Why is my internet slow? 10 causes and how to fix it
A slow connection isn't always your ISP's fault. Here are the 10 most common reasons for slowdowns and concrete steps you can take in minutes. Start by measuring — it shows where the problem really is.
Measure your internetMost common causes of slow internet
- Weak Wi‑Fi signal or being too far from the router
- Old router or outdated standard (Wi‑Fi 4/5)
- Too many devices downloading at once
- ISP network congestion during peak hours
- Slow or distant DNS server
- Throttling (ISP intentionally limiting speed)
- Infected computer or background apps
- Damaged cable or bad connection
- VPN or proxy slowing traffic
- Plan speed too low in your contract
How to diagnose it fast
Run a speed test on a wired connection, then over Wi‑Fi. A big gap points to a wireless problem. If both are low, check ping and packet loss — high values mean a stability issue, not bandwidth.
Quick ways to speed things up
- Restart your router and modem (unplug for 30s)
- Change Wi‑Fi channel or switch to 5 GHz
- Set a fast DNS (e.g. 1.1.1.1 or 8.8.8.8)
- Move closer to the router or add mesh/repeater
- Close background downloads and updates
FAQ
Is low ping more important than high download?
For gaming and video calls, yes — low ping and stability matter most. For downloads and streaming, bandwidth (download) matters more.
How do I check if my ISP is throttling me?
Compare results at different times of day and for different services. Consistent drops only for specific services may indicate throttling.