ALAVILI is a Coimbatore-based technology company that designs and installs enterprise Wi-Fi for offices, sizing coverage to the actual building rather than defaulting to one access point per floor regardless of layout. "How many access points do we need" sounds like a simple question, but the honest answer depends on floor plan, wall materials, and how many people are actually online at once, not just square footage. Too few access points and the far end of the office is stuck on a weak signal. Too many is money spent on hardware doing nothing useful. Here's a practical way to estimate it properly.
How many Wi-Fi access points does an office actually need?
Most offices need roughly one access point for every 800 to 1,000 square feet of open floor space, adjusted for interior walls, device density and building materials. A single-floor office under that size may need just one placed centrally. Larger or multi-floor spaces need several, positioned according to a coverage survey rather than a guess based on floor area alone.
That range is a starting estimate, not a fixed formula. An open-plan floor with light partitions covers more area per access point than the same square footage broken into cabins, meeting rooms and store rooms, because walls and doors absorb signal and shrink each access point's effective range. The step-by-step method below gets closer to a real number for a specific office than any generic rule of thumb can.
Why does Wi-Fi get weak the farther you are from the router?
Wi-Fi signal strength drops with distance and drops faster once it has to pass through walls, floors, metal cabinets or glass partitions. A single access point's coverage can look strong on a simple floor-area estimate and still fail in practice once real obstacles and interference from other electronics are factored in.
This is why a desk near the router gets fast, stable Wi-Fi while a desk at the far end of the same floor struggles, even though both are technically "covered" on paper. Concrete pillars, lift shafts, metal server racks and even dense stacks of filing cabinets all absorb or reflect signal in ways a simple radius estimate doesn't account for. It's also why moving a router to a "central" spot sometimes doesn't fix a dead zone, if there's a concrete wall or stairwell directly between the router and the affected desks, distance alone was never the real problem.
A step-by-step method to estimate access point count
This is the same basic process used during a proper Wi-Fi coverage assessment, simplified into steps you can work through before ever calling a vendor:
- Get an accurate floor plan of the office, including interior walls, floor-to-floor layout, and any dense obstacles like server racks or storage areas.
- Mark zones by usage intensity, meeting rooms where video calls happen constantly, open desk areas, and low-traffic spaces like storage or corridors.
- Estimate a realistic coverage radius per access point, reducing the theoretical range to account for walls, thick doors and building materials that cut effective signal distance.
- Count concurrent high-bandwidth users per zone, not total headcount, since a meeting room with three people on video calls can strain an access point more than an open desk area of fifteen people doing routine browsing.
- Identify likely dead zones on paper first, corners, stairwells, and rooms sitting behind a lift shaft or a thick structural wall are the usual suspects.
- Run an actual site survey or signal test before finalizing placement, rather than deciding purely from the floor plan, since real-world readings often reveal a gap the paper estimate missed.
This method won't produce an exact number without walking the actual space, but it gets a business close enough to have an informed conversation with whoever ends up doing the install, instead of accepting a flat "one per floor" answer without knowing if that's actually enough.
How many devices can one access point realistically support?
A single access point can technically connect several dozen devices, but performance degrades well before that limit if multiple people are on video calls or transferring large files at once. For steady performance in a working office, planning around a lower concurrent-user load per access point matters more than the device limit printed on the box.
The manufacturer's maximum connection count is measured under ideal lab conditions, not a real office where people are simultaneously joining video calls, syncing files to the cloud, and streaming from personal devices on a guest network. A more realistic planning figure looks at how many people are actively pulling meaningful bandwidth at the same time in a given zone, which is exactly what step four in the estimate method above is for.
What role does office layout play beyond square footage?
Square footage alone underestimates what a Wi-Fi network needs to cover well. Open-plan floors need fewer access points than the same area chopped into cabins, meeting rooms and store rooms, because walls and doors absorb signal. Multi-floor Coimbatore buildings usually need at least one access point per floor regardless of overall size, since Wi-Fi doesn't travel well through concrete floor slabs.
This is also where the cabling behind the access points matters. Every access point needs a proper data run back to a switch, ideally not daisy-chained off another access point, which means Wi-Fi planning and cabling planning really have to happen together rather than as two separate decisions. If the office is still deciding what category of cable to run to each access point location, that's covered in Cat6 vs Cat6a vs Fiber: Choosing the Right Cabling.
