Xfinity speed test
An independent test for Xfinity customers. Enter your plan speed after the test to see exactly what percentage you're getting — and whether the shortfall is Wi‑Fi or the line.
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Questions about this test
What speeds should I get on Xfinity?
Xfinity cable plans typically range from about 150 Mbps to 2 Gbps download depending on your area, with upload speeds that are much lower on most tiers (often 10–35 Mbps, higher in upgraded markets). Gigabit plans are commonly provisioned slightly above 1,000 Mbps, so a wired test near 940 Mbps is normal.
Why is my Xfinity upload so slow?
Cable networks dedicate far more capacity to download than upload. That's by design, not a fault. If upload matters for you (video calls, backups, streaming), check whether an upgraded tier or fibre is available at your address.
My Xfinity speed is low — what do I check first?
Run a wired test. If it's also low, restart the modem, check the coax connections, and test at a quiet time. If it stays low, ask Xfinity to check signal levels. If wired is fine but Wi‑Fi is slow, the fix is the router or its placement.
Is this the official Xfinity speed test?
No. gbps.run is independent and not affiliated with Comcast. It tests to Cloudflare's nearest server, which is a fair representation of real-world internet performance rather than a test inside the provider's own network.
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