Free Date Difference Calculator Online
Find out how many days there are between two dates with our free date difference calculator. Pick a start date and an end date to see the exact number of days, weeks and months between them, instantly and with no signup.
About the Free Date Difference Calculator
People count the days between dates for all sorts of reasons: planning a holiday, counting down to a wedding, working out how long a project will take, or checking how many days are left until a deadline. Counting by hand is slow and easy to get wrong, especially across months with different lengths and leap years.
This calculator does the maths for you. It takes the two dates you choose and works out the exact number of days between them, then converts that into weeks and days, and estimates the months and years. It counts the days between the dates, not including the start date, so 1 January to 2 January is 1 day.
How to Use the Date Difference Calculator
- Choose the start date, for example 1 January 2026.
- Choose the end date, for example 31 January 2026.
- Press Calculate Difference to see the days, weeks and months between the two dates.
Frequently Asked Questions
Is the date difference calculator really free?
Yes. It is completely free with no signup, no trial and no limits. Use it as often as you like.
How many days are there between 1 January and 31 January 2026?
There are 30 days between 1 January and 31 January 2026, which is 4 weeks and 2 days.
Does it count the start and end dates?
It counts the days between the two dates, not including the start date. So 1 January to 2 January is 1 day, and 1 January to 31 January is 30 days.
Can I find the difference if the end date is earlier?
Yes. The calculator shows the number of days between any two dates, no matter which one comes first.
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