Access Point Density Calculator
Size an access point count from both coverage area and client capacity, and see which of the two actually drives the design.
About Access Point Density Calculator
A circular cell of radius r covers π·r², but neighbouring cells must overlap for roaming, so only part of that area counts towards the floor plate. Dividing the area by the usable cell area gives the coverage count, dividing the client population by the per-radio target gives the capacity count, and the design must satisfy both. Designs that only count coverage look fine on a heatmap and then collapse at 09:00 when every desk associates at once; designs that only count capacity leave dead corners.
Formula
Access Point Density
coverage APs = area ÷ (π·r²·(1 − overlap)); capacity APs = clients ÷ clients per radio; the design count is the larger of the two.
- r
- Design cell radius in metres
- overlap
- Fraction of each cell that overlaps a neighbour
Worked example
With the default values below, Access Point Density Calculator returns Access Points Required of 12. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Area to coveraccepts 10–500,000 m²
- 2,500 m²
- Design cell radiusaccepts 2–200 m
- 12 m
- Cell overlap allowanceaccepts 0–80 %
- 20 %
- Concurrent clientsaccepts 1–200,000 clients
- 300 clients
- Target clients per radioaccepts 1–200 clients
- 25 clients
Results
- Access Points Required
- 12
- Coverage-Driven AP Count
- 7
- Capacity-Driven AP Count
- 12
- AP Density
- 0.48 APs per 100 m²
- Limiting Factor
- Capacity-driven — client load sets the AP count
Step by step
- 1Values used
- 2Access Point Density
- 3Access Points Required= 12
- 4Coverage-Driven AP Count= 7
- 5Capacity-Driven AP Count= 12
- 6AP Density= 0.48 APs per 100 m²
- 7Limiting Factor= Capacity-driven — client load sets the AP count
Assumptions and limits
- The result is derived only from the 5 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 2 decimal places, 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 is Access Point Density calculated?
coverage APs = area ÷ (π·r²·(1 − overlap)); capacity APs = clients ÷ clients per radio; the design count is the larger of the two. A circular cell of radius r covers π·r², but neighbouring cells must overlap for roaming, so only part of that area counts towards the floor plate. Dividing the area by the usable cell area gives the coverage count, dividing the client population by the per-radio target gives the capacity count, and the design must satisfy both.
Why does Access Point Density matter?
Designs that only count coverage look fine on a heatmap and then collapse at 09:00 when every desk associates at once; designs that only count capacity leave dead corners.
What values do I need to enter?
This calculator takes 5 inputs: Area to cover, Design cell radius, Cell overlap allowance, Concurrent clients, Target clients per radio. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.