Modern users often encounter a situation where the internet speed advertised by their provider doesn't match the actual speed on their devices. In most cases, the problem lies not with the provider's line, but with limitations of the wireless network. Understanding that How to find out the speed of a router, is a key skill for diagnosing connection problems.
Before blaming your provider or buying new equipment, it's important to conduct a thorough diagnosis. Data transfer speeds over the air will always be lower than over a cable due to the transmission medium, interference, and encryption standards. The difference between the theoretical maximum and actual data can reach 50% or more.
In this article, we'll cover all available testing methods: from simple online tests to professional analysis using the console and specialized software. You'll learn to differentiate channel bandwidth from physical connection speed and understand where exactly your megabits are being lost.
Factors Affecting Actual Wi-Fi Speed
Wireless network speed is affected by many variables. The first and most obvious factor is the standard. Wi-Fi, which is supported by your router and receiving device. If the router supports Wi-Fi 5 (802.11ac), and the smartphone only works in the range 802.11n, then the speed will be limited by the capabilities of the phone, even if the provider provides gigabit.
The second important aspect is the frequency range. The range 2.4 GHz It has better penetration, but it's heavily congested with neighboring networks and household appliances like microwaves. This creates interference and reduces effective throughput. The 5 GHz band offers higher speeds but has poorer penetration through walls.
- 📡 Channel width: The spectrum width (20, 40, 80 or 160 MHz) directly affects the volume of data transmitted per unit of time.
- 📶 Signal level: The further the device is from the router or the more obstacles there are, the lower the signal modulation rate.
- 🛡️ Encryption type: Outdated security methods, for example WEP or WPA/TKIP, can artificially limit the speed to 54 Mbps.
It's also worth considering the number of simultaneously connected clients. The router distributes time slots among devices, and under heavy load, the router's processor may not be able to handle the packet flow. Maximum speed is only achieved with a direct connection between one client and the router under ideal, interference-free conditions.
⚠️ Please note: Antenna specifications listed on the box (e.g., "5 dBi gain") describe the signal's directionality, not its strength or speed. High gain does not always mean better reception in an apartment.
Checking connection speed and using online services
The easiest way How to find out the speed of a router — this is the use of specialized online services. However, it's important to understand the difference between internet speed and local network speed. Tests like Speedtest.net show your external internet speed, which is limited by your provider's plan.
To check the connection speed between your device and the router (link speed), you need to look at your operating system's system indicators. In Windows, you can do this by clicking the Wi-Fi icon and selecting "Properties." The "Speed (Receive/Transmit)" field displays the current negotiated rate.
If you see a value of 65, 130 or 300 Mbps, then the connection is using the old standard. 802.11n in the 2.4 GHz band. For modern networks, the norm is values of 433 Mbps and above, which indicates operation in the 5 GHz band. Low link speeds automatically limit the maximum possible traffic.
☑️ Diagnostics of the current connection
Online tests are useful for identifying bottlenecks on the ISP side. If the link speed is high (for example, 866 Mbps), and Speedtest shows 20 Mbps, the problem is definitely not with the router or Wi-Fi, but with the external line or the ISP's server.
Using the command line for detailed diagnostics
For a more in-depth analysis, you can use built-in command-line utilities in the Windows operating system. This allows you to obtain technical information without installing third-party software. Open the command prompt (cmd) or PowerShell as administrator.
Enter the command netsh wlan show interfacesIn the list that appears, find the "Speed" line. It will show the current connection speed in bits per second. Divide this number by 1,000,000 to get the value in Mbps. Also, look at the "Radio type" line—it will indicate the active standard (e.g., 802.11ac).
netsh wlan show interfacesAnother useful tool is the utility netstat, which shows network connection activity in real time, although it's more suitable for analyzing the traffic of specific applications rather than the physical link speed. To check signal quality and noise levels in Linux and macOS, use the following commands: iwconfig or wifi-status.
- 🖥️ netsh wlan: The main tool in Windows for managing wireless interfaces.
- 📉 Noise level: In the command output you can find the noise level (Noise), which affects the signal-to-noise ratio (SNR).
- 🔄 Channel: The commands allow you to find out which channel the network is operating on, which is useful for analyzing airtime congestion.
Using the command line provides a static picture at the time of the request. To track speed changes dynamically as you move around the room, it's better to use graphical resource monitors.
Speed analysis using specialized software
Third-party programs provide more visual information and change history. One of the best tools for Windows is inSSIDer or Acrylic Wi-Fi HomeThey scan the airwaves, displaying all available networks, their channels, signal strength, and maximum supported speed (Max Rate).
To check the actual file transfer speed within a local network (which excludes the influence of the provider), use utilities like LAN Speed Test Or use built-in tools for copying large files. Create a shared folder on your computer and copy a large file there from your laptop or phone via Wi-Fi. The copy speed in MB/s multiplied by 8 will give you the speed in Mbps.
Mobile applications such as Wi-Fi Analyzer (Android) or AirPort Utility (iOS) allow you to evaluate signal quality and speed in different parts of your apartment. This helps identify "dead zones" where the router switches to lower speed standards.
Why does the speed in the program show 10 MB/s and not 100 Mbps?
Computer programs often display speed in bytes per second (MB/s) rather than bits (Mb/s). 1 byte = 8 bits. So, if your speed is 100 Mb/s, the program will show approximately 12.5 MB/s. This is normal and not an error.
⚠️ Note: Router and operating system interfaces may change with updates. The location of menu items or parameter names in newer versions of Windows or macOS may differ from those described in the manuals.
Comparison of Wi-Fi standards and their impact on throughput
To understand the theoretical speed you can achieve, you need to know the standards of your equipment. Below is a table showing the maximum speed depending on the standard and the number of antennas (streams).
| Standard | Range | Max. speed (1 antenna) | Max. speed (4 antennas) |
|---|---|---|---|
| 802.11n (Wi-Fi 4) | 2.4 / 5 GHz | 150 Mbps | 600 Mbps |
| 802.11ac (Wi-Fi 5) | 5 GHz | 433 Mbps | 1733 Mbps |
| 802.11ax (Wi-Fi 6) | 2.4 / 5 GHz | 600 Mbps | 2400 Mbps |
| 802.11be (Wi-Fi 7) | 2.4 / 5 / 6 GHz | up to 3000+ Mbps | up to 10,000+ Mbps |
It is important to note that the real throughput Payload (the payload) is always around 50-70% of the theoretical maximum due to protocol overhead, service packets, and latency. For example, a router rated AC1200 (300+867 Mbps total) will realistically deliver around 400-500 Mbps to a single client over 5 GHz Wi-Fi.
New standard Wi-Fi 6E And Wi-Fi 7 They're adding a 6 GHz band, which is completely free of interference, enabling near-gigabit speeds over the air. However, this requires the appropriate client devices.
Optimizing your router settings for maximum speed
If diagnostics show that the speed is lower than possible, you need to configure the router. Go to the web interface (usually at 192.168.0.1 or 192.168.1.1). First, check if the mode is enabled. 802.11ac/ax and whether the operating mode "Mixed" or only the new standard is selected.
A critical parameter is channel width. For the 2.4 GHz band, leave it at 20 MHz to avoid interference. For 5 GHz, set it to 80 MHz or 160 MHz (if the router and client allow it). Automatic channel selection often doesn't work correctly; it's best to manually select a clear channel using data from a network scanner.
Also check the security mode. Make sure it is selected. WPA2-PSK (AES) or WPA3TKIP or WEP modes force network speeds down to 54 Mbps on many devices. Disabling legacy features like WPS may also improve stability slightly.
- 🚀 QoS: The traffic prioritization feature will help you allocate bandwidth for games or video calls.
- 📡 Transmitter power: In some cases, reducing the power helps avoid signal echo and improves stability.
- 🔄 Firmware update: Manufacturers often release patches that improve the operation of the radio module.
Frequently Asked Questions (FAQ)
Why does the router show 300 Mbps, but the Internet works at 50 Mbps?
300 Mbps is the connection speed between your device and the router (local network). 50 Mbps is the speed of your ISP plan (global network access). The router can't create a higher speed than your ISP provides.
How to check Wi-Fi speed on your phone?
On Android, you can use the Wi-Fi Analyzer app to view your link speed or Speedtest to check your internet speed. On iPhone, the Wi-Fi standard (e.g., 802.11ax) may be displayed next to the network name in the Wi-Fi settings, but it's better to check your exact speed using third-party utilities or tests.
Does the number of antennas affect speed?
Yes, the number of antennas determines the number of spatial streams (MIMO). More antennas mean higher overall speed and a more stable signal in the presence of interference, but only if the client device also supports multiple-input multiple-output (MIMO).
Can an old router limit the speed of a new plan?
Absolutely. If your router only supports the 802.11n standard (ideally up to 150-300 Mbps, realistically less), it will become a bottleneck for your 500 Mbps or 1 Gbps plan. In this case, you'll need to replace the hardware.