## How to calculate the number of weeks between dates

The image above demonstrates a formula that calculates the number of complete weeks between two dates. Column B and column C contains random dates.

Formula in cell D3:

Copy cell D3 and paste to cells below as far as needed.

### Explaining formula in cell D3

This formula works fine if the start is later than the end date, however, you get a minus sign before the number.

If you want to remove the minus sign simply use the ABS function to remove it, the formula then becomes:

=ABS(ROUNDDOWN((C3-B3)/7))

#### Step 1 - Subtract dates

C3-B3

becomes

35067 - 35685 equals 618 days.

#### Step 2 - Divide with 7

There are seven days in a week so we need to divide the result with 7.

(C3-B3)/7

becomes

618/7 equals 88.28571429.

#### Step 3 - Round the number down

The ROUNDDOWN function rounds the number down.

ROUNDDOWN((C3-B3)/7)

becomes

ROUNDDOWN(88.28571429) and returns 88.

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