Wi Fi Access Point Count Calculator

Work out wi fi access point count instantly with clear inputs, formula shown and shareable results.

About Wi Fi Access Point Count Calculator

Access point count is the larger of two requirements: enough radios to cover the floor area and enough radios to serve the client count at an acceptable device-per-radio ratio. Modern high-density designs are almost always capacity driven, which means more, lower-powered access points rather than fewer high-powered ones.

Formula

AP count

coverage count = ceil(area / coverage per AP); capacity count = ceil(devices / devices per AP); required = max of the two

Worked example

With the default values below, Wi Fi Access Point Count Calculator returns Access points required of 20. Change any input above and every figure here is recalculated in your browser.

Inputs used

Area to coverminimum 1 m2: 2,400 m2
Client devicesminimum 1: 600
Devices per access pointminimum 1: 30
Coverage per access pointminimum 1 m2: 180 m2

Results

Access points required: 20
Count needed for coverage: 14
Count needed for capacity: 20
Binding constraint: Client capacity

Step by step

1Values used
2AP count
3Access points required= 20
4Count needed for coverage= 14
5Count needed for capacity= 20
6Binding constraint= Client capacity

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How many devices per access point is reasonable?

Twenty-five to fifty for general office use, and fewer where every client streams video. Auditoriums are planned at much lower ratios per radio.

Why reduce transmit power in dense deployments?

So cells stay small and clients roam to the nearest AP. High power creates large overlapping cells where every client contends with every other on the same channel.