How to test Wi-Fi with doors open and closed

You may be planning to remove an interior door, or wondering whether an open doorway would improve a weak Wi-Fi spot. Testing the same locations with doors closed and open can show whether the change makes a useful difference before you commit.

Use the Wi-Fi Map to compare connection quality around your home. It measures how the connection responds, including response time, jitter, and lost requests. It does not read the router's radio signal strength directly.

Compare the same rooms with doors open and closed

1. Open the Wi-Fi Map on the device you will use for every measurement. Connect to the same Wi-Fi network throughout the test.
2. Choose a few fixed spots, such as the center of the hallway and a desk beyond the doorway. Keep the device at the same height and in the same position each time. Mark the locations with a small piece of tape if needed.
3. With the doors closed, measure each spot. Note which room and doorway you tested, along with the response time, jitter, and any lost requests the tool reports.
4. Open the doors you are considering removing. Repeat the measurements at the exact same spots, without moving the router or changing the device's orientation.
5. Repeat both sets once or twice more. Compare the repeated results, not just one reading, because other network activity can change a measurement from moment to moment.

Keep the test conditions as similar as possible. Pause downloads, video calls, and streaming on your own devices. If another person is using the network, note that, and try again later if the readings vary widely. Avoid testing one condition during a quiet hour and the other while the household is streaming.

What the results mean

The open-door readings improve consistently

If response time and jitter are lower, and fewer requests are lost, with the doors open across repeated tests, the doors may be contributing to the weaker connection. An open door is a useful estimate of the effect of removing the door, but it cannot reproduce every detail of a permanent opening. The frame and nearby wall will still be there.

The readings barely change

The doors probably are not the main cause of poor Wi-Fi in those spots. The router's distance, the walls, floors, appliances, or interference from nearby networks may matter more. Removing the doors is unlikely to solve a problem that stays the same when they are open.

The results vary from one run to another

That does not prove that the door has no effect. Network use and wireless interference can change during a test. Repeat the comparison at a quieter time, and check whether the same condition performs better in most runs rather than relying on the best result.

Connection quality looks similar, but downloads still feel slow

This comparison is about the connection between your device and the test server, not a direct measure of Wi-Fi radio strength. A slow internet plan, busy network, or provider problem can affect how online activity feels even when the room-to-room readings are similar.

How to make the comparison more reliable

1. Use the same device and network. Different devices can have different Wi-Fi antennas and may connect differently. On Windows 11, check the connected network under Settings › Network & internet › Wi-Fi. On macOS, check System Settings › Wi-Fi. On an iPhone, check Settings › Wi-Fi. Android menu names vary, but Wi-Fi is usually under Settings › Network & internet or Settings › Connections.
2. Keep the router in one place. Do not reposition it between the closed-door and open-door runs. If it is moved, you will be testing two changes at once and will not know which made the difference.
3. Measure fixed points, not whole rooms at random. A reading a few feet closer to the router can look better even if the door made no difference. Use the same marked spots each time.
4. Test all relevant doors in a consistent way. If you are thinking of removing two doors, test both open together, then try each one open by itself. That can show which doorway, if any, has the clearest effect.
5. Look for a repeated pattern. Compare the typical readings across runs. A single low response time or a single lost request is not enough to judge coverage.

What a browser Wi-Fi test can tell you

Browsers cannot read Wi-Fi signal strength in dBm, a radio measurement often shown by router or network utilities. The Wi-Fi Map instead checks how the connection behaves by measuring response time, jitter, and lost requests. Those results are useful for comparing two conditions on the same device, but they do not identify the exact wall, door, or source of interference responsible for a change.

Doors can affect wireless signals differently depending on their material and construction. A hollow wood door may have little effect, while a heavier door or nearby wall may matter more. If opening the doors makes little difference, try measuring with the router in a more central, elevated position before deciding that the building needs a permanent change.