# Wireless Access

Occasional Contributor I

## Estimating number of APs

Hi,

I´m reviewing ACDP Official Certification Study Guide and I have a doubt. In RF Planning module, Aruba indicates a formula to estimate number of APs for two ways:

- Coverage based design (estimate)

Example calculation:

100,000 sq footage building

100,000/5000 --- 40 APs

- Capacity based design - High Density (estimate)

Example calculation:

100,000 sq footage building

100,000/2500 --- 66 APs

In both cases, when I make the math, the result is different. In first case I get 20 APs, and the second 40 APs. What could be the mistake?

Attached the image of the book calculation.

Thanks for your help.

Accepted Solutions
Highlighted
MVP

## Re: Estimating number of APs

It's a typo in the book. The recommendation in the book for coverage is  one AP for every 5000 sq feet, so 100,000/5000 = 20

For capacity it is one AP for every 2500 sq feet, so 100,000/2500=40

For high-capacity it is one AP for every 1500 sq feet, so 100,000/1500=66

I hope this helps,

David
Sr. Trainer and Author of "Understanding ArubaOS: Version 8.x" book

--Give Kudos if you found something helpful, important, or cool.
--Problem Solved? Click "Accepted Solution" in a post.

All Replies
Highlighted
MVP

## Re: Estimating number of APs

It's a typo in the book. The recommendation in the book for coverage is  one AP for every 5000 sq feet, so 100,000/5000 = 20

For capacity it is one AP for every 2500 sq feet, so 100,000/2500=40

For high-capacity it is one AP for every 1500 sq feet, so 100,000/1500=66

I hope this helps,

David
Sr. Trainer and Author of "Understanding ArubaOS: Version 8.x" book

--Give Kudos if you found something helpful, important, or cool.
--Problem Solved? Click "Accepted Solution" in a post.