About the Days Between Dates
Tezmy's Days Between Dates calculator answers two everyday questions. First, how long is it between two dates? You get the total days, weeks and days, years-months-days, and the number of weekdays (Monday to Friday), with an option to include the end date. Second, what date is it N days from now? Add or subtract calendar days or weekdays only to find deadlines, due dates, notice periods and delivery dates. Leap years and month lengths are handled automatically.
Updated October 2026
How to use the Days Between Dates
- 1Choose “Days between two dates” or “Add or subtract days”.
- 2Pick your dates. Press Today to fill in today's date.
- 3Tick “Include the end date” if both days should count.
- 4Read the result: days, weeks, weekdays or the new date.
Everyday uses
- Count down to a wedding, holiday, exam or birthday.
- Work out notice periods, contract lengths and rental terms.
- Find a due date: 30, 60 or 90 days from an invoice date.
- Count working days for a project or delivery.
- See how many days you've been in a job, a relationship or a country.
Including the end date
By default, the count doesn't include the end date: from 1 to 2 January is 1 day. Tick the option to include it when both days count, like a hotel stay you pay for per night including the last, or an event running from Monday to Friday, which is 5 days, not 4.
Business days and deadlines
Weekdays mode counts only Monday to Friday. When adding days, choose weekdays only to find a date like “10 business days from today”. Public holidays aren't removed, because they differ between countries, so subtract any holidays that fall in the period yourself.
Leap years and month lengths
The calculator uses the real calendar, so February has 29 days in leap years and every month has its correct length. That makes it accurate for long periods, such as the number of days between two birthdays or the length of a mortgage. Counting days is often the first step of another question. To work out someone's exact age, open the Age Calculator, and if you need to turn the answer into weeks or hours, the Unit Converter does it. For loan deadlines, the Loan Calculator shows how a number of days turns into interest.
Features
- Total days, weeks and days
- Years, months and days breakdown
- Weekday (business day) count
- Add or subtract days from a date
- Weekdays-only mode for deadlines
- Leap years handled correctly
Frequently asked questions
Should I include the end date?
It depends on what you're counting. From Monday to Friday is 4 days apart, but if you're counting days of a holiday or an event that covers both days, include the end date to get 5.
What counts as a business day?
Here, business days are Monday to Friday. Public holidays aren't removed because they differ by country, so subtract any holidays yourself.
How do I find the date 90 days from today?
Choose “Add or subtract days”, press Today, keep Add selected, type 90 and read the date. Choose “Weekdays only” to skip weekends.
Does it account for leap years?
Yes. Every calculation uses real calendar dates, so 29 February and months of different lengths are counted correctly.
How many weeks are between two dates?
The result shows full weeks plus leftover days, for example 12 weeks and 3 days. For decimal weeks, divide the total days by 7.
How many days until a date?
Put today's date first and the future date second. The result shows the days to go, plus weeks and weekdays.
How do I subtract days from a date?
Choose Add or subtract days, pick Subtract, enter the date and the number of days, like 30 days before a deadline, to see the earlier date.
How many working days are between two dates?
Enter both dates and read the weekdays count, which leaves out Saturdays and Sundays.
Is it free and private?
Yes. It's free with no sign-up, and the dates you enter stay on your device.