How to Fix Slow Wi-Fi at Home (Step by Step)

If you’re trying to figure out how to fix slow Wi-Fi, start by finding out whether the problem is your internet service, your router, or the wireless link between the router and your device. Most slowdowns come from things you can change yourself in under an hour: where the router sits, which band your devices use, outdated firmware, or too many devices pulling data at once.

TL;DR

Run a speed test on Wi-Fi, then again with a laptop plugged into the router by Ethernet. If wired is fast and wireless is slow, the problem is inside your home.
Restart the modem and router, then install any router firmware update.
Move the router to a central, raised, open spot away from microwaves, baby monitors, and Bluetooth speakers.
Put phones, laptops, and TVs on 5 GHz (or 6 GHz if both router and device support it) and leave 2.4 GHz for smart-home gadgets.
If wired speeds are also slow, test directly at the modem and call your internet provider.

Why Your Wi-Fi Is Slow
Symptoms and Likely Causes
How to Fix Slow Wi-Fi, Step by Step
What Not to Do
When to Call a Professional
How to Prevent It
FAQ
Sources

Why Your Wi-Fi Is Slow

Slow Wi-Fi means either the internet coming into your house is slow, or the wireless signal inside it is weak or crowded.

Distance, Walls, and Router Placement

Wi-Fi gets weaker and slower the farther you are from the router. Comcast’s Xfinity advice is to place the gateway somewhere central and open, such as a living room, and lift it a few feet off the floor. A router in a cabinet or basement corner loses much of its signal.

Interference From Other Electronics

Microwaves, baby monitors, and Bluetooth speakers can all disrupt Wi-Fi, according to Xfinity. Apple notes that nearby networks and Bluetooth devices hit the 2.4 GHz band hardest.

The Wrong Band: 2.4 GHz vs 5 GHz vs 6 GHz

Most routers broadcast on more than one frequency band, and each one trades range for speed. Intel describes 2.4 GHz as having the longest range and best wall penetration but only about 100 Mbps of typical real-world throughput. 5 GHz can reach up to about 1 Gbps with shorter range, and 6 GHz can reach up to about 2 Gbps.

The catch with 6 GHz is compatibility. Both the router and the device need Wi-Fi 6E (or newer) hardware, and Intel points out that a device labeled plain “Wi-Fi 6” doesn’t necessarily support 6 GHz.

Channel Congestion

Each band is split into channels, and every network near you competes for them. Intel says 2.4 GHz typically has just three usable 20 MHz channels and is heavily congested because older devices crowd onto it.

Outdated Firmware

Router makers push firmware updates that fix bugs, close security holes, and improve performance. NETGEAR lists a firmware update as the first thing to try for slow connections.

A Modem or Router That Needs a Restart

Routers run for months without a break, and glitches build up. A power cycle of both the modem and router clears many of these problems, and NETGEAR recommends it early in troubleshooting.

Too Many Devices and Bandwidth Hogs

Your internet speed is shared by every connected device. The FCC’s household broadband guide groups use into light (email, browsing), moderate (one high-demand activity such as HD streaming or a video call), and high (more than one high-demand activity at once). It suggests homes with four devices in moderate or high use need its “advanced” tier, which it defines as more than 25 Mbps, and the FCC calls these rough guidelines.

An Old Router or Old Wi-Fi Standard

Wi-Fi has gone through several generations: Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax), Wi-Fi 6E, and Wi-Fi 7. An older router may not be able to deliver the speed you pay for, even with a perfect signal. AARP suggests looking up your router’s model number to confirm it supports your plan’s speed. The NSA also advises replacing routers once they reach end of life, because they stop getting security updates.

Coverage Gaps in Larger Homes

One router often can’t cover a large or multistory home, especially one with brick, plaster, or concrete walls.

Your Internet Plan or an ISP Problem

Sometimes the Wi-Fi is fine and the service coming in is the bottleneck. Your plan may be too slow for how your household uses it, there may be an outage, or there may be a problem with the line into your home. NETGEAR’s test for this is simple: if a computer plugged straight into the modem is still slow, contact your provider.

Symptoms and Likely Causes

Symptom	Likely cause	DIY or pro?
Fast near the router, slow in far rooms	Distance, walls, poor placement	DIY: move router, add mesh or extender
Drops when the microwave runs	Interference on 2.4 GHz	DIY: switch device to 5 GHz, move router
Slow in the evening, fine in the morning	Channel congestion or household demand	DIY: change channel, schedule big downloads
Only one device is slow	Old Wi-Fi adapter or device issue	DIY: update or replace device adapter
Everything slow, even over Ethernet	ISP plan, outage, or line problem	Pro: call your internet provider
Slow for weeks, router never updated	Outdated firmware or aging router	DIY: update firmware or replace router
Modem lights blinking or red, frequent full drops	Modem fault or service problem	Pro: ISP technician

How to Fix Slow Wi-Fi, Step by Step

Tools and parts you may need: a laptop with an Ethernet port (or a USB-to-Ethernet adapter), an Ethernet cable, your router’s admin login (often on a sticker on the router), and the router maker’s app or web page.

Safety note: Only unplug equipment at its power adapter, and keep cords where they won’t be tripped over or pinched. Never open a modem, router, or power supply. If a router keeps losing power because an outlet goes dead, check whether you have a circuit breaker that keeps tripping before blaming the equipment.

Step 1: Test Speed on Wi-Fi and on Ethernet

Run a speed test on your phone or laptop over Wi-Fi, standing near the router. Then plug a laptop into the router with an Ethernet cable and test again. Note the speeds in Mbps.

NETGEAR explains how to read the results: if wired is much faster, the problem is Wi-Fi interference or an older Wi-Fi standard. If several devices are slow, it’s network-wide; if just one is, look at that device. If only your laptop crawls and it also runs hot, it may be throttling itself, so check our guide on why a laptop overheats.

Step 2: Restart the Modem and Router

Unplug the power cord from both the modem and the router (or the single gateway if they’re combined).
Wait about a minute.
Plug in the modem first and wait until its status lights settle.
Plug in the router and give it a few minutes to finish starting up.
Run your speed tests again.

Step 3: Update the Router Firmware

Open your router’s app or admin page and look for a firmware or software update section. Apple recommends turning on automatic updates if your router offers them and backing up the router’s settings before changing anything.

Step 4: Move the Router

Put the router in a central, open spot, a few feet off the floor, and out of closed cabinets. Keep it away from the microwave, baby monitors, and wireless speakers. If your modem lives in a utility closet, run a longer Ethernet cable and place the router elsewhere.

Step 5: Use the Right Band for Each Device

Connect laptops, phones, game consoles, and streaming TVs to 5 GHz, or to 6 GHz if both the router and the device support it. Intel suggests leaving 2.4 GHz for low-bandwidth smart-home gear like thermostats, doorbells, and cameras. Apple recommends turning on every band your router supports and using one network name across all bands so devices can pick the best one.

Step 6: Fix Channel Settings

In the router’s wireless settings, set channel selection to Auto, as Apple recommends. Apple also suggests setting the 2.4 GHz channel width to 20 MHz to reduce interference and leaving 5 GHz and 6 GHz on Auto. If your router can’t choose channels automatically, try another channel and retest, as NETGEAR advises.

Step 7: Find the Bandwidth Hogs

Check the connected-devices list in your router’s app. Remove unknown devices and change your Wi-Fi password if needed. Pause or reschedule big downloads, cloud backups, and console updates for overnight.

AARP also suggests taking phones off Wi-Fi when the cellular signal is strong, as long as your data plan allows it.

Step 8: Wire What You Can

An Ethernet cable gives the most consistent speed and frees up airtime for everyone else. A USB Ethernet adapter works for laptops without a port.

Step 9: Add a Mesh System or Extender

If certain rooms are still slow after moving the router, you need more coverage. An extender repeats your router’s signal and is the cheaper option for one dead zone. A mesh system replaces your router with several matched units that work as one network, and it suits larger homes better.

TP-Link recommends no more than one or two extenders per network, each connected to the main router rather than chained to another extender. If your extender supports access point mode, connecting it to the router by Ethernet improves performance.

Step 10: Upgrade an Old Router

Look up your router’s model number. If it’s a Wi-Fi 4 or early Wi-Fi 5 model, no longer gets firmware updates, or can’t reach your plan’s speed over Ethernet, replace it. A Wi-Fi 6, 6E, or 7 router will only help devices that support those standards, but older devices still connect fine.

Step 11: Test at the Modem and Check Your Plan

NETGEAR’s final test: unplug the router, connect a computer straight to the modem by Ethernet, and run a speed test. If it’s still well below your plan’s advertised speed, the issue is your provider or the line into your home. Check your provider’s app for outages and compare your plan to your household’s use.

What Not to Do

Don’t factory-reset the router as a first step. You’ll wipe your settings and may need your provider’s help to get back online.
Don’t unplug the router during a firmware update.
Don’t chain extenders wirelessly one after another; each hop hurts performance.
Don’t hide your network name or rely on MAC address filtering for security. Apple says neither one actually secures the network.
Don’t use outdated security modes like WEP or TKIP. Use WPA3, or WPA2/WPA3 if older devices need it.
Don’t open the modem, router, or power adapter, and don’t splice coax or phone lines outside your home.
Don’t upgrade your plan before testing over Ethernet; it won’t fix weak Wi-Fi.

When to Call a Professional

For Wi-Fi, the “pro” is usually your internet provider’s support line or technician. Call them when you see these signs:

Speed tests straight from the modem by Ethernet are well below your plan, even after a restart.
The modem’s online or connection light stays off, blinks constantly, or turns red.
Your connection drops completely several times a day.
The coax or fiber line outside is damaged, loose, or chewed.
You want Ethernet run through walls to distant rooms. A low-voltage or network cabling installer can do this safely.

Ask your provider whether a service visit or equipment swap carries a fee before you book it, since policies vary by company and plan.

How to Prevent It

Turn on automatic firmware updates. If your router doesn’t have them, the NSA suggests checking for patches monthly.
Schedule a weekly router reboot. The NSA recommends this as a security habit, and it also clears up sluggish routers.
Keep the router central, elevated, and in the open.
Use a strong WPA3 password so neighbors can’t quietly share your bandwidth.
Re-check your plan when your household changes, such as adding a remote worker, a gamer, or more streaming TVs.
Replace your router when the maker stops releasing updates for it.

FAQ

Why is my Wi-Fi slow but my internet speed is fine?

If an Ethernet speed test is fast but Wi-Fi is slow, the problem is inside your home. The usual culprits are distance from the router, interference, a crowded 2.4 GHz band, or an older Wi-Fi adapter in your device.

Should I use 2.4 GHz or 5 GHz Wi-Fi?

Use 5 GHz for streaming, gaming, video calls, and anything that needs speed, especially in the same room or one room away. Use 2.4 GHz for distant spots and smart-home gadgets that need range more than speed. If your router and device both support 6 GHz, that’s usually the fastest and least crowded option at shorter range.

How often should I restart my router?

The NSA recommends rebooting home routers at least once a week.

Is a mesh system better than a Wi-Fi extender?

For a single dead zone, an extender is cheaper and often good enough. For larger or multistory homes, a mesh system usually gives more even coverage because its units are designed to work together as one network.

How do I know if my router is too old?

Look up the model number and check which Wi-Fi standard it supports and whether the maker still releases firmware for it. If it can’t reach your plan’s speed over Ethernet or no longer gets updates, it’s time to replace it. The NSA advises retiring routers at end of life for security reasons.

How to Fix Slow Wi-Fi at Home