Test My Internet Speed
Use the free test below to measure your connection right now. It adapts to your speed and finishes in under a minute.
How this speed test works
This test starts with a short latency probe, then downloads test data from Cloudflare's edge in increasing amounts until it can estimate your connection confidently. Slow links stop early; gigabit links scale up to get a stable reading.
The measurement engine begins with tiny requests and grows the transfer size stepwise, so the total data moved is close to the minimum needed for a confident number.
Adaptive testing also means the test is gentle on mobile data plans: it stops transferring as soon as the estimate is statistically stable.
Understanding download vs upload
Download speed is usually the biggest number on a result screen because most plans are asymmetric, and it is the figure most ISPs advertise most loudly.
Some jitter is normal on any connection; very high jitter (roughly 20 ms or more of variation) is what you'll notice as choppy calls or rubber-banding in games.
Factors that influence results
Whether you test over Wi-Fi or Ethernet, the distance to your router, how many devices share the connection, and whether your ISP throttles specific traffic can all move the numbers.
Testing against Cloudflare's anycast network gives a realistic picture of real-world throughput because the measured path is short and well-connected.
Getting the most from the test
This test is free, requires no account, and never shows ads while it runs — the only goal of the measurement is to give you a trustworthy number as quickly as possible.
The result screen labels the server you measured against, so you always know exactly what path a number represents before you compare it with anything else.
Run the test a few times over a few days before drawing conclusions. One-off speeds are noisy; a median of several runs is a much more reliable picture of your connection.
Making the result useful
Test My Internet Speed is built to run on your connection in under a minute — press start, read the four numbers, and compare them with what your plan promises.
Speed test limitations
Wi-Fi adds its own variability. If your wired connection is much faster than your Wi-Fi, the bottleneck is your wireless link, not your ISP — and that is worth knowing before you call your provider.
Upload speeds can be throttled or capped separately from downloads on some plans, so a fast download with a slow upload is often the plan working as designed rather than a fault.
Related tests & guides
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