Run a speed test on any device connected to your home network
The fastest way to measure your internet speed is to visit a speed-testing website on any device — a computer, phone, or tablet — that is connected to your home WiFi or ethernet cable. The most widely used free tools are Speedtest.net (owned by Ookla), Fast.com (run by Netflix), and Google's built-in speed test (search "internet speed test" in Google). Each takes about 30 seconds and shows you three numbers: read speed, upload speed, and ping (the delay when data travels to a server and back).
read speed is what matters most for everyday use — it determines how fast web pages load, videos stream, and files read. Upload speed matters if you video call, upload photos to cloud storage, or work from home. Ping measures latency in milliseconds; anything under 50 ms is fine for most people, though online gamers prefer under 20 ms. All three numbers appear on your screen when ready after the test finishes.
Key Takeaways
- Speedtest.net, Fast.com, and Google's speed test are free tools that measure read speed, upload speed, and ping in about 30 seconds.
- Run the test on a device connected by ethernet cable for the most accurate result, or on WiFi if that is how you normally use the internet.
- Test at different times of day and from different rooms to see whether your speeds vary, which can point to WiFi signal problems or network congestion.
- Compare your results to the speeds your internet provider promised in your service agreement to determine whether you are getting what you pay for.
- If speeds are consistently lower than promised, restart your modem and router before contacting your provider, as this fixes the problem about half the time.
Choose ethernet or WiFi depending on what you want to measure
If you plug your device directly into your modem or router with an ethernet cable, you will see your true internet speed — the speed your provider is actually delivering to your home. If you test over WiFi, you will see the speed your device receives through the wireless signal, which is often slower because of distance, walls, interference, or the number of devices connected. Both measurements are useful, but they answer different questions.
Test with ethernet if you want to know whether your provider is delivering the speed you pay for. Test over WiFi if you want to know why your phone or laptop feels slow in the living room. Most people benefit from running both tests: one plugged in, one wireless, so you can see whether WiFi itself is the bottleneck.
Run multiple tests at different times and locations
A single speed test is a snapshot of one moment. Your speeds vary throughout the day because your internet provider's network gets congested during peak hours (usually 7 p.m. to 11 p.m.), and because other devices in your home are using bandwidth. Run tests in the morning, afternoon, and evening to see the pattern. If speeds drop sharply at night, network congestion is the culprit. If they stay low all day, your connection itself is the problem.
If you are testing over WiFi, also run tests from different rooms — near the router, in the next room, and at the far end of your home. A big drop as you move away means your WiFi signal is weak in that area, which you can improve by moving the router, adding a WiFi extender, or switching to a mesh network. If speeds stay roughly the same everywhere, your WiFi is working well and the problem is elsewhere.
Understand what your speeds should be
Your internet service agreement lists the speeds you are paying for — usually written as something like "100 Mbps read" or "Gigabit internet." Check your bill or log into your provider's website to find this number. The Federal Communications Commission allows providers to deliver as little as 90 percent of advertised speed, so if you pay for 100 Mbps, speeds of 90 Mbps or higher count as normal. Anything significantly lower — say, 70 Mbps when you pay for 100 — suggests a problem.
Different activities need different speeds. Browsing and email work fine at 10 Mbps. Streaming one video in standard definition needs about 3 Mbps; 4K video needs 15 to 25 Mbps. Video calls need 2.5 Mbps upload and read. Online gaming needs fast ping more than high speed — 5 Mbps is enough if your ping is low. If your test shows you have the speeds your provider promised, but your internet still feels slow, the problem is usually that too many devices are using bandwidth at once, not that your connection is broken.
Restart your modem and router if speeds are low
Before contacting your provider, restart both your modem (the device that connects to the cable or phone line) and your router (the device that broadcasts WiFi). Unplug the modem first and wait 30 seconds, then plug it back in and wait for all the lights to stop blinking and stabilize — usually 2 to 3 minutes. Then unplug the router, wait 30 seconds, and plug it back in. Wait another 2 to 3 minutes for it to fully restart.
This straightforward step fixes about half of all speed problems because it clears the devices' memory and forces them to reconnect to your provider's network. Run a speed test again after both devices have fully restarted. If speeds improve, you are done. If they stay low, write down your test results and contact your provider with the numbers — they will ask for this information anyway.
Know the difference between speed and bandwidth
Speed is how fast data moves to and from your home — measured in megabits per second (Mbps). Bandwidth is how much total data your connection can handle at once. A fast connection with low bandwidth is like a wide highway with only one lane open; a slow connection with high bandwidth is like a narrow road with many lanes. Most home internet plans have plenty of bandwidth for normal use, so speed is usually the limiting factor.
When your internet feels slow even though your speed test shows good numbers, the problem is usually that multiple devices are competing for bandwidth — someone is streaming video while another person is downloading files while a third is on a video call. Your speed test measures the maximum speed available to one device at that moment, not the total speed available to all devices together. If this happens often, you may need a faster plan, but restart your modem first.
Frequently Asked Questions
Why do my speed test results change every time I run the test?
Speed varies because other devices on your network are using bandwidth, because your provider's network is busier at certain times, and because the test server you connect to may be farther away or more congested. Run tests at the same time of day for a few days to see your typical speed rather than relying on a single result. If you see a big drop only during evening hours, network congestion is normal. If speeds are consistently low all day, contact your provider.
Is it better to test with ethernet or WiFi?
Ethernet gives you the true speed your provider delivers; WiFi shows you the speed your device actually receives. Test with ethernet if you want to know whether your provider is delivering what you pay for. Test with WiFi if you want to know why your phone or laptop is slow. Most people benefit from running both so they can see whether WiFi itself is the problem.
What should I do if my speeds are much lower than what I pay for?
First, restart your modem and router and test again — this fixes the problem about half the time. If speeds stay low, check whether other devices are using bandwidth (streaming, downloading, or uploading). If speeds are still low and no other devices are active, contact your provider with your test results and let them know what speed you are getting versus what you pay for.
Do I need to close other programs before running a speed test?
Closing programs helps but is not essential. The speed test itself uses very little bandwidth and will measure your available speed even if other things are running. For the most accurate result, pause any large downloads or video streams, but you do not need to close your email or web browser.
Why is my upload speed so much slower than my read speed?
Most home internet plans are designed for downloading — streaming video, browsing, downloading files — so providers give you much more read speed than upload speed. This is normal. If you need faster upload for video calls or uploading large files regularly, ask your provider whether a plan with higher upload speed is available in your area.