What is the difference between Wi-Fi 5, Wi-Fi 6 and Wi-Fi 7?

They are successive generations of the 802.11 standard, and the practical differences are less about peak speed than about how well the network copes with many devices at once.

Wi-Fi 5 (802.11ac), from 2013. Operates on 5GHz only for its main features. Introduced wider channels and multi-user downlink MIMO. Still perfectly adequate for most single-user browsing and streaming.

Wi-Fi 6 (802.11ax), from 2019. The headline speed increase is modest; the real advance is efficiency in crowded environments.

OFDMA divides a channel into subcarriers so several devices share one transmission rather than queuing for exclusive turns. This is the single biggest change and it substantially reduces latency when many devices are active.

Uplink and downlink MU-MIMO, so multiple devices transmit simultaneously.

Target Wake Time, letting battery devices sleep on a schedule — significant for smart home sensors.

WPA3 security.

Wi-Fi 6E is Wi-Fi 6 extended into the 6GHz band — a large block of clean spectrum with no legacy devices on it. In practice this often matters more than the generation itself, because interference rather than protocol is usually the limiting factor.

Wi-Fi 7 (802.11be). Adds 320MHz channels (double Wi-Fi 6E), 4K-QAM for denser data encoding, and most importantly Multi-Link Operation (MLO) — a device can use two bands simultaneously, aggregating them for speed or using one as a fallback for reliability. MLO is the genuinely new capability.

What actually limits your speed in most homes: your internet connection, not the Wi-Fi. Upgrading a router to Wi-Fi 7 on a 100 Mbps line changes nothing.

Both ends must support the standard. A Wi-Fi 7 router with Wi-Fi 5 devices delivers Wi-Fi 5 to them.

Coverage is unchanged or worse at higher frequencies — 6GHz penetrates walls poorly.