Modern users are accustomed to instant page loading, and even the slightest delay in video buffering is irritating. We often don't understand where the problem lies: in our provider's tariff, the capabilities of our router, or interference in our home. Checking your internet speed — This is the first and most important step in diagnosing any network problems.
Many people simply open the first benchmark website they come across and look at a single number, assuming it's the definitive answer. However, the reality is much more complex and depends on numerous factors that must be taken into account to obtain objective data. In this article, we'll discuss how to properly conduct measurements to eliminate errors and understand the true throughput of your wireless network.
The difference between a wired and wireless connection
Before you rush to call your provider complaining about slow speeds, it's important to understand the fundamental difference between what comes into your apartment and what you receive on your device over the air. Ethernet It almost always provides a stable speed, close to that stated in the tariff, since the signal is protected from external interference.
In the case of Wi-Fi network The situation changes dramatically. Radio signals are subject to attenuation when passing through walls, ceilings, and even mirrors. Furthermore, 2.4 GHz and 5 GHz frequencies are affected by neighboring routers, microwave ovens, and Bluetooth devices. This is why Wi-Fi speeds will always be lower than those over cable, and this is a physical limitation of the technology, not necessarily a hardware defect.
To understand the extent of the speed loss between the router and the client, a comparative analysis is necessary. If you're getting 450 Mbps over a cable, but only 50 Mbps over Wi-Fi in the next room, the problem lies in the coverage area or the wireless module settings.
It is also worth considering that bandwidth The wireless channel is shared between all connected devices. If one user is downloading large files while another is watching 4K video, the speed on the third device (for example, the smartphone on which you're taking measurements) may drop to a minimum.
⚠️ Please note: The maximum theoretical Wi-Fi speed of the 802.11n (2.4 GHz) standard rarely exceeds 150 Mbps in real-world conditions, even if the router supports higher speeds. Don't expect gigabit speeds from older devices.
Preparing for testing: eliminating influencing factors
To ensure reliable measurement results, it's essential to create a sterile environment for the test. Any background activity can distort the data, causing falsely low readings. First, disable all programs that may consume bandwidth on the device being tested, such as torrents, cloud syncing apps, game updates, or system updates.
The second critical point is physical location. Get as close to the router as possible, ideally within 1-2 meters of any obstacles. This will eliminate the influence of walls and distance, ensuring your equipment reaches its full potential. If you're in another room, through two concrete walls, you're not measuring internet speed, but the signal quality at that specific point.
Don't forget to reboot your router before starting the procedure. Running it for long periods of time without powering it down can fill up the device's memory buffer and overheat the processor, which inevitably impacts performance. Simply unplugging it for 10-15 seconds often works wonders.
- 📱 Turn off Bluetooth on your smartphone to avoid interference in the 2.4 GHz range.
- 💻 Close all unnecessary browser tabs, especially those with autoplay videos.
- 🔄 Make sure that downloads are not in progress on other devices on the network (TV, console).
Following these simple rules will allow you to get objective data, which you can then work on. Ignoring preparation will only lead to you struggling with non-existent problems or, conversely, missing a real malfunction.
Online services for quick verification
The most accessible way to measure speed is to use specialized websites. They run directly in the browser and don't require any additional software. The market leader for many years has been Speedtest by OoklaIt automatically selects the closest server to minimize latency and provides detailed statistics.
Another popular option is - Fast.com, developed by Netflix. Its main advantage is its minimalist design and lack of ads. The service immediately begins testing and displays results, focusing primarily on the network's ability to play video content. For regular users, this is often the most convenient option.
It's also worth mentioning a Google service that integrates directly into search results. If you search for "speed test," Google will offer to run a test. M-LabThis is convenient because you don't need to go to third-party sites, but the functionality is basic: you'll only get ping, download, and upload speeds.
When using online services, it's important to pay attention to the selected server. Sometimes the automatic selection is incorrect, and the test is sent to a different city or even country. Always check the server location before running the test to ensure the data is relevant.
Professional programs for PCs and smartphones
For a more in-depth analysis that goes beyond simple numerical measurements, it's best to use specialized software. Browser tests rely on the browser's performance and the number of open tabs, while some programs work directly with the network adapter.
One of the best programs for Windows is NetWorxIt allows you to not only conduct one-time measurements, but also continuously monitor traffic, create graphs, and identify bandwidth-hungry applications. For macOS, it's an excellent choice. Network Utility or more advanced iStat Menus.
There are also powerful tools available on mobile platforms (Android and iOS). The app WiFi Analyzer (or its equivalent) will not only help you check your speed but also see channel congestion, which is critical for configuring your router. You'll be able to visually assess which frequency has the least interference from neighbors.
Using software is especially useful if you want to test connection stability over time. You can run a long test or monitor and walk around your apartment, noting where the speed drops critically. This will help you identify "dead zones" and determine whether you need a connection. Wi-Fi repeater or Mesh system.
⚠️ Note: Some antivirus programs and firewalls may block network utilities, considering their activity suspicious. If errors occur, add the program to the exceptions list.
Results Interpretation: Ping, Download, Upload
After completing the test, you'll see several numbers, and it's important to understand what each one represents. The most noticeable one is Download (download speed). This is the amount of data your device receives from the network per second. This determines how quickly a website opens, a photo loads, or a movie starts playing.
The second important parameter is Upload (upload speed). This shows how quickly you can send data to the network. This is critical for video calls (Zoom, Skype), uploading files to the cloud, streaming, and sending large photos via messenger. Providers often underestimate this metric relative to download speed.
The third, but no less important indicator is Ping (latency). It's measured in milliseconds (ms) and indicates the time it takes for a signal to reach the server and return. While ping isn't as important for watching videos, it's crucial for online gaming. High ping (over 100 ms) will result in lag and player "teleportation."
|Ping stability (variance)|
| Parameter | Unit of measurement | What is it responsible for? | Normal value |
|---|---|---|---|
| Ping | ms (ms) | Network response (games, calls) | 1-20 ms (fiber optic) |
| Download | Mbps | Downloading and viewing content | Depends on the tariff |
| Upload | Mbps | File uploading, streaming | 30-50% of the download |
| Jitter | ms (ms) | Less than 5-10 ms |
What is Jitter?
Jitter is a variation of ping. If ping fluctuates between 10 and 100 ms, games will lag even with a good average. Consistency is more important than absolute numbers.
Pay attention to the units of measurement. Providers indicate speed in megabits (Mbps), while download programs (such as torrents) often display speed in megabytes (MB/s). 1 Byte is equal to 8 bits, so to get the actual file download speed, you need to divide the provider's stated speed by 8.
Why does the actual speed differ from the stated one?
A common situation: I have a 100 Mbps plan, a gigabit router, but tests show 40-50 Mbps. Why does this happen? The first reason is technical limitations of the equipment. If your router or computer's network card is limited to 100 Mbps (the Fast Ethernet standard), then they physically can't work faster, even if the channel is wider.
The second reason is Wi-Fi standards. At 2.4 GHz in an apartment building, due to the huge number of neighboring networks, the actual speed rarely exceeds 20-30 Mbps, even if the router supports 300 Mbps. Switching to a different frequency band 5 GHz (802.11ac or ax standard) solves this problem by providing speeds close to wired ones.
The third reason is the "last mile" and the load on the ISP's node. During peak hours (in the evening), when everyone in the house is watching movies, the ISP's channel can be overloaded. The router itself can also throttle speeds if it has heavy features enabled, such as QoS, parental controls, or VPN tunnels, which the device's processor can't handle at high speeds.
☑️ Low speed diagnostics
Don't forget about the receiving device's specifications either. An older smartphone, released 5-7 years ago, may simply not support modern encryption and modulation standards, limiting the speed based on its hardware.
Frequently Asked Questions (FAQ)
Why is Wi-Fi speed half that of cable?
This is normal for the 2.4 GHz band due to its narrow and noisy nature. Wi-Fi operates in half-duplex mode (reception and transmission occur alternately, rather than simultaneously), which theoretically reduces the channel throughput by half compared to a full-duplex cable. Furthermore, some of the channel is used for overhead data and error correction.
Does the number of connected devices affect the test result?
Yes, it does have a direct impact. The router distributes available airtime among all clients. If one device is actively downloading data, it takes up most of the time, leaving only a small portion for your device being tested. For a clean test, it's best to turn off all other devices.
How often should I check my internet speed?
It's sufficient to do this when signing up for a new plan, purchasing a new router, or experiencing problems with video playback. Constant monitoring isn't required, as speed is variable and depends on the time of day and the provider's network load.
Can weather affect Wi-Fi speed?
Heavy rain, thunderstorms, or snowfall can weaken the radio signal, especially if you're using mobile internet (4G/5G) via a USB modem or router with a SIM card. Weather has minimal impact on home wired Wi-Fi, unless it damages the provider's physical infrastructure outside.