How to check Wi-Fi signal strength on Windows

Short answer: Windows shows the signal in the tray icon, but only as 4 bars and with no history — for the real number run netsh wlan show interfaces and look at the Signal line. A free app like Wi-Fi Signal Monitor turns that same reading into a live 2-minute graph in percent, with a quality word and a spot-finding walk-around mode.

What affects Wi-Fi signal

  • Walls and distance. Every wall between you and the router costs signal — the more, and the thicker, the worse. Even a fish tank, a mirror or a metal cabinet in the line of sight can take a visible bite.
  • 2.4 vs 5 GHz. 5 GHz is faster but loses strength sooner through walls; 2.4 GHz reaches farther and penetrates better. Fast but weak 5 GHz is why the same laptop can struggle in the kitchen and fly in the room next to the router.
  • Neighbouring networks. Nearby access points use the same airwaves and add noise; in a block of flats the signal is usually worse in the evening, when everyone is online.
  • Channel congestion. All networks in the same band share channels; when several sit on one channel, throughput falls even if the signal looks strong. Switching the router to a free channel helps more than moving furniture.

Method 1: the tray icon (quick, but coarse)

  1. Hover the Wi-Fi icon in the taskbar — Windows shows the network and a rough percentage.
  2. Or open Settings → Network & internet → Wi-Fi to see the same figures.

The catch: the icon shows only 4 bars, so “good” and “excellent” look alike; there is no history at all. A dip that lasts two seconds — exactly the kind you feel in a video call — is gone before you look.

Method 2: netsh wlan show interfaces (exact, but one-shot)

  1. Open Command Prompt or Windows Terminal — no admin rights needed for this command.
  2. Run:
netsh wlan show interfaces
  1. Find the Signal line in the output: it shows the exact percentage for the current connection. The same block lists SSID, BSSID and receive/transmit rates.

Useful for a single check, inconvenient for monitoring: you have to remember the command, and each run is a snapshot in the console — there is nothing to watch when you walk from room to room.

Method 3: Wi-Fi Signal Monitor — a live graph, sampled every second

Download free — WifiSignalMonitor-Setup.exe

  1. Open the app — the current signal appears in percent within a second, and the graph starts filling in.
  2. Watch the last 2 minutes — one sample per second, with the level in percent and as Excellent, Good, Fair or Poor, plus SSID, BSSID and Rx/Tx speeds.
  3. Walk around with the graph open and note where the line drops 10–20%; that is exactly where to move the router or your desk.

The readings come from the same built-in netsh command, run locally once a second — no administrator rights needed, no network traffic, nothing sent anywhere. The app works with the internet off and leaves nothing behind when closed.

How to find the best spot for the router or laptop

  1. Walk slowly with the graph open — one lap around the flat is enough to see which rooms keep the line high and which lose it behind a wall.
  2. Watch for drops of 10–20% — the single most useful pattern; a dip of that size is where video calls stutter, and moving a metre or a shelf usually fixes it.
  3. After moving furniture or the router, check again — a new wardrobe or a repositioned router changes the map, and the graph shows the result in seconds.

FAQ

Which signal percentage is good?

Above roughly 70% is comfortable for streaming and calls, 50–70% is workable, and below 50% you will feel it in large transfers. Rather than chasing a single number, watch stability: a steady 60% beats a line that jumps between 40% and 90%.

Why does the tray icon show full bars while the connection is still slow?

Bars are a coarse signal reading, and they say nothing about congestion: a strong signal on a busy channel is still slow. Signal strength is only one half of the story — channel load is the other, which is why the evening slowdown happens with full bars.

Do I need administrator rights to read the Wi-Fi signal?

No. netsh wlan show interfaces works under a normal user account, and so does Wi-Fi Signal Monitor — it reads the level through the same netsh command once a second and needs no elevation.

More: how to see all devices on your Wi-Fi network and how to find a saved Wi-Fi password on Windows.

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