Days Between Dates Calculator

Frequently Asked Questions

Does the calculator count both the start and end day?

By default it counts the gap between the two dates (exclusive). Tick "include the end day" to count both dates, which adds one to the total.

Does it account for leap years?

Yes. The calculation is based on real calendar dates, so leap years and different month lengths are handled automatically.

Can I count days into the future?

Yes. Set today as the start date and a future date as the end date to count down the days until an event.

What if I enter the dates in the wrong order?

It still works — the calculator uses the absolute difference, so the result is always a positive number of days.

Is my data kept private?

Yes. The calculation happens entirely in your browser. No dates are uploaded or stored.

Days Between Dates Calculator — Find the Duration Between Any Two Dates

Counting the exact number of days between two dates by hand is deceptively fiddly — months have different lengths, leap years add a day to February, and it's easy to be off by one depending on whether you count the final day. Our Days Between Dates Calculator removes the guesswork: pick a start date and an end date, and see the precise gap instantly.

The result is shown three ways — total days, a weeks-and-days breakdown, and an approximate number of months — so you can read the duration in whatever unit makes sense for your situation. An optional "include the end day" toggle lets you switch between an exclusive count (the gap between the dates) and an inclusive count (the total number of days in the range), which matters for things like counting vacation days or billing periods.

Common uses include: counting down the days until a wedding, holiday, deadline, or due date; working out how long ago something happened; calculating the length of a project, lease, or subscription period; counting days for travel itineraries and visa stays; and figuring out how many days are left in a notice period. Because the calculation is based on calendar dates, it correctly accounts for leap years and varying month lengths automatically.

How to Use the Days Between Dates Calculator

Select the start date using the date picker.
Select the end date.
Instantly see the total number of days, plus weeks and months.
Tick "include the end day" if you want the count to include both dates.