# Excel DEVSQ Function

The Excel DEVSQ function returns the sum of the squared deviations from the mean for a given set of data.

**number1**- First value or reference.**number2**- [optional] Second value or reference.

The Excel DEVSQ function calculates the sum of the squared deviations from the mean for a given set of data.

Variance and standard deviation functions deal with negative deviations by squaring deviations before they are averaged. DEVSQ calculates the sum of the squared deviations from the mean, without dividing by N or by N-1.

In the example shown, the formula in G5 is:

=DEVSQ(B5:B10)

The formulas in C5 and D5 are, respectively:

=B5-$G$4 // deviation =C5^2 // squared deviation

The value in D12 (34) us simply the sum of D5:D10, and agrees with the value calculated directly by DEVSQ in G5.

### Notes

- Arguments can be numbers, names, arrays, or references that contain numbers.
- Empty cells, and cells that contain text or logical values are ignored.

## Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.