Date Duration Calculator
Count days, weeks and months between any two dates.
1 Jan to 31 Dec 2026 is 364 days — 52 weeks exactly. Whether you’re counting down to a launch, measuring a notice period or settling a ‘how long’ argument, this gives days, weeks and calendar months in one shot.
How to use the date duration calculator
- Pick the start date.
- Pick the end date.
- See days, weeks and months between.
Date Duration Calculator — FAQs
Does it count both end dates?
It shows the difference (exclusive of the start). Toggle ‘include end date’ when counting inclusive ranges like leave days.
How are months counted?
Calendar months: 15 Jan to 15 Mar = 2 months, regardless of February’s length.
Can it handle past dates?
Yes — durations work forwards and backwards, handy for ‘how long ago’ questions.
What about business days?
Use the business days calculator for working-day counts that skip weekends.
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