How to use it
Pick a start date and an end date. The calculator counts the days between them, including the end date but not the start date (the standard convention).
Example
Example: 1 January 2026 to 1 February 2026 → 31 days (4 weeks and 3 days).
Date Difference Calculator
Find the exact number of days between two dates — plus weeks, months, and years.
Days between dates
Frequently asked questions
How are days between dates counted?
The calculator counts whole days from the start to just before the end date — a common convention for deadlines.
How many days are in a year?
365, or 366 in a leap year (divisible by 4, except centuries not divisible by 400).
Can I count business days?
Not yet — this counts calendar days. A business-days option is planned.