Home › Calculators › Date Calculator
Date Calculator
Count the days between two dates, including business days, or add and subtract days to find a due date or deadline.
How the date calculator counts
Days between two dates is the number of midnights between them, so from Monday to Tuesday is 1 day. Tick "include the end date" if you need both days counted, as many leases, notice periods and hotel-style counts do not, but some legal deadlines do. Business days count Monday to Friday only; public holidays are not removed, so subtract the ones that apply to you.
Examples
- From October 25 to December 25, 2026: 61 days, or 8 weeks and 5 days.
- 90 days after October 25, 2026: Saturday, January 23, 2027.
- The whole of 2026 (January 1 to December 31): 364 days apart, 365 counting both ends, with 261 weekdays.
Money deadlines worth counting
- Credit card grace periods are at least 21 days from the statement date.
- A 0% intro APR or balance transfer offer usually ends a set number of months after the account opens.
- Many retailers allow returns within 30 to 90 days of purchase.
- Federal estimated tax payments are due about every three months; see the self-employment tax calculator.
Frequently asked questions
How many days are between two dates?
Subtract the earlier date from the later one. From October 25 to December 25, 2026 is 61 days. Some contracts count both the first and last day, which adds one.
How many business days are in 2026?
January 1 to December 31, 2026 has 261 weekdays (Monday to Friday). Subtract the holidays your employer observes, typically 10 or 11 federal holidays, to get working days.
What date is 90 days from today?
Add the days on the calendar, carrying over month lengths. 90 days after October 25, 2026 is January 23, 2027.