ISP Speed vs. Wi-Fi Speed

What It Means

Understanding the distinction between ISP speed and Wi-Fi speed is the single most important diagnostic concept for troubleshooting slow home internet. ISP speed is the throughput your ISP delivers to your modem or ONT, this is what you are actually paying for and what the FCC Broadband Nutrition Label describes. Wi-Fi speed is the throughput your device achieves wirelessly through your router, which is often much lower than the ISP speed due to a stack of home-network bottlenecks. Factors that reduce Wi-Fi speed below ISP speed: router Wi-Fi standard (Wi-Fi 5 caps at 400 to 800 Mbps real-world, Wi-Fi 6 at 1 to 2 Gbps, Wi-Fi 7 at multi-gigabit), distance from the router (signal attenuates roughly 6 dB per drywall wall and 12 dB per brick wall), number of active devices on the network (15 to 30 devices is typical in modern homes), 2.4 GHz versus 5 GHz band selection (2.4 GHz is range-friendly but crowded and slow, 5 GHz is fast but shorter range), interference from neighboring Wi-Fi networks and Bluetooth devices (apartment buildings suffer worst), and client device Wi-Fi capability (older phones and laptops cap Wi-Fi at Wi-Fi 5 or earlier). To diagnose: plug a laptop directly into the modem or ONT via ethernet cable and run a Broadband Grade speed test, if wired speed matches your plan but Wi-Fi tests are slow, the problem is your home network, not your ISP. Industry estimates suggest 60 to 70% of "slow internet" support calls turn out to be Wi-Fi problems, and upgrading from an ISP combo unit to a standalone Wi-Fi 6 router resolves most of them.

Frequently Asked Questions