Day Counter
Count the number of days between two dates, inclusive or exclusive.
How to use this calculator
Enter the requested values, then select Calculate. Results are processed locally in your browser for this static website.
Accuracy notes
Results may be affected by rounding, unit conventions and the assumptions shown by the calculator. Verify important calculations independently.
What this calculator solves
Count the number of days between two dates, inclusive or exclusive. This page provides the interactive calculation together with a plain-language explanation so the result can be checked against the underlying method.
Science and formulae
The day count is the difference between the two calendar dates, with the selected inclusive or exclusive convention.
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