Days Between Dates Calculator
Calculate the exact difference between two dates, broken down into calendar days and working days. Useful for contract deadlines, notice periods, invoice due dates, or simply finding out how long is left until a given date.
How it is calculated
(End date − Start date) ÷ 1 dayFull weeks × 5 + remaining Mon-Fri daysThe calculation is done in universal time, so the result stays the same regardless of the country you check it from.
Example
Between 1 and 31 January 2026 there are 30 calendar days. Of those, 22 are working days (Monday to Friday) and 8 fall on a weekend.
Frequently asked questions
Are public holidays excluded?
No. Working-day mode only excludes Saturdays and Sundays. National, regional and local public holidays vary by location and aren't excluded automatically.
Is the first day counted?
The difference between the two dates is calculated, so the start day isn't counted as a full day. If you need to include both endpoints, add one to the result.
What is this typically used for?
Resignation notice periods, rental contract terms, invoice due dates, probation periods, or accrued holiday days.