How to Properly Test Wi-Fi Speed: Step-by-Step Guide
2026-05-04 9 min readITNET
speedtestwifitutorialtipsdiagnostics
Main Mistake
"My plan is 200 Mbps, Speedtest 30. ISP scams!"
99% — test was wrong, not ISP.
Understand First
- ISP plan = speed to ISP server. 200 Mbps to Tas-IX backbone. EU/US may be 50/0 — not ISP fault.
- Wi-Fi ≠ internet. ISP 200 → LAN 1 Gbps → Wi-Fi 6 5m: 400-700 → 2.4 GHz wall: 50-150.
- Device-dependent. Old laptop = 100-150 max even on top router.
Proper Method
Test 1: ISP speed (bypass Wi-Fi). Ethernet direct to router → Speedtest 3x average. <80% = call ISP. Test 2: Wi-Fi at points. Wi-Fi 6 device, 1m baseline, then bedroom/kitchen/far/bathroom. <30% baseline = problem. Test 3: Multi-device load. 5 devices Speedtest simultaneously. Sum ≈ plan = good. 2-3× less = router bottleneck.Tools
- Speedtest.net — standard
- Nperf.com — EU
- Fast.com — Netflix streaming
- iperf3 — pure LAN/Wi-Fi for techies
iperf3
- Server:
iperf3 -s - Client:
iperf3 -c 192.168.1.10 -t 30
Speedtest hits ISP, iperf3 shows pure Wi-Fi ceiling.
Typical Uzbekistan
| Plan | Tas-IX | Intl | |
|---|---|---|---|
| 100 | 95-100 | 50-90 | |
| 200 | 180-200 | 80-150 | |
| 500 | 400-500 | 100-300 |
Real Wi-Fi Speeds
| Standard | 1m | Wall | |
|---|---|---|---|
| Wi-Fi 4 2.4 | 30-60 | 10-25 | |
| Wi-Fi 5 5 | 200-400 | 50-150 | |
| Wi-Fi 6 5 | 400-800 | 100-300 | |
| Wi-Fi 6E 6 | 600-1200 | 100-200 |
Slow Causes
- Old device chip
- Stuck on 2.4 GHz
- Crowded evening channel
- Antivirus HTTPS
- VPN
- Defender SmartScreen
Complain to ISP When
✓ Ethernet test <80%
✓ Constant
✓ Reboot done
✓ No CRC errors
✗ Wi-Fi slower than ethernet
✗ Peak slowdown
✗ EU slower (peering)
✗ VPN slower
Bottom Line
90% "slow internet" = old Wi-Fi standard, far testing, old device, 2.4 GHz.
Wi-Fi catalog | Contact