Calculate the exact number of days between any two dates. Enter your dates below for calendar days, working days, full weeks, months and years — worked out instantly.
How are the days calculated?
Calendar days count every day between your two dates, including weekends and bank holidays. Working days exclude Saturdays, Sundays, and England and Wales bank holidays for 2026 and 2027 — useful for things like notice periods, contract deadlines, or working out when a delivery or response is actually due.
Months are calculated as calendar days divided by 30.44, the average number of days in a month across a year. This avoids the awkward jump you’d get from counting “3 months” differently depending on whether those months are 28, 30 or 31 days long. Years are calculated as calendar days divided by 365.25, which accounts for the extra day added in leap years.
Worked examples:
If a supplier says delivery takes “10 working days” from an order placed on Tuesday 3 March 2026, that lands on Tuesday 17 March — but only if no bank holidays fall in between. Good Friday and Easter Monday later that spring would push a similar order back by two extra days.
Common questions
Does the count include today?
Yes — both the start and end dates are included as full days in the calendar day count.
Why does the months figure look like a decimal?
Because months don’t all have the same number of days, showing an exact decimal (rather than rounding to a whole number) gives you a more accurate answer than “3 months” would.
Does the working days count include Scottish or Northern Irish bank holidays?
No — this calculator uses England and Wales bank holidays. If you need Scotland or Northern Ireland dates, the figures will differ slightly, since some holidays (like St Andrew’s Day or St Patrick’s Day) only apply there.
See also
Need to count only working days? Use our UK working days calculator which gives a full breakdown including bank holidays excluded. See UK bank holidays 2026 for the full list of dates, or check is today a bank holiday for an instant answer.