How are months counted?

Calendar months from the start date; from 31 January, one month later is the end of February.

No. Everything is calculated in your browser and your inputs are saved only on this device.

Free Date Difference & Age Calculator

Enter two dates to see the time between them, or a birthday to get an age.

Start date (or birthday)End date

Difference–

Total days–

Weeks–

Total months–

How are months counted?: Calendar months from the start date; from 31 January, one month later is the end of February.
Is my data stored?: No. Everything is calculated in your browser and your inputs are saved only on this device.