Free tool

Days between dates, and date maths.

Pick two dates to see the days between them, the weeks, the months and days, and the working days from Monday to Friday, less any holidays you list. Count the end date or not. Below, add or take away days, weeks, months, years or business days from any date to find a deadline, a due date or an anniversary.

Add or take away

Worked out in your browser. Nothing is sent anywhere.

Two tools in one

Count days, or move a date.

01 / Between

Days, weeks, months

From one date to another in days, in weeks and days, and in calendar months and days.

02 / Working days

Monday to Friday

Weekends are skipped, and so are any holidays you list.

03 / Add

Deadlines and due dates

Add 90 days, 10 business days or 6 months. Month ends are handled: 31 January plus a month is 28 or 29 February.

Questions

Good to know.

How many days are between two dates?

Pick both dates; the count shows at once. Tick Count the end date to include both days.

How do I count working days?

The Working days card counts Monday to Friday. List holidays to skip them too.

How do I add days to a date?

Use Add or take away: pick the date, the amount and the unit.

What is 31 January plus one month?

The last day of February, because February has no 31st.

Do time zones change the answer?

No. Whole calendar days are counted.