How to check your computer's Wi-Fi speed: step-by-step instructions with tests and tips

Slow internet on your computer is one of the most annoying problems users face. You're trying to download a file, watch a video, 4K or play online, but the page freezes and the download speed barely reaches 1 MbpsBefore calling your ISP or buying a new router, It is necessary to objectively measure the actual Wi-Fi speed — the problem may lie in network settings, interference, or even viruses on your PC.

In this article we will look at 5 Reliable Ways to Test Wi-Fi Speed — from simple online tests to professional utilities that will show not only the speed, but also the stability of the connection, delays (ping) and packet loss. You'll learn how to distinguish router issues from ISP-related problems, and what to do if your speed is lower than what's advertised in your plan.

⚡ Spoiler: If your Wi-Fi is operating at a frequency 2.4 GHz, and your neighbors are using the same channels—the speed can drop by 2-3 times, even with a good plan. You can check this using a network analyzer (more on that in the utilities section).

1. Online services for quick speed testing

The easiest way is to use free online services. They work directly in your browser, require no installation, and display three key parameters:

  • 📊 Download speed - how quickly data arrives to your PC (measured in Mbps or MB/s).
  • 📤 Upload speed — how fast you can send data (important for streaming, video calls, cloud backups).
  • 🕒 Ping — server response delay (critical for online games and video calls).

The most popular services:

  • 🌍 Speedtest.net (from Ookla) - a benchmark test with server selection and measurement history.
  • 📡 Fast.com (from Netflix) is a minimalistic test optimized for checking streaming speed.
  • 🛡️ Speed.Yandex — a Russian service with IPv6 support and connection quality analysis.

To get accurate results:

  1. Close all programs that use the Internet (torrents, cloud synchronization, online games).
  2. Connect to the router via cable (Ethernet) or make sure that there are no sources of interference (microwaves, cordless phones) near the PC.
  3. Run the test 2-3 times at different times of the day (speed is often lower in the evening due to the provider’s network load).
📊 Which speed test service do you use most often?
Speedtest.net
Fast.com
Yandex Speed
Another
I haven't checked.
⚠️ Attention: if the speed via Wi-Fi is significantly lower than via cable (for example, 100 Mbps against 500 Mbps), the problem lies in the wireless network settings or hardware limitations of the adapter.

2. Checking speed via the command line (Windows/macOS)

If you don't trust online services or want to test your speed without a browser, you can use the operating system's built-in tools. This method will show the actual connection speed to the router, and not with a remote server.

For Windows:

  1. Open Command line (Win + R → enter cmd → Enter).
  2. Enter the command to check your current connection speed: 
    netsh wlan show interfaces

    Look for the line Upload/Receive Speed ​​(Mbps).

  3. To check the ping to a router or website, use: 
    ping 8.8.8.8 -n 20

    (Where 8.8.8.8 — Google DNS, and -n 20 sends 20 packets for accuracy).

For macOS:

  1. Open Terminal (Command + Space → enter Terminal).
  2. Enter the command to display the Wi-Fi status: 
    networksetup -getinfo Wi-Fi
  3. To check ping, use: 
    ping -c 20 google.com

These commands will show theoretical connection speed to the router, but not the actual internet bandwidth. For example, if the adapter supports Wi-Fi 5 (802.11ac) at a speed of up to 867 Mbps, but the router only gives out 300 Mbps, you will see exactly 300 Mbps.

3. Specialized programs for in-depth diagnostics

Online tests and the command line provide basic data, but for full diagnostics It's better to use professional utilities. They will show:

  • 📶 Wi-Fi signal strength (V dBm — the closer to 0, the better).
  • 🔄 Channel congestion (if the channel is overloaded, the speed drops).
  • 📉 Packet loss And jitter (ping variability is critical for video communication).

Best free programs:

Program Platform Key Features Link
WiFi Analyzer Windows, Android Channel analysis, signal level, optimization recommendations Official website
NetSpot Windows, macOS Wi-Fi coverage map, speed test, interference detection Official website
LAN Speed Test Windows Speed ​​test between devices on a local network Official website
iPerf3 Windows, macOS, Linux Professional network bandwidth test Official website

Example of use WiFi Analyzer:

  1. Download and install the program.
  2. Run a scan and you will see a graph of channel load. 2.4 GHz And 5 GHz.
  3. If your channel (for example, 6) is overloaded, switch to a less loaded one in the router settings.
Why is Wi-Fi speed always lower than cable speed?

Even under ideal conditions, Wi-Fi loses up to 30–50% of its speed due to:

  • 📡 Interference from other networks and devices.
  • 📶 Distances to the router and obstacles (walls, furniture).
  • 🔋 Adapter limitations (For example, Wi-Fi 4 maximum gives 150 Mbps).
  • 🔄 Encryption protocols (WPA3 is slower than WPA2 on older devices).

⚠️ Attention: if the program shows a high level of interference on the channel 2.4 GHz, but your router has 5 GHz, switch to it - it can increase the speed by 2-3 times.

4. How to check the speed through a router

Many modern routers have built-in tools for monitoring speed and traffic. This is convenient if you want to see:

  • 📊 Real channel load all devices on the network.
  • 🔌 Connection speed to the provider (WAN port).
  • 📡 Wi-Fi status (channel, bandwidth, number of connected devices).

Instructions for popular models:

For routers TP-Link:

  1. Go to the control panel at 192.168.0.1 or 192.168.1.1 (login/password usually admin/admin).
  2. Go to the section Advanced → System Tools → Bandwidth Control.
  3. Enable traffic monitoring and view load graphs.

For routers ASUS:

  1. Open 192.168.1.1 and log in.
  2. Go to Administration → System Log → Traffic.
  3. In the tab Wi-Fi Check the current speed of connected devices.

For routers Keenetic:

  1. Go to the web interface at my.keenetic.net.
  2. Open Monitoring → Devices and see the speed of each client.
  3. In the section Internet Check the WAN port speed (it should match your provider's tariff).

If the speed on your router's WAN port is lower than what your ISP claims, the problem is with your ISP—call support.

Use 5 GHz channel (if supported)

Enable channel width 40 or 80 MHz

Disable QoS (if you don't need traffic priority)

Update your router firmware to the latest version

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5. Testing speed via terminal (for advanced users)

If you need the most accurate data without relying on a browser or graphical interface, you can use console utilities. This method is suitable for Windows, macOS And Linux.

Utility iPerf3 (for testing local network):

  1. Download iPerf3 With official website and install on two devices (for example, a PC and a laptop).
  2. On one device, start the server: 
    iperf3 -s
  3. On the second device, run the client for testing: 
    iperf3 -c [server IP address] -t 30

    (Where -t 30 — test duration in seconds).

Utility nuttcp (alternative iPerf):

Likewise iPerf3, but with multithreading support. Commands:

# On the server:

nuttcp -S



On the client:


nuttcp -i1 -T30 [server IP address]

These utilities will show real throughput between devices on a local network, which is useful for diagnosing problems with a Wi-Fi adapter or router.

⚠️ Attention: if during testing through iPerf3 the speed between devices on the same network is lower 100 Mbps, the problem may be in the router settings (for example, it is turned on QoS or lane limitation).

6. Analysis of results: what is considered a normal speed?

Once you've received your speed data, you need to determine whether it matches your plan and equipment capabilities. Here are some approximate values:

Provider tariff Cable speed (Mbps) Wi-Fi speed (Mbps) Acceptable ping (ms)
Up to 100 Mbps 90–100 50–80 <15
100–300 Mbps 250–300 120–200 <20
300–500 Mbps 400–500 200–350 <25
1 Gbps and above 800–950 400–600 <30

If your results are significantly below normal:

  • 🔌 Problem on the provider's side: Cable speed is below the tariff → call support.
  • 📶 Wi-Fi problem: The speed via cable is normal, but via wireless network it is low → check the settings of your router or adapter.
  • 🖥️ PC problem: The speed is low on only one device → update your Wi-Fi adapter drivers or check for viruses.

7. Common Causes of Slow Wi-Fi Speed ​​and How to Fix Them

If your tests show that your speed is lower than expected, here are the most common causes and how to fix them:

  • 📡 Suboptimal Wi-Fi channel:

    Routers on 2.4 GHz often conflict with each other. Use programs like WiFi Analyzerto find a free channel (for example, 1, 6 or 11), and change it in the router settings.

  • 🔋 Outdated Wi-Fi standard:

    If your adapter or router only supports Wi-Fi 4 (802.11n), maximum speed - 150–300 MbpsFor higher speed 300 Mbps needed Wi-Fi 5 (802.11ac) or Wi-Fi 6 (802.11ax).

  • 📶 Weak signal:

    If the signal level is lower -70 dBmThe router is too far away or there are obstacles. Solutions: Move the router, use a repeater or mesh system.

  • 🔌 Network congestion:

    If you have many devices connected to your router (smartphones, smart devices, TVs), they will share the bandwidth. Limit the number of connections or configure QoS.

  • 🛡️ Viruses or background programs:

    Some programs (torrents, mining bots, cloud syncs) may consume bandwidth. Check the Task Manager (Ctrl+Shift+Esc) for the presence of suspicious processes.

If none of the methods helped, try:

  1. Update the router firmware.
  2. Reset the router to factory settings (button Reset on the back panel).
  3. Call your provider and check if there are any problems on their end.

FAQ: Answers to Frequently Asked Questions

🔍 Why is Wi-Fi speed slower than cable?

Wi-Fi is always slower than Ethernet because:

  • Interference from other networks and devices.
  • Limitations of the Wi-Fi standard (for example, 802.11n maximum gives 300 Mbps).
  • Distances to the router and obstacles (walls, furniture).
  • Encryption losses (WPA2/WPA3).

Under ideal conditions, Wi-Fi loses 20–30% of its speed; in real conditions, it can drop to 50%.

📱 How to check Wi-Fi speed on a smartphone?

On Android or iOS you can use the same online services (Speedtest, Fast.com) or specialized applications:

  • WiFi SweetSpots (coverage analysis).
  • NetMaster (network monitoring).
  • Meteor (test of connection speed and quality).

On Android can also be used ##4636##* in the dialer → Wi-Fi information for detailed statistics.

🖥️ Which program is the most accurate for checking speed?

Accuracy depends on the task:

  • For quick check — Speedtest.net or Fast.com.
  • For deep diagnostics — iPerf3 (testing the local network) or WiFi Analyzer (channel analysis).
  • For traffic monitoring - built-in router tools or NetSpot.

For maximum accuracy, run tests on different services and average the results.

⚡ Can antivirus software affect Wi-Fi speed?

Yes, some antiviruses (for example, Kaspersky, Avast) scan traffic in real time, which can reduce speed by 10-30%. Solutions:

  • Add your browser or testing program to your antivirus exceptions.
  • Disable the network scanning function in your antivirus settings.
  • Try temporarily disabling your antivirus and repeat the test.
🔄 How often should I check my Wi-Fi speed?

Recommended frequency:

  • Once a month - for prevention.
  • After any changes in the network (new device, moving the router, firmware update).
  • If problems arise (brakes, broken connections).
  • After changing your tariff plan with your provider (to make sure that the speed matches the stated one).

📖 Read also

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