Days Between Two Dates Calculator
Count the number of days, weeks and months between any two dates.
Quick answer: Subtract the earlier date from the later date. The result is the number of days between them.
Worked example
From 1 January 2026 to 31 December 2026 there are 364 days, which is 52 weeks. Add one more day if you also want to count the start date.
How to use it
- Choose the start date and the end date.
- The calculator shows the days between them, plus weeks and approximate months.
Common mistakes
- Not deciding whether to include both the first and the last day. Counting both adds one day.
Helpful tips
- Useful for deadlines, pregnancy dates, contract notice periods and countdowns.
Read the guide
Frequently asked questions
How do I count days between two dates?
Subtract the start date from the end date; this tool does it for you.
Related tools
Need something custom?
Can't find the calculator or tool you need? Tell us what you're after and we'll build it for you. It takes about two minutes to fill in.
Start the Project Brief