Our free to use speed test gives an accurate calculation of the speed of your internet connection at the time the test was taken. The test uses the most modern methodology rigorously tested over a number of years of development and has been shown to be accurate from low speed (sub 1 Mbps) through to high speed (over 7 Gigabites Per Second) connections.
Any speed test is a 'snapshot' of the speed of the internet connection at the particular time the broadband speed test is run. There are a number of interconnecting elements that will affect the result of the speed test, including the processor load on the computer, the load on your home network, the load on the local exchange, the load on your ISP and the load on the speed test Servers.
To get the most accurate result it is recommended that the test is taken on a device connected by wired ethernet cable to the router. However, this is not always realistic as most people and devices connect to the router (hub) via WiFi. So if the test is being run over WiFi it is recommended that the device is in the same room as the router and the device WiFi strength indicator shows the maximum connection to the router.
Upload speed is the time it takes for your connection to send data back to the speed test server. Common online tasks like sending emails, video-chatting, and posting photos to social media platforms require responsive upload speeds.
The MoneySuperMarket broadband speed test is a free service that lets you test your internet connection in seconds. The results are sent to your inbox so you can see if you’re getting the broadband speed.
ZDNet's Broadband Speed Test measures the data throughput between a computer and a geographic distributed network of servers to calculate how fast broadband speeds are in the real world. The Geek Squad broadband speed test gives you an approximate reading of your internet connection's speed. Choose the city closest to your location for the most accurate measurement of your connection's maximum speed. Before you run the test, we recommend that you close any programs you have open, especially those that connect to the internet.
It is also recommended that in order for the test result not be affected by other the devices the network that it ensured that no other devices are performing high bandwidth actions such as playing games, watching BBC iPlayer or downloading data files (such as photos, movies, applications, etc). Also look out for software updates (such as Windows Update) running as these can consume a large amount of bandwidth.
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Differing times of the day can produce different speed test results as there may be more users of the internet via the local exchange depending on the time of day. eg late afternoon as children come home from school and start using their home internet connection.
Additionally, some older computers and mobile devices may not be able to achieve the maximum possible speed of the internet connection. This can be down to older CPU's or limited network interfaces - some older generation network interfaces will be limited to 100 Mbps. Rar english 64 bit.
Why do I get a “socket error” message? An error may result from having the speed test open in more than one browser tab or window. The test may fail to complete and display the following message: “A socket error occurred during the Upload test. Please try again later.”
To prevent this error, and get the most accurate test results, close all other browser tabs and windows before running.
If you continue to get a socket error message, or another type of error message, please provide feedback by emailing us at [email protected]. Please, include your OS/Browser information.
Why is the location I usually pick missing from the City list? We first complete a latency test to our servers, and if a server does not respond within a specified time frame, it is not included in the City list.
A slow response can be caused by latency or packet-loss between the client and server, or particularly high Internet usage (during peak hours). Do try the test again in a little while.
In which browsers does the Speed Test work best? For best results, use the most recent version of your favorite browser. But at minimum use Firefox 53, Chrome 59, Safari 10, IE 11, or Edge 13 or higher. If you are unable to see Speed Test, though other content appears on the speed test page, check your browser's security setting. Try lowering the setting from High to Medium-High, or even a bit lower, to allow the broadband test application to load.
Why am I receiving “Could not connect to the Internet” errors when I am connected? In some cases, firewall and security software can prevent the test from running and generate a 'could not connect' error. Temporarily lowering the severity should allow the broadband test to run. Be sure to turn it back on before leaving our website.
Why didn’t the test choose the server location nearest me? Our Speed Test automatically detects the optimal server host location for testing, which is not necessarily the closest server host. This is due to real-time network circumstances like number of hops, or current traffic load on each test server. Change the selection using the Change City drop down function directly underneath the Start Test button.
Why is my speed lower than expected? Several factors may slow your connection, resulting in lower-than-expected speeds. Try these simple suggestions below. But if your slower speeds persist, contact your broadband service provider to see if they can determine the issue.
Be sure to stop any downloads or programs that may be using your connection while running the test.
When using a wireless connection, there may be wireless interference. Try using a wired Ethernet connection instead.
Try rebooting your modem or router and then running the test again.
What is “Throughput” and what factors affect my results? There are many factors that impact your speed test results. Throughput problems in your local area network, IP or access overhead, and network design all play a role. Please read the definitions and examples below to learn more about these factors.
Download Download is a measure of how fast your connection delivers content to your computer or local area network.
Upload Upload is the measure of how fast content is delivered from your computer or local area network to others on the Internet. For businesses or power-users, download and upload speed should match or at least be very close. This is important for applications like VoIP, on-line gaming and other interactive programs. Upload speed is even more important if you are operating a server at your location. If achieving optimal upload speed is a concern, consider Ethernet or T1 services.
Kbps Kbps transfer rate = kilobit per second transfer rate. There are 8 bits in a byte, so we would divide kbps by 8 to get KB/sec transfer rate.
Mbps Mbps transfer rate = megabits per second transfer rate. 1000 kilobits equals one megabit. One megabit per second equals 1 million bits per second. Mbps is the industry-standard used by ISPs.
MBps MegaBytes per second. There are 8 megabits in one megabyte.
Transfer Rate
Transfer rate is speed at which data can be transmitted between devices. As files to download become increasingly larger, the highest data transfer rate is most desirable.
Throughput Throughput is the maximum amount of communication or messaging that can be transmitted through a communication channel during an elementary unit of time, usually, in a second. Depending on the type of channel, the addressing mechanism used in that channel, the type of messages are being transmitted and how secure the transmission needs to be—along with physical attributes like temperature, humidity and signal-to-noise ratios—actual measured throughput will vary.
An Example of Throughput You have Ethernet 8.0 Mbps service and need to transmit an email which is exactly 1MB in size You may expect it will take exactly 1 second to transmit that message. But it will actually take longer as the total information that needs to be transmitted is more than 1MB. The total information is called Payload. The channel needs to not only transmit the payload but also some addressing details like where it is coming from and where it is destined to.
The device that sends this email will break down the message into smaller pieces and package them into what are called IP Packets. The size of these packets is usually determined by your Local Area Network. Some have smaller size, so the message will take more IP Packets to transmit; while others may have larger size which needs fewer IP Packets. Each IP Packet also contains an IP Header. This is where the information like the source IP Address, the destination IP Address and additional information about the payload is included. IP Header is usually 20 Bytes (160 Bits) long.
Assuming that this customer uses 100 Byte payload, each IP Packet will now be 120 Bytes long. And that 1MB message will have to be broken down into 10,000 payload pieces. That means to transmit the whole message the channel really needs to transmit about 1,200,000 Bytes or 1.2 MB or 9,600,000 bits. It will take at least 1.2 seconds to transmit all these bytes on this 8 Mbps service assuming that all these IP packets with the payload arrive without any errors and not needing re-transmission. This is called IP Overhead.
Actual Throughput will always be less than line rate of the access service that is communicated by your provider—and this is all based on IP Overhead only. Ethernet services also have a Layer 2 or Ethernet Overhead. Other services may have ATM, Frame Relay or other kinds of Overhead depending on the design. All of this may contribute to a slower bandwidth throughput than what you are expecting.
Other frequent factors influencing throughput:
The number of devices sharing the access circuit and the activity the other devices are generating while the test is running
A rogue LAN port that is clogging the LAN with transmission
A leaky LAN port which degrades LAN performance
LAN signaling issues which create a lot of packet re-transmission for the devices on the LAN
LAN Router with performance issues, low processing power or Deep Packet Inspection and advanced security features like URL blocking enabled
Wireless Access Points on the LAN side
Distance (both geographical as well as number of hops) between the speed testing client and the server
Global Broadband Internet Speed Test
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How does security software and firewalls impact the test? Our internet broadband test sends packets of empty data back and forth to your computer in order to test your line speed. Since we are a third-party sending a receiving a tiny data packet from your computer to perform the test, some ad block or security services interpret this as an attack and act accordingly. Temporarily lowering the severity should allow the speed test to work. Be sure to turn it back on before leaving our website.
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How do I save my bandwidth test results? Your most recent speed test results are saved in your Results History when tested on desktop or tablet.