Date Duration Calculator
Pick a start date and an end date to see the exact duration between them — in days, weeks, months and years. Great for project planning, age gaps and event countdowns.
How to use
- Choose the start date and the end date.
- Tick “Include end date” if you want both endpoints counted.
- Click Calculate Duration to see days, weeks, months, years, hours and minutes.
Frequently asked questions
Does it count the end date?
By default the difference is exclusive of the end date. Tick the checkbox to include it — useful for bookings and rentals.
How are months calculated?
Months vary in length, so we show an approximate figure (days ÷ 30.44) plus an exact years/months/days breakdown.
Does it handle leap years?
Yes — the day count is exact, including February 29 in leap years.
Is this tool free?
Yes, completely free with no signup — and it works offline once loaded.
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