date Difference Calculator
Days between two dates
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Days between—
Weeks between—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- From 2026-01-01 to 2026-12-31 → 364 days ≈ 52 weeks
- From 2024-01-01 to 2025-01-01 (2024 is a leap year) → 366 days ≈ 52.29 weeks
Formula
Days = |date B − date A| ÷ 86,400,000 ms; weeks = days ÷ 7. The result is an absolute difference, so the order of the two dates does not matter. Note this counts calendar days, not working days.
About Date Difference Calculator
Days between two dates. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is the Date Difference Calculator free to use? +
Yes, it is completely free with no registration or download required.
Is my date data private? +
Yes. All date calculations happen locally in your browser. Nothing is uploaded or stored.
Does the Date Difference Calculator account for time zones? +
For time-based tools, calculations use your local device time. Date tools operate on the dates you enter.