Many users mistakenly believe that the speed of a wireless connection should match the figures specified in the provider's tariff plan, but the reality is always more complex.
In reality Wi-Fi network is subject to many factors that reduce throughput, from the distance to the router and wall materials to the congestion of the airwaves from neighboring devices.
Understanding what the indicator is physically achievable in your circumstances, will help avoid unfounded claims against the provider or the purchase of overly expensive equipment.
Factors Affecting Actual Throughput
The data rate over the air never reaches its theoretical maximum due to protocol overhead and the nature of the signal propagation medium.
The key element is Wi-Fi standard, which supports your router and client device, since older models are physically unable to provide high performance.
Frequency range is also critical, as 2.4 GHz is often overloaded with microwaves and Bluetooth devices, creating significant interference.
Distance and obstacles play no less of a role: concrete walls with reinforcement can absorb up to 80% of the signal, turning fast internet into a crawling stream of data.
- 📡 Antenna type and the gain directly affect the quality of reception in distant rooms.
- 🏢 Wall materials: Drywall transmits signals better than brick or monolithic concrete.
- 📺 Number of connected devices divides the available bandwidth between all users.
⚠️ Note: Router interfaces and available channel settings may vary depending on the model and firmware version, so check the menu items with your device's documentation.
Wi-Fi standards and their theoretical limits
To understand what speed is normal, you need to refer to the IEEE 802.11 standard specifications that define the capabilities of the equipment.
The most common one still remains 802.11n, which in ideal conditions provides up to 150-300 Mbit/s, but in practice is often limited to 50-70 Mbit/s.
More modern standards 802.11ac (Wi-Fi 5) and 802.11ax (Wi-Fi 6) allows you to achieve gigabit performance, but this requires support from both devices.
It is important to take into account that real speed usually amounts to only 40-60% of the stated theoretical value due to service packet headers.
Below is a table showing the difference between theory and practice for different generations of wireless networks.
| Standard | Theoretical maximum | Actual speed (one lane) | Range |
|---|---|---|---|
| 802.11n (Wi-Fi 4) | up to 600 Mbps | 50–150 Mbps | 2.4 / 5 GHz |
| 802.11ac (Wi-Fi 5) | up to 6.9 Gbps | 400–800 Mbps | 5 GHz |
| 802.11ax (Wi-Fi 6) | up to 9.6 Gbps | 800 Mbps – 1.5 Gbps | 2.4 / 5 / 6 GHz |
When choosing a router, you should pay attention to the number of antennas and technology support MIMO, which allows you to transmit multiple data streams simultaneously.
Normal values for different tasks
The concept of "normal" speed is subjective and depends solely on how exactly you use the Internet at a particular moment in time.
For surfing news sites and messaging, a stable 5-10 Mbps connection is quite sufficient; higher speeds won't provide a noticeable increase in comfort.
However, for streaming 4K video or downloading heavy games, the requirements increase sharply, and here rates above 50-100 Mbps are critical.
If several people in the house are watching movies, playing games, and working on video conferences at the same time, the channel must be wide to avoid desynchronization and buffering.
- 💬 Messengers and mail: work comfortably from 1-2 Mbit/s.
- 🎥 Full HD Video (1080p): requires a stable 10-15 Mbps.
- 🎮 Online games: low ping (up to 50 ms) is more important than high download speed.
It is important to understand the difference between download speed (Download) and recoil (Upload), since the outgoing stream is what is important for video calls.
2.4 GHz and 5 GHz Bands: Which Bands Are Faster?
Choosing a frequency range is one of the easiest ways to increase your connection speed without replacing your equipment.
The 2.4 GHz band has a greater range and penetration power, but it is very noisy in apartment buildings.
In turn, 5 GHz provides significantly higher data transfer rates, but has a shorter range and is less able to penetrate walls.
For maximum performance, it is recommended to connect devices located in the same room as the router to the 5 GHz network.
⚠️ Note: Older devices may not support the 5GHz band, so make sure your device is compatible before switching.
Modern routers often use technology Smart Connect, automatically selecting the best frequency for each client.
Why is 2.4GHz so slow?
The 2.4 GHz band is divided into only three non-overlapping channels (1, 6, 11). In an apartment building, dozens of neighboring routers create a dense "carpet" of interference, forcing your router to constantly wait for a clear airwave, which dramatically reduces actual throughput.
How to measure connection speed correctly
To obtain objective data, it is necessary to use proven tools and adhere to a number of conditions during testing.
It's best to test your connection via an Ethernet cable to get a sense of your plan's actual speed, and then compare those numbers to your Wi-Fi results.
Use popular services like Speedtest.net or Fast.com, running tests at different times of day to identify patterns.
When testing, close all background programs, torrents, and other browser tabs so that they do not distort the measurement results.
- 🚀 Testing server: choose your provider's server or the nearest major city.
- 📱 Device: Run tests on a modern gadget that supports current Wi-Fi standards.
- 📏 Distance: be 3-5 meters away from the router without any physical obstacles to ensure the integrity of the experiment.
Pay attention to the parameter Ping (latency), since high speed is useless if the network response is hundreds of milliseconds.
☑️ Speed test
Optimization and elimination of bottlenecks
If the indicators are significantly lower than expected, it is worth making a number of adjustments to improve the situation.
The first step should always be to change the broadcast channel to a less busy one, which can be done through the router menu.
Check if there is a speed limit (QoS) for certain devices that may have been activated accidentally or by other users.
It's also worth updating your router's firmware, as manufacturers frequently release patches that improve the stability of the wireless module.
Placing the router high and in the center of the apartment helps distribute the signal evenly throughout all rooms.
⚠️ Note: Some providers provide their own routers with limited functionality, which may hinder in-depth configuration. In this case, it may be worth considering purchasing your own equipment.
FAQ: Frequently Asked Questions
Why is Wi-Fi speed always lower than cable speed?
The wireless connection is half-duplex, meaning the device cannot simultaneously receive and transmit data at full speed, plus a significant portion of the channel is spent on error protection and service signals.
Does the number of connected phones affect the speed?
Yes, the router divides the airtime between all active clients, so the more devices are simultaneously downloading data, the less each one gets.
Do I need to buy a Wi-Fi 6 router if I have a 100 Mbps plan?
For a 100 Mbps plan, a high-quality 802.11ac (Wi-Fi 5) router is sufficient; purchasing Wi-Fi 6 will only be justified if you plan to increase your plan or have a lot of smart devices.
Can weather affect internet speed?
Heavy rain, thunderstorms, or dense fog can weaken the signal, especially at frequencies of 5 GHz and above, but indoors this effect is usually minimal.