A short checklist for finding out why a connection is slow or unstable.
Work through the connection in layers rather than restarting everything at random. The four checks above narrow the problem to your device, your Wi-Fi, your router or your provider.
Start with the Internet Speed Calculator, use the Bandwidth Calculator for household demand and the Wi-Fi Speed Calculator if coverage is the issue. The full connection guide explains the terms in more depth.
Shared local networks are busiest in the evening. If speeds recover late at night, congestion is a likely cause.
A restart can clear temporary faults. Test from the same place before and after so you can tell whether it helped.
If a wired test on a quiet network stays well below your plan speed at all hours, contact them with your results.
Translate a ping number into a useful verdict for gaming and calls.
Use this toolSee the share of Wi-Fi each active device is likely to get.
Use this toolSee your connection profile from download, upload and ping in plain language.
Use this toolFind your average download speed from a file size and the time it took.
Use this toolMeasure the upload speed you need for backups, livestreams and large attachments.
Use this toolConvert megabits per second (Mbps) to megabytes per second (MB/s) instantly.
Use this toolResults are estimates for planning. Last reviewed 20 September 2026.