← Back to Tutorials 📶 Internet

Why Is My Wi-Fi So Slow?

Slow Wi-Fi is one of the most common tech complaints — and most of the time it's fixable without calling your internet provider. Here's how to diagnose and fix it yourself.

⏱ 10 min read 🟡 Intermediate 🌐 Windows & Mac

What you'll accomplish

  • Test your actual internet speed
  • Restart your router the right way
  • Improve your router placement
  • Reduce Wi-Fi interference
  • Know when to call your provider
1

Test your actual speed first

Before assuming your Wi-Fi is slow, check what speed you're actually getting versus what you're paying for. This tells you whether the problem is your Wi-Fi or your internet plan.

  • Go to fast.com or speedtest.net in your browser
  • Click Go or Start and wait for the test to complete
  • Note your Download and Upload speeds
  • Compare to what your plan promises — check your internet bill or provider's website
📸

Screenshot: Speedtest.net results showing download and upload speeds

💡

Tip: Run the test both on Wi-Fi and with a wired ethernet cable plugged in. If wired is fast but Wi-Fi is slow, the problem is your Wi-Fi. If both are slow, the issue is your internet connection or router.

2

Restart your router properly

Routers need to be restarted occasionally to clear memory and refresh connections. Many people never restart theirs.

  • Unplug your router's power cable from the wall
  • Wait a full 60 seconds — not just a few seconds
  • Plug it back in and wait 2–3 minutes for it to fully reconnect
  • Reconnect your devices and test speed again
⚠️

Note: If your internet provider gave you a combined modem/router unit, unplug that device — not just a separate router. Some homes have both a modem and a separate router; unplug both, start with the modem, wait 60 seconds, then plug in the router.

3

Move your router to a better spot

Where you place your router makes a huge difference to Wi-Fi speed and coverage. Most people put their router in the worst possible spot.

  • Place it centrally in your home, not in a corner or cupboard
  • Keep it elevated — on a shelf or table, not on the floor
  • Keep it away from thick walls, concrete, and metal objects
  • Keep it away from microwaves and cordless phones which interfere with the 2.4GHz band
  • Don't put it inside a cabinet or behind your TV
📸

Screenshot: Diagram showing good vs bad router placement in a home

💡

Tip: Wi-Fi signal travels outward in all directions. Placing the router in the centre of your home means the signal reaches everywhere more evenly.

4

Switch between 2.4GHz and 5GHz

Most modern routers broadcast two Wi-Fi networks — 2.4GHz and 5GHz. They behave differently and suit different situations.

  • 5GHz — faster speeds but shorter range. Use this when you're close to the router
  • 2.4GHz — slower but reaches further and penetrates walls better. Use this in other rooms or floors
  • Your router may show both as separate network names (e.g. "HomeWifi" and "HomeWifi_5G")
  • Connect to 5GHz if you're nearby and having speed issues
  • Switch to 2.4GHz if your signal keeps dropping in certain rooms
📸

Screenshot: Wi-Fi network list showing both 2.4GHz and 5GHz networks

5

Check what's using your bandwidth

Sometimes Wi-Fi feels slow because another device or program is using up all the bandwidth. Downloads, video streaming, and backups can all slow things down for everyone else on the network.

  • On Windows press Ctrl + Shift + Esc to open Task Manager
  • Click the Network column to sort by network usage
  • Look for anything using a high percentage — it may be a background update or backup
  • Check if anyone else in the house is streaming video in 4K or downloading large files
📸

Screenshot: Task Manager showing network usage by application

6

When to call your internet provider

If you've tried everything above and your speed is still well below what your plan promises, it may be time to call your provider.

  • Call them and say: "I ran a speed test and I'm getting X Mbps but my plan promises Y Mbps"
  • Ask them to run a line test from their end
  • Ask if your modem/router is outdated and needs replacing — providers often supply old equipment
  • If the problem is intermittent, note the times of day it's slow — this helps them diagnose congestion issues
💡

Tip: Having specific speed test numbers ready before you call makes the conversation much more productive. Screenshot your results from fast.com so you have evidence.

← Previous: Setting Up Gmail Back to All Tutorials →