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Cox Internet Speed Test

Check the speed of your device's connection to the Internet and explore steps you can take to improve performance. For the speed test to provide the most accurate results, use a computer with a Wired (Ethernet) connection, turn off WiFi, and close all other programs on your computer. Get more tips ›

Compare Your Results

Sign in to your account to easily compare the Speed Test results to your Internet plan.

Register › | Forgot ID › | Forgot Password ›

Unexpected results do not necessarily mean there's a problem with your Cox service. Many factors inside your home can cause the speeds on your device to be slower than the speeds Cox delivers to your home. Learn More ›

Want to Improve Your Results?

Here are a few steps you can take:

Improve Speeds

Explore steps you can take to improve your Internet speed.

Restart the Test

After following the tips below, restart the test.


See if there are any outages and reset your modem.

Get Faster Speeds

Upgrade your Internet plan in just a few clicks.

7 Tips to Improve Your Internet Speed

Many factors inside of your home can affect your speed. Follow these tips to enhance your speed:

1. Reboot Equipment

Reboot your modem (watch how-to video) and devices by powering them off and back on for optimal performance.

3. Turn Off WiFi

Turn off WiFi on your computer and unplug your router (if you have one) from your modem. Disconnect from any VPN's.

5. Check Your Equipment

Make sure your modem is DOCSIS 3.0 or higher (DOCSIS 3.1 for Gigablast)—older modems can't process high speeds.

View Cox Certified Modems ›

Time to upgrade? Explore Panoramic WiFi ›

7. Update Your Software

Make sure you have the latest updates installed for your computer’s Operating System and Internet browser (be sure to remove unused plugins/extensions).

2. Connect via Ethernet Cable

Connect your computer directly to your modem with an Ethernet cable (CAT5e or CAT6).

Step-by-Step Instructions ›

4. Close Other Programs

Close all other programs, applications, and browser tabs on your computer to eliminate network congestion.

6. Check Device Limits

Check the owner’s manual for your device to find out if it's capable of processing high speeds. Even many recently-purchased computers and laptops are not capable of broadband speeds.

See tips for improving WiFi speeds

There are steps you can take to improve your WiFi experience, but keep in mind that Wired (Ethernet) connections are faster and will provide more accurate speed test results.

Disconnect Other Devices

Disconnect other devices and close all other programs, applications, and browser tabs (except the tab with the Speed Test) on your device to eliminate network congestion.

Stand in Different Places

Test your speed in different places around your home. Distance from the router and interfering objects can affect speeds.

Check Your Router

Make sure your router operates on the 802.11ac standard.

View Cox Certified Modems ›

Time to upgrade? Explore Panoramic WiFi ›

Add WiFi Extenders

WiFi Extenders can stretch your network to eliminate dead zones. Extenders are available with Panoramic WiFi from Cox.

Explore Panoramic WiFi ›

Move Your Router

Place your router in a central, elevated, open location away from walls, metal objects, and objects that transmit radio waves like cordless phones, microwaves, & Bluetooth devices.

Connect to 5GHz Network

If you have a dual-band router, connect to the 5 GHz network unless you are far away from the router or your device isn’t compatible.

Password Protect

Protect your network with a strong password to prevent others from using your WiFi. Use a combination of upper and lower case letters, numbers and special characters.

For more help improving your WiFi, check out the Ways to Improve Your In-Home WiFi Network article in Cox Support.

Restart the Speed Test

Once you've followed the above tips, restart the speed test to see if you improve your speed test results.

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What You Can Do with Your Cox Internet Plan

Make sure you have the speed you need to keep up with your online activities.

Online Activity Gigablast
9+ devices
Ultimate 300
7-9 devices
Preferred 150
5-7 devices
Essential 30
3-5 devices
Starter 10
1-2 devices
Light Web Surfing Green Check Mark Green Check Mark Green Check Mark Green Check Mark Green Check Mark
Sending/Receiving Email Green Check Mark Green Check Mark Green Check Mark Green Check Mark
Music Streaming Green Check Mark Green Check Mark Green Check Mark Green Check Mark
Light Video Streaming and Gaming Green Check Mark Green Check Mark Green Check Mark
Managing Large Files Green Check Mark Green Check Mark
Multiple HD Video Streaming and Gaming Green Check Mark Green Check Mark
4K Video Streaming and 4K Gaming Green Check Mark
HD Video Calling Green Check Mark

Gigablast is available in select Cox markets. See Gigablast pricing and check availability. Don't see your plan? View grandfathered Cox Internet plans ›

Want faster Internet? Upgrade your plan in a few clicks!

Wall-to-Wall Fast with Panoramic WiFi

Eliminate dead zones with fast WiFi coverage in every part of your home and get total WiFi control with the My WiFi tool. Available on all Cox Internet plans when you add the Panoramic WiFi modem.

Additional Information

Do I have to sign in to run the test or connect to a Cox network?

No – you are not required to sign in prior to starting the Speed Test; however, by signing in first, you can see your current Cox Internet plan speeds to easily compare them to your speed test results. The test is intended to be run on your in-home Cox network but can be run on another network, such as using your mobile carrier data or public WiFi.

Can I test my Cox Internet speed using my smartphone, tablet or other mobile device?

Absolutely! We have designed the speed test so that it scales to multiple device types (Desktop Computer, Laptop, Tablet and Phone) and most major operating systems. Please note that laptop and desktop computers connected directly to your Cox modem typically provide better results than mobile devices due to the factors listed above.

Does Cox guarantee my Internet speed test results will be the same as my subscription tier?

No. Cox does not guarantee that the results of the speed test will match your plan subscription 100% of the time. This is due to a number of factors beyond Cox’s control which may impact your speed, including (but not limited to) the processing power of your personal computing equipment, applications running on your computer, the nature and quality of your home network connection, third party networks you may be connected to, and the performance of the websites you visit and congestion on the Internet.

How does the Cox Speed Test tool work?

The Cox Internet Speed Test is backed by Ookla and measures the ping (latency), download speed and upload speed between your device and a test server. Note that it does not measure the speed Cox is delivering to your modem since many factors affect the speed in your home as it's processed by your modem, device, and everything in between.

During the test, multiple connections to a nearby test server are made to measure latency and download/upload speeds. All samples are sorted by speed, and the two fastest results and the bottom quarter of the remaining samples are removed. The remaining samples are then averaged.

Why are my Cox Speed Test results different than results from other online Speed Tests?

Test methodologies differ between speed test websites, which can cause your results to be different even if the conditions under which you're performing the test are the same. Here are some factors that can differ:

  1. The location of the server being tested
  2. The number of threads being used
  3. How results are measured from analyzing test samples

So what do all of the terms, like "latency," mean? (Glossary)

Wired Connection – using an ethernet cable connected from your device directly to the modem to connect to the Internet and other devices

WiFi Connection – a wireless network that uses a radio frequency signal to connect your devices to the Internet and to each other

Cellular Connection – a network distributed by mobile carriers (AT&T, Verizon, Sprint, T-Mobile, etc.) over land through cells that together provide radio coverage over larger geographical areas

Download – how fast your connection delivers content from the Internet to your device. It determines how long it takes to download files (like photos, movies, songs) or display webpages with lots of images.

Upload – how fast content is delivered from your device to the Internet. It determines how long it takes to post pictures to social media or upload an email attachement.

Mbps – Megabits per second (Mbps) is is the industry-standard measure of transfer rate or Internet speed.

Latency – The reaction time (measured in milliseconds) of your connection–how quickly your device gets a response after you’ve sent out a request

Test Server – a computer system used as the central repository of data and various programs that are shared by users in a network

IP Address – a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network

Modem – a small device that connects to your Internet Service Provider (ISP) to provide Internet in your home

Router – a small device that connects to your modem via an Ethernet cable and passes the Internet connection on to other devices either via additional Ethernet cables or via a wireless network

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Need More Help? Let's chat!

Chat live with a Cox agent to get the fastest answers to all your top questions.

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