Mesh Wi-Fi Node Planner

Why a single router stops being enough

Every home has Wi-Fi dead zones: the corner of the bedroom where video calls freeze, the kitchen where pages crawl, the balcony that drops off entirely. A single router broadcasts from one spot, and its signal weakens with distance and every obstacle it meets. Thick walls, concrete floors, mirrors, and even large metal appliances all eat into the signal, so the further a room is from the router, the slower and less stable the connection becomes.

A mesh Wi-Fi system solves this by replacing that one lonely box with several nodes that work together as a single network. Each node talks to its neighbours, and your phone or laptop connects to whichever node is closest as you move around the house. There is no switching between separate networks — it behaves like one big blanket of coverage. The tricky part is knowing how many nodes that blanket needs, which is exactly what this planner figures out.

How the planner estimates your node count

The estimate starts from a simple, honest baseline: a typical modern mesh node covers around 150 square metres of open space. Real homes are not open fields, though, so the planner adjusts for what actually blocks signal. Every interior wall eats a slice of that coverage — roughly 10% per drywall or light partition, and about 20% per brick or concrete wall, applied compounding for each wall between rooms.

The calculation is done separately for each floor, because Wi-Fi travels poorly between floors: a node downstairs does little for the room directly above it. Your home's total area is divided by the number of floors, the effective per-node coverage is reduced by the wall factor, and each floor gets the rounded-up number of nodes it needs. A minimum of one node per floor always applies, and the ideal node spacing is estimated from the square root of the area each node must cover, capped at about 10 metres for a healthy backhaul link.

Worked example: a 180 m² two-storey home

Take a 180 m² two-storey home with three drywall walls per floor. First, the area per floor is 180 ÷ 2 = 90 m². Each node covers 150 m² of open space, but three drywall walls reduce that to 150 × 0.9 × 0.9 × 0.9 ≈ 109 m² of effective coverage. Dividing the floor area by the effective coverage: 90 ÷ 109 ≈ 0.83, which rounds up to 1 node per floor — so 2 nodes in total. The ideal spacing works out to the square root of 90 ÷ 1 ≈ 9 metres.

In plain terms: a 2-node mesh kit covers this house, with one node on each floor about 9 metres apart. Change those drywall walls to brick, and the effective coverage drops to 150 × 0.8³ ≈ 77 m² per node — still 1 node per floor here, but much less headroom. Add a few more walls or a bigger footprint and the third node starts to earn its place.

Placement tips that make or break mesh performance

Node count only tells half the story — where you put the nodes matters just as much. Place nodes centrally in the areas they serve rather than at the far edges of the house, and keep them at roughly chest height on a shelf or table: hiding a node behind the TV or low on the floor wastes half its signal. Aim for nodes roughly 8 to 10 metres apart with as clear a line of sight as possible, avoiding thick walls directly between two nodes.

If your home is wired with Ethernet, use it: connecting at least one satellite node with a cable (a wired backhaul) keeps speeds high even when the network is busy, and is the single biggest upgrade you can make to a struggling mesh system. Finally, keep the main node close to your ISP modem or fibre terminal so it gets a clean, fast feed to share with the rest of the network. Re-run the planner whenever you move, renovate, or change wall materials to check whether your node count still fits.