Find the exact duration between any two dates, past or future.
This calculator counts the number of full days between the two dates, so the start date itself isn't counted as a full day passed. If you need an "inclusive" count that counts both the start and end date, add 1 to the result shown.
Yes, either date can be in the past or future, and either can come first — the calculator works out the duration regardless of which date is entered in which field.
Yes, the calculation is based on real calendar dates, so leap years are automatically handled correctly without any extra steps.
This is commonly used for project timelines, event planning, calculating notice periods, contract durations, or any situation needing an exact day count between two fixed dates.