What actually slows down your internet, and what you can fix

Internet speed depends on three separate things: the speed your provider sells you, the condition of the line running to your house, and what is happening on your devices and network right now. Most people can increase their speed by fixing the second and third — without paying more to their provider.

Your provider advertises a speed like "100 Mbps" (megabits per second). That is the maximum the line can carry under ideal conditions. You almost never see that number in real life because of interference, distance from the equipment, and other devices using the same connection. The gap between what you pay for and what you actually get is normal.

Before you call your provider or upgrade your plan, check whether the problem is on your end. A speed test — run at speedtest.net or fast.com — tells you what you are actually getting right now. If it is much lower than what you pay for, something is wrong. If it matches your plan, the slowness you feel is usually caused by something else.

Key Takeaways

  • Restart your modem and router by unplugging them for 30 seconds, which fixes most temporary slowdowns without any other work.
  • Move your router to a central, elevated location away from walls and metal objects, since distance and obstacles block the wireless signal.
  • Check how many devices are connected and using data — streaming video, downloads, and online games consume most of your bandwidth even when you are not actively using them.
  • Run a speed test at speedtest.net to see what you are actually getting, then compare it to what your bill says you should receive.
  • If your speed test matches your plan but things still feel slow, the problem is usually on your device or network, not your internet connection.

Restart your modem and router first

Unplug your modem (the device your provider installed) for 30 seconds, then plug it back in. Wait for all the lights to stop blinking and settle into a steady pattern — usually two to three minutes. Then do the same with your router (the wireless device that broadcasts WiFi).

This clears temporary errors that build up over time and is the single most effective fix for slowdowns. Most internet problems resolve after a restart. If your speed improves noticeably, you are done. If not, move to the next step.

Position your router for better wireless range

WiFi travels in straight lines and bounces off walls, which weakens the signal the farther you get from the router. Metal objects, microwaves, and cordless phones also interfere. Move your router to a central location in your home, elevated off the floor — a shelf or wall mount works better than sitting it on the ground.

Keep it away from metal filing cabinets, refrigerators, and exterior walls. If your router is in a back corner of your house and you use WiFi in the front, you are fighting physics. Moving it to the middle of your home often feels like a speed increase because the signal is stronger where you actually use it.

If moving the router is not practical, a WiFi extender or mesh system can help, though both add cost. A mesh system (like Eero or Netgear Orbi) replaces your single router with multiple units that work together. An extender (like a TP-Link or Netgear range extender) picks up the existing signal and rebroadcasts it, but usually at reduced speed.

Check what is using your bandwidth right now

One device streaming video, downloading files, or running online backups can slow everything else to a crawl. Open your router's settings to see what is connected. Most routers have a web address printed on the back — something like 192.168.1.1 — that you type into a browser to log in.

Look for a section called "Connected Devices" or "DHCP Clients." You will see a list of everything on your network — phones, computers, tablets, smart speakers, security cameras, and anything else that connects to WiFi. Disconnect devices you do not recognize or are not using right now.

Also check whether any of your own devices are running large downloads or backups in the background. On Windows, open Task Manager and look at the Network tab. On Mac, open Activity Monitor and click the Network tab. Look for anything showing high activity. Pause or cancel downloads and backups, then test your speed again.

Switch to a wired connection if you need speed right now

WiFi is convenient but slower and less stable than a cable plugged directly into your modem or router. If you are doing something that demands speed — uploading large files, video conferencing, or online gaming — plug an ethernet cable from your computer into your router. The difference is often noticeable.

Most laptops no longer have an ethernet port, so you may need a USB adapter (around $15 to $30). Desktop computers usually have a port built in. This is not a permanent solution for most people, but it is useful when you need reliability.

Know when to contact your provider

If your speed test shows you are getting significantly less than what your bill promises — say you pay for 100 Mbps but consistently see 40 Mbps or lower — contact your provider. Run the test a few times at different times of day, and write down the results. Providers often ask for this information.

Before you call, have your account number ready and know what speed tier you pay for. Tell them your speed test results and ask them to check the line from their end. They can see whether the problem is on their network or on your property. If it is on their side, they may send a technician or upgrade your connection at no charge.

If the problem is on your property — a damaged cable, old wiring, or a modem that is too old — you may need to pay for repairs or equipment. Ask what the cost is before you agree.

Understand the difference between speed and performance

A fast internet connection does not automatically make everything feel fast. A slow website loads slowly even on fast internet. A video call that keeps freezing is usually a problem with your device or the other person's connection, not yours. Lag in online games depends partly on your speed but mostly on latency — how long it takes data to travel to the game server and back.

Speed tests measure read and upload speed in Mbps. Latency is measured in milliseconds (ms) and shows up as "ping" on a speed test. For video streaming, you need speed. For gaming and video calls, low latency matters more. If your speed test shows good numbers but things still feel slow, the problem is usually something else — a slow device, a crowded WiFi channel, or the service itself.

Frequently Asked Questions

How much internet speed do I actually need?

For basic web browsing and email, 10 to 25 Mbps is plenty. Streaming video in HD needs about 5 to 10 Mbps per stream. Video calls need 2.5 to 4 Mbps. Online gaming needs at least 5 to 10 Mbps, though the speed matters less than low latency. If multiple people are using the internet at once, add up what each person needs.

Why is my WiFi slower than my wired connection?

WiFi travels through the air and bounces off walls, which weakens the signal. A cable plugged directly into your router has no interference. WiFi also shares bandwidth among all connected devices, while a wired connection is dedicated to one device. Moving closer to the router or switching to a wired connection usually fixes this.

Does restarting my router really help, or is that just what tech support says?

It really helps. Routers build up temporary errors and memory leaks over time. A restart clears these out. Most people who restart their router see an improvement. It is not a permanent fix for underlying problems, but it works for temporary slowdowns and should be your first step.

What is the difference between a modem and a router?

Your modem connects to your provider's network and converts that signal into internet you can use. Your router takes that internet and broadcasts it as WiFi to your devices. Some devices combine both functions into one box. If you have two separate devices, the modem connects to the wall, and the router connects to the modem.

Can I upgrade my router to get faster internet?

A new router will not increase your speed if your provider is already delivering what you pay for. It can improve range and stability, especially if your current router is old. If you are getting the speed you pay for but WiFi feels slow in some rooms, a better router or mesh system may help. If your speed test is low, the problem is your provider or your line, not your router.