# Excel PERCENTILE.INC Function

The Excel PERCENTILE.INC function calculates the "kth percentile" for a set of data where k is 0 to 1, inclusive. A percentile is a value below which a given percentage of values in a data set fall. You can use PERCENTILE.INC to determine the 90th percentile, the 80th percentile, etc.

**array**- Data values.**k**- Number representing kth percentile.

The Excel PERCENTILE.INC function calculates the "kth percentile" for a set of data, where k is between 0 and 1, inclusive. A percentile is a value below which a given percentage of values in a data set fall. A percentile calculated with .4 as k means 40% percent of values are less than or equal to the calculated result, a percentile calculated with k = .9 means 90% percent of values are less than or equal to the calculated result.

To use PERCENTILE.INC, provide a range of values and a number between 0 and 1 for the "k" argument, which represents percent. For example:

=PERCENTILE.INC(range,.4) // 40th percentile =PERCENTILE.INC(range,.9) // 90th percentile

You can also specify k as a percent using the % character:

=PERCENTILE.INC(range,80%) // 80th percentile

PERCENTILE.INC returns a value greater than or equal to the specified percentile.

In the example shown, the formula in G5 is:

=PERCENTILE.INC(scores,E5)

where "scores" is the named range C5:C14.

### PERCENTILE.INC vs. PERCENTILE.EXC

PERCENTILE.INC includes the full range of 0 to 1 as valid k values, compared to PERCENTILE.EXC which excludes percentages below 1/(N+1) and above N/(N+1).

*Note: Microsoft classifies PERCENTILE as a "compatibility function", now replaced by the PERCENTILE.INC function.*

### Notes

- k can be provided as a decimal (.5) or a percentage (50%)
- k must be between 0 and 1, otherwise PERCENTILE.INC will return the #NUM! error.
- When percentiles fall between values, PERCENTILE.INC will interpolate and return an intermediate value.