Typical Speed Gaps by Scenario
| Scenario | Ethernet Throughput | Wi-Fi Throughput | Notes |
|---|---|---|---|
| Same room, 5 GHz Wi-Fi 6 | 90–95% of plan | 70–90% of plan | Gap is small at close range |
| Adjacent room, 5 GHz | 90–95% of plan | 50–75% of plan | Wall attenuation begins |
| Two rooms away, 5 GHz | 90–95% of plan | 30–60% of plan | Significant throughput loss |
| 2.4 GHz, congested apartment | 90–95% of plan | 20–40% of plan | Channel congestion is severe |
| Any distance, jitter comparison | 0.1–1ms jitter | 2–30ms jitter | Ethernet always wins on consistency |
How to Run an Accurate Comparison
- Connect your device to Ethernet and run a speed test. Note download, upload, ping, and jitter.
- Disconnect Ethernet and connect to Wi-Fi from the same location. Run the same speed test immediately.
- Compare all four metrics—not just download. The jitter and ping differences often reveal why Wi-Fi underperforms for specific applications even when download speed looks similar.
- Try the Wi-Fi test on both 2.4 GHz and 5 GHz if your router broadcasts separate SSIDs. The band difference is often the largest factor.
When Wi-Fi Is Good Enough
For browsing, HD streaming, and casual video calls, Wi-Fi delivering 30–50+ Mbps is perfectly adequate. The gap with Ethernet only becomes practically significant for: gaming (where jitter above 10ms causes lag), video calls with marginal upload speed (where Wi-Fi overhead pushes you below the threshold), large file transfers (where speed translates directly to time), and plan speeds above 500 Mbps (where Wi-Fi overhead eats a larger absolute amount of bandwidth).
When Switching to Ethernet Is Worth the Effort
If your Wi-Fi speed test shows under 50% of your plan speed, or if jitter is above 15ms, Ethernet will make a noticeable practical difference. The most impactful switches are for game consoles, desktop computers, smart TVs used for 4K, and work laptops on video calls. Phones and tablets are harder to wire and usually fine on Wi-Fi.
Frequently Asked Questions
Is Ethernet always faster than Wi-Fi?
On gigabit Ethernet, yes in terms of throughput and always in terms of consistent latency. Wi-Fi varies from 40–90% of plan speed depending on band, distance, and interference.
When does the Wi-Fi vs Ethernet gap actually matter?
It matters for gaming, video calls, and large file transfers. For browsing and HD streaming, Wi-Fi at 30+ Mbps is usually adequate. The gap is more significant on fast plans (500 Mbps+).
Why is my Wi-Fi speed much lower than Ethernet?
Common causes: 2.4 GHz congestion, distance from router, wall attenuation on 5 GHz, or interference from nearby electronics. Testing on both bands reveals which is the issue.