A WiFi Coverage Estimator helps you get a quick sense of how far your wireless signal may reach in a home, office, yard, or open workspace. Instead of guessing whether one router can cover the whole area, you can compare frequency bands, account for walls, and see how signal strength changes the expected range.
This calculator estimates both coverage radius in meters and total coverage area in square meters using a simplified propagation model. It factors in whether you're using 2.4 GHz or 5 GHz, whether the space is indoor or outdoor, and how many walls or obstacles may weaken the signal along the way.
If you're setting up a new network, troubleshooting dead zones, or deciding where to place a router, a WiFi range calculator can save time. It won’t replace a site survey, but it does give you a realistic starting point for planning. For homeowners, remote workers, and small offices, that kind of estimate is often enough to make smarter decisions before buying extenders, mesh systems, or additional access points.
It’s best thought of as a planning estimate, not a field measurement. The calculator uses a simplified model based on band, area type, obstacle count, and signal strength, which makes it useful for quick comparisons and rough layouts. Real coverage can change quite a bit depending on building materials, router antenna design, client device quality, interference from nearby networks, furniture, doors, and even where the router is placed.
In general, 2.4 GHz travels farther and handles obstacles a little better, which is why it often provides broader coverage. 5 GHz can offer faster speeds in many situations, but it tends to lose strength more quickly over distance and through walls. That’s why the estimator gives 2.4 GHz a larger base radius and applies a different obstacle reduction rate for each band.
dBm is a way to describe radio signal power. In this tool, -30 dBm is used as the default reference point, and weaker values reduce the estimated range. For every 10 dBm below -30, the tool lowers coverage by 5%, which gives you a simple way to reflect lower transmit power or a less favorable signal starting point without making the calculator overly technical.