Date Duration Calculator
How long is the span between two dates?
The duration of a range stated the way a person would state it, plus the exact totals underneath and a census of which weekdays fall inside it.
Questions people ask
The things that come up about date duration calculators, answered plainly.
What is the difference between a duration and a date difference?
Nothing, in practice — the same arithmetic under two names. This page leads with the human phrasing ("1 year, 2 months and 4 days"), and the date difference page leads with the unit totals.
How many Mondays are in my range?
The weekday census answers exactly that: a count for each of the seven days, so you can see how many working days, weekend days or particular weekdays a span contains.
Related tools
How far apart two instants are — in whichever unit you need, counting every day or only the working ones.
Date Difference CalculatorEnter two dates and get the gap in every unit at once — years, months and days as a person would say it, and the exact total in weeks, hours, minutes and seconds underneath.
Duration CalculatorA duration in every unit from nanoseconds to decades, with the approximate ones flagged as approximate — because a month has no fixed length and any tool that pretends otherwise is guessing.
Weeks Between DatesWhole weeks and the days left over, plus the exact decimal — a week is the one calendar unit with a fixed length, so this answer is never approximate.
Months Between DatesWhole calendar months and the days left over — worked out by walking the calendar, so the answer matches what a lease, a loan schedule or a notice period means by "a month".