WiFi Speed Test Interpreter
Interpret your speed test results.
See what download, upload, and ping speeds support HD streaming, video calls, gaming, and smart home devices.
Reading your speed test
You ran a speed test and got three numbers. Here is what each one actually decides.
Download is the one everyone quotes, and it is the least interesting once you clear about 100 Mbps. It sets how fast pages and video arrive, and it is shared across every device in the house at once, which is why the calculator above divides it by your device count. What matters is not your total but the slice each device gets during the busy evening hour.
Upload is the number most people never check and the one that ruins video calls. Cable plans typically give you a tenth of your download speed going out. A 400 Mbps cable line with 20 Mbps up will stream 4K flawlessly and still make you look frozen on a work call while a backup runs.
Ping, or latency, is the round-trip delay in milliseconds, and it has almost nothing to do with the other two. Satellite internet can deliver 200 Mbps with a 600 ms ping, which is fine for Netflix and unplayable for anything competitive. Under 20 ms is excellent, under 50 is fine for everything, over 100 is where calls start talking over each other.
What each activity needs, per device:
| Activity | Download needed |
|---|---|
| Web browsing and email | 1 Mbps |
| SD video | 3 Mbps |
| HD video (1080p) | 5 Mbps |
| Video calls | 5 Mbps |
| Online gaming | 10 Mbps |
| 4K video | 25 Mbps |
These match the figures used by the Wi-Fi speed requirement calculator, which works in the opposite direction: it starts from what your household does and tells you which plan to buy.
A slow test does not always mean a slow plan. Before phoning the provider, test again with a laptop plugged straight into the router with an Ethernet cable. If the wired number matches what you pay for, the plan is fine and your Wi-Fi is the bottleneck, which is a much cheaper problem to fix. The tables below cover that side.
Wi-Fi Standard Maximum Speeds:
Advertised “maximum” speeds are theoretical. Real-world performance runs about 40–70% of them, and every device shares the same air.
| Standard | Band | Channel Width | Max Speed | Real-World |
|---|---|---|---|---|
| 802.11n (Wi-Fi 4) | 2.4/5 GHz | 40 MHz | 300 Mbps | 70–130 Mbps |
| 802.11ac (Wi-Fi 5) | 5 GHz | 80 MHz | 866 Mbps | 200–450 Mbps |
| 802.11ac (Wi-Fi 5) | 5 GHz | 160 MHz | 1.73 Gbps | 400–900 Mbps |
| 802.11ax (Wi-Fi 6) | 2.4/5/6 GHz | 160 MHz | 9.6 Gbps | 1–3 Gbps |
| 802.11be (Wi-Fi 7) | 2.4/5/6 GHz | 320 MHz | 46 Gbps | 5–15 Gbps |
Worked Example: Wi-Fi 5 router, 2×2 MIMO (Multiple-Input Multiple-Output, meaning two antennas at each end), 80 MHz channel:
- Single stream: 433 Mbps
- With 2 streams: 866 Mbps theoretical
- Real-world at 5 meters: ~400–500 Mbps
Speed Drops With Distance:
| Distance from Router | Signal Strength | Speed Estimate |
|---|---|---|
| 1–5 m | Excellent | 70–100% max |
| 5–15 m | Good | 40–70% max |
| 15–30 m | Fair | 20–40% max |
| 30+ m / walls | Poor | 5–20% max |
2.4 GHz vs 5 GHz: 2.4 GHz has better range but more interference and congestion. 5 GHz is faster but shorter range. Wi-Fi 6E and Wi-Fi 7 add 6 GHz band (fast, less crowded, shorter range).
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
SuperGlobalCalculator is independently built and maintained. See how we build and verify our calculators.