[{"data":1,"prerenderedAt":278},["ShallowReactive",2],{"page-content:en:jitter-test":3},{"home":4,"toolExplainer":92,"guide":276,"guideTitles":277,"legal":276},{"map":5,"banner":87,"eyebrow":91},{"A more reliable result":6,"How to Test Your Internet Speed":7,"A speed test is a snapshot of this device's connection to the selected test node. A few simple checks make that snapshot more useful.":8,"Pause heavy traffic":9,"Stop large downloads, cloud backups, and 4K streams on this device and, when possible, on other devices sharing the connection.":10,"Use the connection you want to check":11,"Stay on Wi-Fi to assess your current Wi-Fi experience. Use Ethernet to reduce wireless interference when checking the internet service itself.":12,"Run the test more than once":13,"Test at different times, including the busy evening period. One run can be affected by short-lived congestion or background activity.":14,"Compare like with like":15,"Use the same device, location, connection type, and node when comparing results. Record download, upload, ping, and jitter together.":16,"Read all four metrics":17,"Understanding Your Speed Test Results":18,"Download speed":19,"How quickly data reaches your device. It affects streaming, web browsing, app downloads, and receiving large files.":20,"Upload speed":21,"How quickly your device sends data. It matters for video calls, cloud backups, livestreaming, and sharing files.":22,"Ping":23,"The HTTP round-trip time between this browser and the test node. Lower latency generally makes interactive tasks feel more responsive.":24,"Jitter":25,"Variation between consecutive latency samples. Lower and steadier jitter is helpful for voice, video calls, and online play.":26,"Use matters more than one magic number":27,"What Is a Good Internet Speed?":28,"A good speed is one that supports every active device with some headroom. Service requirements vary by provider, video quality, household size, Wi-Fi conditions, and upload demand.":29,"Activity":30,"Practical starting point":31,"What else matters":32,"Browsing and email":33,"About 5–10 Mbps per active user":34,"Latency and page complexity":35,"HD video":36,"3–5 Mbps per stream":37,"Stable sustained download":38,"4K video":39,"15 Mbps or more per stream":40,"Provider and video quality":41,"HD video meetings":42,"About 2–4 Mbps up and down":43,"Upload, ping, jitter, and packet loss":44,"Online gaming":45,"Usually modest throughput":46,"Low latency, low jitter, and stability":47,"Multi-device home":48,"Add concurrent demand plus headroom":49,"Router capacity and Wi-Fi coverage":50,"Reference points include Netflix's current":51,"streaming recommendations":52,"and Zoom's":53,"meeting bandwidth requirements":54,". They are service-specific recommendations, not universal guarantees.":55,"Troubleshoot the path":56,"Why Is My Internet So Slow?":57,"Slow results can come from the internet service, local Wi-Fi, the router, the test device, congestion, or the remote service. Isolate one layer at a time.":58,"Compare Wi-Fi with Ethernet.":59,"A large difference points toward wireless coverage, interference, or router limits.":60,"Move closer to the router.":61,"Walls, distance, and crowded channels can reduce Wi-Fi throughput.":62,"Pause other traffic.":63,"Backups, updates, streaming, and other users share the same capacity.":64,"Restart and update equipment.":65,"Reboot the modem\u002Frouter and check whether its firmware and hardware support the subscribed tier.":66,"Test at several times.":67,"Repeatable evening slowdowns may indicate local or provider-side congestion.":68,"Go deeper":69,"Related Guides":70,"View all guides →":71,"Read the guide →":72,"Common questions":73,"Frequently Asked Questions":74,"Why is my speed test result lower than my internet plan?":75,"Plans are often advertised as “up to” a rate. Wi-Fi conditions, shared traffic, device limits, protocol overhead, congestion, and the route to the test node can all reduce a browser result.":76,"Does this test measure my Wi-Fi signal strength?":77,"No. It measures internet throughput and HTTP latency over whichever connection the device is using. Browsers do not expose router radio strength or channel quality to this page.":78,"Is the ping result an ICMP ping?":79,"No. SpeedTestLab measures HTTP round-trip time to its test endpoint after a warmup request. System ICMP tools can produce different results.":80,"How often should I run a speed test?":81,"Run several tests when investigating a problem: at different times, on Wi-Fi and Ethernet if available, and before and after changing equipment or settings.":82,"Why is my internet so slow?":83,"What is a good internet speed?":84,"Download speed vs. upload speed":85,"How to lower ping":86},"A more reliable result","How to Test Your Internet Speed","A speed test is a snapshot of this device's connection to the selected test node. A few simple checks make that snapshot more useful.","Pause heavy traffic","Stop large downloads, cloud backups, and 4K streams on this device and, when possible, on other devices sharing the connection.","Use the connection you want to check","Stay on Wi-Fi to assess your current Wi-Fi experience. Use Ethernet to reduce wireless interference when checking the internet service itself.","Run the test more than once","Test at different times, including the busy evening period. One run can be affected by short-lived congestion or background activity.","Compare like with like","Use the same device, location, connection type, and node when comparing results. Record download, upload, ping, and jitter together.","Read all four metrics","Understanding Your Speed Test Results","Download speed","How quickly data reaches your device. It affects streaming, web browsing, app downloads, and receiving large files.","Upload speed","How quickly your device sends data. It matters for video calls, cloud backups, livestreaming, and sharing files.","Ping","The HTTP round-trip time between this browser and the test node. Lower latency generally makes interactive tasks feel more responsive.","Jitter","Variation between consecutive latency samples. Lower and steadier jitter is helpful for voice, video calls, and online play.","Use matters more than one magic number","What Is a Good Internet Speed?","A good speed is one that supports every active device with some headroom. Service requirements vary by provider, video quality, household size, Wi-Fi conditions, and upload demand.","Activity","Practical starting point","What else matters","Browsing and email","About 5–10 Mbps per active user","Latency and page complexity","HD video","3–5 Mbps per stream","Stable sustained download","4K video","15 Mbps or more per stream","Provider and video quality","HD video meetings","About 2–4 Mbps up and down","Upload, ping, jitter, and packet loss","Online gaming","Usually modest throughput","Low latency, low jitter, and stability","Multi-device home","Add concurrent demand plus headroom","Router capacity and Wi-Fi coverage","Reference points include Netflix's current","streaming recommendations","and Zoom's","meeting bandwidth requirements",". They are service-specific recommendations, not universal guarantees.","Troubleshoot the path","Why Is My Internet So Slow?","Slow results can come from the internet service, local Wi-Fi, the router, the test device, congestion, or the remote service. Isolate one layer at a time.","Compare Wi-Fi with Ethernet.","A large difference points toward wireless coverage, interference, or router limits.","Move closer to the router.","Walls, distance, and crowded channels can reduce Wi-Fi throughput.","Pause other traffic.","Backups, updates, streaming, and other users share the same capacity.","Restart and update equipment.","Reboot the modem\u002Frouter and check whether its firmware and hardware support the subscribed tier.","Test at several times.","Repeatable evening slowdowns may indicate local or provider-side congestion.","Go deeper","Related Guides","View all guides →","Read the guide →","Common questions","Frequently Asked Questions","Why is my speed test result lower than my internet plan?","Plans are often advertised as “up to” a rate. Wi-Fi conditions, shared traffic, device limits, protocol overhead, congestion, and the route to the test node can all reduce a browser result.","Does this test measure my Wi-Fi signal strength?","No. It measures internet throughput and HTTP latency over whichever connection the device is using. Browsers do not expose router radio strength or channel quality to this page.","Is the ping result an ICMP ping?","No. SpeedTestLab measures HTTP round-trip time to its test endpoint after a warmup request. System ICMP tools can produce different results.","How often should I run a speed test?","Run several tests when investigating a problem: at different times, on Wi-Fi and Ethernet if available, and before and after changing equipment or settings.","Why is my internet so slow?","What is a good internet speed?","Download speed vs. upload speed","How to lower ping",{"title":88,"description":89,"link":90},"Understand Your Internet Speed","Learn what your results mean, what counts as a good speed, and how to improve your connection.","Read the guides →","SpeedTestLab network tool",{"headings":93,"details":99},{"what":94,"how":95,"result":96,"limit":97,"faq":98},"What does this tool measure?","How do I use it?","How should I read the result?","What are the technical limits?","Frequently asked questions",{"wifi-speed-test":100,"download-speed-test":116,"upload-speed-test":132,"ping-test":148,"jitter-test":164,"packet-loss-test":180,"internet-stability-test":196,"network-quality-test":212,"speed-unit-converter":228,"download-time-calculator":244,"speed-test-history":260},{"what":101,"how":102,"result":107,"limit":108,"faqs":109},"A WiFi speed test measures internet throughput on the connection this device is using. It cannot read signal strength, channel congestion, or the radio rate reported by your router.",[103,104,105,106],"Stay connected to the Wi-Fi network you want to test.","Pause large transfers on this device and run the test.","Repeat near the router, then in the room where the problem occurs.","Compare with Ethernet when available to separate Wi-Fi limits from service limits.","Download and upload show delivered internet throughput. HTTP ping and jitter show responsiveness and consistency to this node. A large Wi-Fi-versus-Ethernet gap usually points to the local wireless path.","The browser only sees the active internet path. It does not know the access point, band, channel, signal level, or negotiated Wi-Fi link rate.",[110,113],{"q":111,"a":112},"Why is Wi-Fi slower than Ethernet?","Distance, walls, interference, shared airtime, older client hardware, and router capacity can all reduce Wi-Fi throughput.",{"q":114,"a":115},"Should I test on 2.4 GHz or 5 GHz?","Test the band you normally use. In general, 2.4 GHz reaches farther while 5 GHz can provide more capacity at shorter range, but the actual result depends on the equipment and environment.",{"what":117,"how":118,"result":123,"limit":124,"faqs":125},"This download speed test times real, uncached HTTP response bytes from the SpeedTestLab node. The browser calculates decimal megabits per second from bytes received and elapsed time.",[119,120,121,122],"Pause downloads and streaming that share the connection.","Start the test and keep this tab active.","Run two or three tests instead of relying on one short sample.","Compare the same device and node at different times.","Higher Mbps means this browser received more data per second from this node. Streaming and large downloads depend on sustained speed, while web browsing can also be limited by latency and server response time.","A short browser transfer is not a guarantee of ISP plan speed or performance to every service. Device, Wi-Fi, congestion, route, and node capacity can affect the result.",[126,129],{"q":127,"a":128},"Why does download speed change between tests?","Short-term congestion, Wi-Fi conditions, background activity, routing, and device load all vary. Compare several runs under similar conditions.",{"q":130,"a":131},"Does a high download result guarantee 4K streaming?","No. It provides useful capacity, but the streaming service, sustained stability, Wi-Fi, device, and concurrent traffic also matter.",{"what":133,"how":134,"result":139,"limit":140,"faqs":141},"The upload test creates temporary random bytes in the browser and sends them to the test endpoint. It does not select or upload your personal files.",[135,136,137,138],"Pause cloud backups and file sync.","Start the upload test.","Keep the tab open until the server confirms the received byte count.","Repeat if you are investigating calls, backups, or livestream problems.","Upload Mbps affects how quickly you can send files and how much outgoing capacity is available for video meetings, cloud backup, and live video.","The result covers the route to this node at this time. The server byte count must match the generated payload or the test fails instead of keeping a misleading number.",[142,145],{"q":143,"a":144},"Does the upload test send my files?","No. It sends generated test data only.",{"q":146,"a":147},"Why is upload slower than download?","Many residential plans are asymmetric by design. Wi-Fi, background backups, congestion, and provider provisioning can widen the difference.",{"what":149,"how":150,"result":155,"limit":156,"faqs":157},"This page measures HTTP round-trip time to the SpeedTestLab endpoint. It discards one warmup request and reports the median of the remaining samples. It is not an ICMP ping.",[151,152,153,154],"Pause traffic that could fill the connection.","Start the test.","Review the median HTTP latency and jitter.","Repeat while idle and under normal use to compare responsiveness.","Lower latency usually feels more responsive for calls, remote desktops, and online games. Jitter shows how much consecutive samples vary.","Browser HTTP timing includes connection and application-layer work. System ICMP tools and game-server latency can differ because they use other protocols and destinations.",[158,161],{"q":159,"a":160},"Is this the same as the ping command?","No. The operating-system ping command usually uses ICMP. This browser test uses HTTP requests.",{"q":162,"a":163},"What is a good ping?","There is no universal cutoff. Lower and stable is generally better, and the latency to the service you actually use matters most.",{"what":165,"how":166,"result":171,"limit":172,"faqs":173},"Jitter is variation in latency. SpeedTestLab calculates the average absolute difference between consecutive HTTP round-trip samples.",[167,168,169,170],"Use the connection you want to assess.","Pause heavy transfers.","Start the test and let all latency samples finish.","Repeat during the conditions when calls or games feel unstable.","A low average can still hide occasional spikes, so compare jitter with the individual experience and repeat the test. Voice and live video usually prefer steady timing.","This is HTTP latency variation to one node, not packet-level RTP jitter from a voice call and not a measurement to every game server.",[174,177],{"q":175,"a":176},"Can jitter be high when ping is low?","Yes. The average latency can be low while individual samples vary widely.",{"q":178,"a":179},"How can I reduce jitter?","Pause competing uploads, test by Ethernet, improve Wi-Fi coverage, and check whether the problem occurs only during busy periods.",{"what":181,"how":182,"result":187,"limit":188,"faqs":189},"A normal web page cannot send arbitrary ICMP echo packets. This tool therefore reports failed HTTP probes as an application-path diagnostic and never labels them as IP-layer packet loss.",[183,184,185,186],"Start the probe series.","Keep the tab active while all requests run.","Review failed probes together with HTTP latency and jitter.","Use an operating-system or router diagnostic when true ICMP or interface statistics are required.","A failed HTTP probe means the request did not complete successfully within this browser test. It can be caused by connectivity, timeout, server, browser, or rate-limit conditions.","HTTP probe failures are not interchangeable with network-layer packet-loss percentage. SpeedTestLab does not fabricate ICMP results.",[190,193],{"q":191,"a":192},"Can a browser measure true packet loss?","Not to an arbitrary host with ICMP. Specialized WebRTC tests can measure loss within their own media session, but that is a different scope.",{"q":194,"a":195},"What should I use for true packet loss?","Use trusted operating-system tools, router diagnostics, or a test designed for a specific real-time session.",{"what":197,"how":198,"result":203,"limit":204,"faqs":205},"The stability test samples HTTP round-trip time every 500 milliseconds for 30 seconds by default. It summarizes latency variation and failed requests over that short window.",[199,200,201,202],"Start with other traffic paused for a baseline.","Let the 30-second window finish or stop it at any time.","Repeat while the connection is under normal household load.","Compare wired and Wi-Fi runs when possible.","Consistent samples suggest a stable path to this node during the window. Spikes or failures deserve repetition and comparison; they do not by themselves identify the faulty device or network.","Thirty seconds cannot prove long-term reliability. The maximum supported duration is 120 seconds to control traffic and resource use.",[206,209],{"q":207,"a":208},"How long does the stability test run?","The default is 30 seconds. The implementation caps a run at 120 seconds.",{"q":210,"a":211},"Can I stop the test?","Yes. Stop cancels active requests and keeps any completed partial measurements on screen.",{"what":213,"how":214,"result":219,"limit":220,"faqs":221},"This tool runs the full HTTP test and produces a documented reference score from download, upload, ping, and jitter. It is a convenience summary, not a certified diagnosis.",[215,216,217,218],"Run the full test without heavy background traffic.","Review all four raw measurements first.","Use the score only as a quick summary.","Compare repeated tests under similar conditions.","The score weights download up to 40 points, upload up to 20, HTTP ping up to 25, and jitter up to 15. Missing metrics produce no score rather than a guessed value.","The thresholds are general consumer-use references. They do not account for every application, service, route, data cap, packet-loss condition, or ISP commitment.",[222,225],{"q":223,"a":224},"Is the quality score an industry standard?","No. It is SpeedTestLab’s transparent reference calculation.",{"q":226,"a":227},"Why is there no score after a partial test?","All four required measurements must be present. The site does not replace missing data with zero or invented values.",{"what":229,"how":230,"result":235,"limit":236,"faqs":237},"The converter changes between bit-rate and byte-rate units using decimal SI prefixes. One byte is eight bits, so 100 Mbps equals 12.5 MB\u002Fs before protocol and service overhead.",[231,232,233,234],"Enter a non-negative value.","Choose the source unit.","Choose the target unit.","Copy the converted result if needed.","Lowercase b means bits; uppercase B means bytes. Network plans commonly use Mbps, while file transfers often show MB\u002Fs.","A unit conversion is exact under the stated decimal convention, but it does not predict real download speed or account for overhead.",[238,241],{"q":239,"a":240},"How many MB\u002Fs is 100 Mbps?","12.5 MB\u002Fs using decimal SI units, before transfer overhead.",{"q":242,"a":243},"Is Kbps the same as KB\u002Fs?","No. KB\u002Fs is kilobytes per second and is eight times the equivalent numeric rate in kilobits per second.",{"what":245,"how":246,"result":251,"limit":252,"faqs":253},"The calculator estimates theoretical transfer time by dividing file size in bits by speed in bits per second.",[247,248,249,250],"Enter the file size and its unit.","Enter the measured or planned connection speed.","Choose the speed unit.","Read the theoretical duration and allow extra time for real-world overhead.","The estimate is most useful for comparing sizes and rates. A recent measured download speed is usually more realistic than the maximum number on a plan.","Real transfers can be slower due to overhead, Wi-Fi, server limits, congestion, pauses, and speed changes during the download.",[254,257],{"q":255,"a":256},"Why did my real download take longer?","The formula assumes a constant usable rate. Real transfers include protocol overhead and often vary over time.",{"q":258,"a":259},"Should I enter Mbps or MB\u002Fs?","Use the unit shown with your speed. The calculator converts supported bit and byte rates before calculating.",{"what":261,"how":262,"result":267,"limit":268,"faqs":269},"Speed Test History keeps completed measurements in local storage in this browser. The records are not uploaded to a SpeedTestLab account.",[263,264,265,266],"Run a supported speed test.","Open this page on the same browser and device.","Review or export the local records as CSV.","Delete individual records or clear the list when you no longer need it.","Comparing tests can reveal time-of-day or location patterns, but use similar devices, nodes, and connection types before drawing conclusions.","Clearing site data, using private browsing, changing browser profiles, or switching devices can remove or hide this local history.",[270,273],{"q":271,"a":272},"Is my history uploaded?","No. It stays in this browser’s local storage.",{"q":274,"a":275},"Why is my history empty on another device?","There is no account sync. Each browser profile keeps its own local records.",null,[],1793775154223]