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Date Difference Calculator
Date Difference Calculator
What is this tool?
A date difference calculator that does the maths on UTC midnight, so daylight-saving changes never add or drop a day. Pick two dates and every figure updates at once.
When to use it
- Counting down the days until a deadline, launch or event
- Working out how many business days a project or contract spans
- Checking someone's length of service or a subscription's age
- Measuring the gap between two historical dates
- Confirming a notice period or billing interval in days
How to use it
- 1Pick the earlier date in the From field
- 2Pick the later date in the To field (order doesn't matter — use Swap if needed)
- 3Read the total in days, plus the years/months/days breakdown
- 4Check the working-days figure if weekends shouldn't count
- 5Change either date to recalculate instantly
Frequently asked questions
Does it count weekends?
The total-days figure includes every day; the separate 'working days' figure counts only Monday to Friday.
How is the months figure worked out?
The calendar breakdown borrows from the larger unit like a clock (so 30 Jan to 2 Mar is '1 month, few days'), and there's also a rough total-months figure based on an average month length.
Are public holidays excluded from working days?
No — only weekends are removed. Holidays vary by country and aren't accounted for.
Does time zone affect the result?
No — dates are compared at UTC midnight, so the day count is stable everywhere.