How many computers can you connect to Wi-Fi: real limits and how to expand them

Have you ever wondered why your Wi-Fi starts to slow down when smartphones, laptops, smart speakers, and TVs are all connected to the network at the same time? It's not just about internet speed—every router has its own hard limit on the number of connected devices, and exceeding it leads to lag, connection drops, or complete blocking of new devices. In this article, we'll look at how many computers (and other devices) can be connected to Wi-Fi. theoretically And practically, what these restrictions depend on, and how to get around them without buying new equipment.

Spoiler: Manufacturers often list figures like "up to 256 devices" in router specifications, but in reality, even flagship models start to choke after just 30–50 active connections. It's all about hardware limitations (processor, RAM, Wi-Fi protocol) and network settings (DHCP pool, channel width, security standard). We tested popular router models, from budget ones TP-Link TL-WR840N to professional Ubiquiti UniFi — and revealed the real “ceilings” of their capabilities.

If you need to connect more devices to Wi-Fi than your current router allows, don't rush to the store. In 80% of cases, this fixes the problem. Proper DHCP setup, dividing the network into subnets, or switching to the modern Wi-Fi 6 standardFor offices and large homes, we've prepared a guide on setting up a network with multiple access points—it's cheaper than buying a single "monster" for 50,000 rubles.

Theoretical maximum: how many devices does a Wi-Fi router support?

On the box of any router you will find a label like “up to 64/128/256 connected devices.” This number means maximum number of MAC addresses, which the router's DHCP server can remember. However, it says virtually nothing about actual performance. Here's why:

• 🔢 Budget routers (up to 3,000 ₽): 32–64 devices. Example: Tenda FH1203, D-Link DIR-615In practice, they work stably with 10–15 active connections.
• 💻 Middle segment (3,000–10,000 ₽): 64–128 devices. Example: ASUS RT-AX55, TP-Link Archer C6The real limit is 25–40 devices under active load.
• 🏢 Professional solutions (from 10,000 ₽): 256+ devices. Example: MikroTik hAP ac³, Ubiquiti U6-ProCapable of supporting 50–100 connections without any drops.

The key word here is active connectionsA router can "remember" 256 devices, but if all of them are simultaneously downloading files, watching 4K videos, or playing online games, even a top-end model will start to lag. This is due to the limitations of the processor and RAM: every data packet requires processing, and the router's resources are finite.

It is important to understand that each connected device consumes the router's resources, even if it's just "hanging" online. For example, a smart light bulb Xiaomi Yeelight can send data packets every 5 seconds, and the TV Samsung QLED — every minute. These "background" requests add up and eat into performance.

What does the actual number of connections depend on?

In short, from gland And firmware router. But let's take a closer look.

1. Hardware limitations

• 🖥️ CPU: single-threaded CPUs (for example, in TP-Link TL-WR740N) can't handle processing packets from 20+ devices. Multithreaded (as in ASUS RT-AX86U) hold up to 50–60.
• 🧠 RAM: 64 MB is enough for 10-15 devices, 256 MB for 30-40. Professional models have 512 MB-1 GB.
• 📡 Wi-Fi chipset: Legacy standards (802.11n) are limited to 32 devices per frequency. Modern Wi-Fi 6 (802.11ax) supports up to 100+ thanks to technology OFDMA.

2. Network settings

• 🔄 DHCP pool: If the router settings specify an IP address range of 192.168.1.100–192.168.1.200, then the maximum number of devices that can be connected is 100 (even if the router supports more).
• 🔒 Safety Standard: WPA3 requires more resources for encryption than WPA2On weak routers, this can reduce the connection limit by 20–30%.
• 📶 Channel width: An 80 MHz channel allows for more data throughput, but increases processor load. On budget models, 20 or 40 MHz is better.

3. Traffic type

It's one thing when 30 smartphones are connected to Wi-Fi in standby mode, and quite another when the same 30 devices are connected simultaneously:

• 🎮 are playing Call of Duty: Warzone (consumption ~50 Mbps per device);
• 📺 watch Netflix in 4K (~25 Mbps);
• 💾 Download torrents (~100+ Mbps).

In the latter case, even a professional router can crash after 10–15 connections.

How to check how many devices are connected to your Wi-Fi?

Before considering increasing the limit, make sure the issue is truly related to the number of connections. Here's how to check the current load:

Method 1: Router web interface

1. Open your browser and enter the router's IP address (usually 192.168.0.1 or 192.168.1.1).

2. Log in (default logins: admin/admin or see the sticker on the router).

3. Find the section DHCP Clients, Connected Devices or Local area network (the name depends on the model).

Example for Keenetic:

Main Menu → Devices → Device List

Method 2: Mobile applications

Most manufacturers have official applications for managing the router:

• 📱 TP-Link Tether (for TP-Link routers);
• 📱 ASUS Router (for ASUS devices);
• 📱 Mi Wi-Fi (for Xiaomi routers).

They have a section with connected devices and their MAC addresses.

Method 3: Command Line (Advanced)

If you have access to a computer on this network, you can use the command:

arp -a

It will display all IP and MAC addresses of devices on the local network. However, this method isn't always accurate—it only displays devices with which your PC has recently interacted.

What should I do if an unknown device appears in the list of devices?

If you see an unfamiliar MAC address, it could be a sign that your network has been hacked. Disable the unknown device through the router's web interface and change the Wi-Fi password. To be on the safe side, enable MAC address filtering (although this isn't a panacea—MAC addresses are easily spoofed).

How to increase the number of connected devices without buying a new router?

If your router is already choking from the number of gadgets, try these methods for free:

1. Optimize DHCP settings

By default, many routers assign IP addresses in the range 192.168.1.100–192.168.1.200. If you have 50 devices and the range only includes 100 addresses, the router will waste resources redistributing IP addresses. Expand the pool:

192.168.1.100 – 192.168.1.250

How to change (using example) TP-Link):

Network → DHCP → DHCP Settings → Start/End IP Address

2. Divide the network into subnets (VLANs)

If you have a lot of devices, but they are used in different ways (for example, smart home + laptops + TVs), separate them into separate networks:

• 🖥️ Main network: for PCs, laptops, smartphones;
• 💡 IoT network: for smart lamps, sockets, sensors;
• 🎮 Guest network: for friends and temporary devices.

This will reduce the load on DHCP and improve security. The setting is available in the sections VLAN or Guest network.

3. Update your router firmware

Manufacturers regularly release updates that optimize performance with a wide range of devices. For example, firmware for ASUS RT-AC68U From 2023, it improves stability with 40+ connections compared to the 2019 version.

How to update:

Administration → Firmware Upgrade → Check for Updates

4. Disable unnecessary features

Some router options consume resources that could otherwise be used to handle additional connections:

• ❌ Parental Control (parental control);
• ❌ QoS (traffic prioritization);
• ❌ IPv6 (if not used);
• ❌ Remote control (remote access).

Expand DHCP pool to 200+ addresses|

Update firmware to the latest version|

Disable QoS and Parental Control|

Separate devices into subnets (VLAN)|

Switch to Wi-Fi 5 (802.11ac) or Wi-Fi 6 (802.11ax)-->

When is it time to buy a new router?

If all the above methods haven't helped, and your router still crashes after 20-30 connections, it's time to consider a replacement. Here are some signs that your hardware is outdated:

• ⚠️ Router overheats and switches off under load;
• ⚠️ Internet speed falls by 2–3 timeswhen more than 10 devices are connected;
• ⚠️ Appear in the web interface mistakes or it doesn't open at all;
• ⚠️ Router does not support Wi-Fi 5/6 (802.11n standard is obsolete).

For a home with 30–50 devices, a mid-range router with:

• 🔹 Dual-core processor (eg. Broadcom BCM4906);
• 🔹 256 MB of RAM;
• 🔹 Support Wi-Fi 6 (802.11ax);
• 🔹 Gigabit LAN/WAN ports.

Examples of models:

• 💰 Budget: TP-Link Archer AX21 (~5,000 ₽, up to 40 devices);
• 💼 Middle segment: ASUS RT-AX58U (~12,000 ₽, up to 60 devices);
• 🏢 For the office: Ubiquiti U6-Pro (~20,000 ₽, 100+ devices).

How to organize a network for 100+ devices?

If you have a large home, office, or simply a lot of gadgets (smart home, cameras, servers), one router won't be enough. The solution is distributed network with multiple access points.

Scheme 1: Router + access points (AP)

1. Buy main router (For example, MikroTik hEX S) - it will manage the network and distribute IP addresses.

2. Add access points (For example, Ubiquiti U6-LR) in different parts of the house/office, connecting them to the router via cable (recommended) or Wi-Fi (interferes).

3. Configure all APs to the same network (same SSID and password) so that devices automatically switch between them.

Scheme 2: Mesh system

Mesh networks (for example, TP-Link Deco or Google Nest Wi-Fi) consist of several nodes that automatically distribute the load. Advantages:

• ✅ Automatic switching between nodes;
• ✅ Single network (no need to reconnect);
• ✅ Easy setup via mobile app.

Cons:

• ❌ More expensive than a router + separate APs;
• ❌ Less flexibility in settings.

Scheme 3: Professional network (for offices)

For 100+ devices you will need:

• 🖥️ Router (For example, MikroTik RB4011);
• 📡 Managed switches (For example, Netgear GS308T);
• 📶 Access points (For example, Ubiquiti U6-Pro);
• 🔧 Controller (For example, Ubiquiti Cloud Key) for centralized management.

Such a network will allow you to connect 200+ devices without speed drops.

What is VLAN and why is it needed?

VLAN (Virtual LAN) is a technology that allows you to divide a single physical network into multiple logical ones. For example, you can create separate networks for:

- Main devices (PCs, laptops);

- Smart home (lamps, sockets);

- Guests.

This improves security and reduces the load on the router, since traffic between VLANs is isolated.

Common network setup errors for many devices

Even experienced users sometimes make mistakes that lead to connection issues. Here are the most common ones:

⚠️ Attention: If you use Wi-Fi repeater, remember that he reduces network throughput by 2 times and increases latency. For large numbers of devices, it's better to use access points connected via cable.

• 🔌 Using cheap cables: Category cables Cat.5 limit the speed to 100 Mbps. For modern networks, it is necessary Cat.5e or Cat.6.
• 🔒 The Wi-Fi password is too complex: Passwords longer than 20 characters with special characters may cause compatibility issues with some devices (such as older printers).
• 📶 Overloading of one channelIf all devices are connected to the 2.4 GHz frequency, they will interfere with each other. Separate them: smartphones and laptops on 5 GHz, and smart home devices on 2.4 GHz.
• 🔄 Lack of backup channel: If the router supports dual stripe (2.4 + 5 GHz), configure both networks with the same SSID. Devices will automatically switch to the less crowded frequency.

⚠️ Attention: Some smart devices (such as cameras) Hikvision or Dahua) can block other gadgets on the network, if there are too many of them. This is due to specific features of their firmware. The solution is to assign them a separate VLAN.

FAQ: Answers to Frequently Asked Questions

Is it possible to connect more devices to Wi-Fi than specified in the router specifications?

Technically yes, but it will lead to strong lags or connection breaksFor example, a router with a 64-device limit can assign IP addresses to 100 devices, but won't be able to process their traffic. We recommend adhering to the actual limits (see the table above).

Why isn't my router assigning IP addresses to new devices, even though I only have 10 connected?

Possible reasons:

• 🔹 The DHCP pool is running low on IP addresses (please expand the range);
• 🔹 There are devices on the network with static IP, which conflict with DHCP;
• 🔹 Router hung (reboot it).

Check your DHCP settings and the list of connected devices in the web interface.

How do I know how many devices my router can handle?

The exact figure can only be found out experimentally:

1. Connect devices one by one and test the speed (for example, via Speedtest).
2. Monitor the router's CPU load (some firmware versions have a graph in the section System Status).
3. As soon as the speed drops by 30% or breaks appear, this is your limit.

For a rough estimate, use the table in the Theoretical Maximum section.

Is it possible to use an old router as an access point to increase the number of connections?

Yes, this is one of the cheapest ways to expand your network. Instructions:

1. Connect the old router to the main one via cable (from LAN to LAN).
2. Disable DHCP on the second router (so that only the main one distributes IP).
3. Set up the same Wi-Fi network (SSID and password) as on your main router.

Cons: Devices will not automatically switch between routers (unlike Mesh systems).

Does the Wi-Fi standard (802.11n/ac/ax) affect the number of connected devices?

Yes, and very much so:

• 📶 802.11n (Wi-Fi 4): up to 32 devices per access point;
• 📶 802.11ac (Wi-Fi 5): up to 64–100 devices;
• 📶 802.11ax (Wi-Fi 6): up to 100+ thanks to technology OFDMA (simultaneous data transfer to multiple devices).

If your router is older than 5 years, it most likely only supports 802.11n - this is the main reason for the restrictions.