Your Speed Test is Lying to You — Here's How to Fix It

You open Speedtest.net. You hit go. You get a result. You screenshot it and send it to your ISP to complain. And your ISP tells you the numbers look fine on their end.

Here's the problem: if you ran that test on a laptop connected to WiFi, you may have just measured your WiFi speed — not your internet speed. These are different things. And most people have never run an accurate speed test in their lives.

Why WiFi Is the Bottleneck (Not Your Internet)

WiFi is a wireless radio signal. It passes through walls, bounces off furniture, degrades with distance, and competes with every other device on your network. The speed it delivers to your device depends on:

• How far your device is from the router
• How many walls and obstacles are in between
• What WiFi generation your router and device support (WiFi 5, 6, or 7)
• How many other devices are using the network simultaneously
• Interference from neighboring networks

Even a router that should deliver 1 Gig might deliver 200 Mbps to a laptop three rooms away. That's not your internet being slow — that's your WiFi being WiFi.

The Right Way to Test Your Internet Speed

Get an ethernet cable. Plug one end into your router (or directly into your modem), and the other end into your laptop or desktop. On a Mac, ethernet requires a USB-C or Thunderbolt adapter if your machine doesn't have a built-in port.

With an ethernet connection, go to Speedtest.net (Ookla) and run the test. This is now measuring your actual internet connection — not your WiFi. These are the numbers that matter when comparing to your plan.

Other reliable options: Fast.com(Netflix's speed test, very clean and simple) and Google's built-in speed test (search “internet speed test” in Chrome). All three are reliable for download speed. Ookla is the best for getting upload and latency data as well.

What the Numbers Actually Mean

Download speed: How fast data comes to your device. Determines streaming quality, download times, web page loads.

Upload speed:How fast data leaves your device. Determines video call quality, cloud backup speed, file sharing. Most people ignore this — don't.

Ping/Latency: The time (in milliseconds) it takes a signal to travel to a server and back. Under 20ms is excellent. 20–50ms is fine for most uses. Above 100ms causes noticeable lag in video calls and gaming.

Jitter: The variation in latency over time. High jitter (above 20ms) makes video calls unstable and choppy even when average latency is acceptable.

When to Complain to Your ISP

Run the wired test multiple times at different times of day. If your wired speed is consistently more than 20% below your plan speed — for example, consistently below 800 Mbps on a 1 Gig plan — that's a legitimate service issue and worth contacting your ISP about.

Time of day matters significantly for cable internet. Test at peak hours (7–9 PM on a weekday) and off-peak (6 AM on a weekday). If there's a dramatic difference — say, 900 Mbps at 6 AM and 200 Mbps at 7 PM — your neighborhood node is congested. That's an infrastructure issue the ISP should address, and it's worth escalating.

When to Consider Switching

If you've confirmed through wired testing that your internet is consistently underperforming your plan — and your ISP isn't resolving it — the answer probably isn't to keep negotiating. It's to switch.

Competition has improved in most markets. If fiber is available at your address, the performance difference over cable is immediate and measurable. If you're in a cable-only market, checking for newer cable providers (some markets have two cable options) or fixed wireless alternatives is worth doing.

GoodFiber can check what's available at your address in about two minutes. If there's a better option, we'll find it.