Days Between Dates Calculator
Find the exact number of days, weeks, and months between two dates. Useful for project deadlines, travel, and event planning.
Total Days
—
Total Weeks —
Approx. Months —
How to Use This Calculator
- Enter Date 1 (year, month, day).
- Enter Date 2 (year, month, day).
- The results instantly show the difference in days, weeks, and approximate months.
Formula
Days = |Date 2 − Date 1| (in milliseconds ÷ 86,400,000)
Weeks = floor(Days ÷ 7) | Months ≈ floor(Days ÷ 30.44)
Example
Example: Jan 1, 2024 to Dec 31, 2024 = 365 days (52 weeks, 11 months).
Frequently Asked Questions
- The calculator counts the calendar days between date 1 and date 2, inclusive of neither or both endpoints depending on convention — it uses the absolute difference.
- The standard calculator counts all calendar days. A business-days option is available in the advanced settings to exclude weekends.
- No — the calculator always returns a positive result regardless of which date is entered first.
- Weeks are exact (days ÷ 7, floored). Months are approximate (days ÷ 30.4375, floored).
- Yes — enter today as date 1 and your event date as date 2 to see how many days remain.