MOBA · Riot Games
League of Legends Packet Loss Test
Packet loss is the top cause of League of Legends lag spikes, missed hit-registration and rubber-banding. League of Legends stays smooth under 0.3% loss; 1% is borderline and above 3% it's effectively unplayable. Test your real UDP loss and bufferbloat below, then work through the fixes.
Good ping, jitter & packet loss for League of Legends
| Metric | Optimal | Good | Playable max | No-go |
|---|---|---|---|---|
| Ping | ≤ 25 ms | ≤ 45 ms | ≤ 70 ms | > 100 ms |
| Jitter | ≤ 3 ms | ≤ 8 ms | ≤ 15 ms | > 30 ms |
| Packet loss | 0% | ≤ 0.3% | ≤ 1% | > 3% |
Low bandwidth; ping+jitter dominate. Jitter punishes click-to-move precision.
How to fix League of Legends packet loss
- 1. Use a wired Ethernet connection
Wi-Fi is the most common source of packet loss and jitter. A cable to the router removes interference and is the single biggest fix for most League of Legends players.
- 2. Enable SQM / QoS on your router
Smart Queue Management (fq_codel / CAKE) crushes bufferbloat — the lag that appears when the line is busy. Many routers expose this as "QoS" or "anti-bufferbloat".
- 3. Pick the nearest server region
Switch League of Legends to the closest region. A nearer datacenter means lower ping and fewer drops; see the region list on the League of Legends ping test.
- 4. Restart the gateway and rule out the line
Power-cycle the modem/router. If loss persists on Ethernet across servers, the problem is upstream — contact your ISP with the measured loss figures.
League of Legends regions FRAGRATE checks
- NA Central · Ohio / Chicago
- NA East · Virginia
- NA West · Oregon
- EU West · London
- EU Central · Frankfurt
- Korea · Seoul
- Asia SE · Singapore
- Oceania · Sydney
- LATAM North · Mexico City
- SA East · São Paulo
How FRAGRATE measures this
FRAGRATE measures ping and jitter as a TCP-handshake to a public endpoint in each game region, packet loss via UDP/WebRTC, and bufferbloat as the latency added while your line is saturated. Run it locally for true per-region game-server ping, or use the hosted browser test for ping, loss and bufferbloat.
FAQ
- How much packet loss can League of Legends tolerate?
- Keep packet loss under 0.3%. Between 0.3% and 1% is borderline; above 3% League of Legends is effectively unplayable.
- Why does League of Legends lag when someone else is streaming?
- That's bufferbloat — latency that piles up when your connection is saturated. A fast line can still spike to hundreds of ms under load, so League of Legends stutters mid-fight. FRAGRATE measures latency-under-load to catch it.
- Does jitter matter for League of Legends?
- Yes — keep jitter under 8 ms for League of Legends (MOBA). Above 30 ms you get inconsistent hit registration and rubber-banding even when average ping looks fine.
- What is a good ping for League of Legends?
- Aim for under 45 ms; under 25 ms is optimal for League of Legends. Up to 70 ms is the playable ceiling, and above about 100 ms League of Legends feels laggy.