Days between two dates.
Absolute days between two dates. Handy for age, project timelines, and countdown planning.
Uses calendar days including start and end, or excluding — check your use case.
This kind of raw day-count is the building block behind more complex date math — project deadlines, contract terms, and interest-accrual periods are all ultimately counted this same way before any business-day or holiday adjustments are layered on top.
Pick two dates; tool returns the absolute number of days between them.
Returns the difference — so Jan 1 to Jan 2 = 1 day.
Multiply years by 365.25 to include leap-year averaging.
Yes — the calculation works on full calendar dates, so spans crossing year boundaries or multiple leap years are handled the same as any other date range.