What if I enter the end date before the start date?

It still works. The tool uses the absolute difference, so swapping the two dates gives the same positive number of weeks.

How accurate is the week count?

It is exact to the day. Both dates are floored to local midnight before subtracting, so there is no hour-of-day rounding. Full weeks are whole sevens of days, and the decimal figure is total days divided by seven.

Weeks Between Two Dates

Q: Are my dates sent anywhere?

No. The calculator is privacy-first — both dates stay in your browser and are never uploaded to a server.

Weeks between two dates

Find out how many weeks separate any two dates. Enter a start and end date and the tool reports the span as full weeks plus leftover days, as an exact decimal-week figure, and as a total day count.

The order does not matter — the result is always the positive distance between the two dates, floored to whole calendar days so the count is reliable for pregnancy tracking, project planning, leave calculations and more.

It is privacy-first: both dates stay in your browser and are never sent anywhere.