Mobile Data Speed Test
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
Each pass of the measurement reads the payload directly from Cloudflare's edge and times how long the transfer actually takes, so the growing ladder reflects your real throughput rather than a guess.
The ladder starts small enough that even a 5 Mbps connection finishes quickly, then doubles the payload up to 100 MB so multi-gigabit fiber still gets a long enough transfer to converge.
The adaptive ladder is why this test is both quick on slow links and accurate on fiber — it gives each connection exactly the data it needs.
Understanding download vs upload
A higher download number means quicker page loads and smooth 4K streaming; upload matters for video calls, backups and large file sends.
Ping is measured over many small round trips, and the result you see is the median of all of them, so an occasional slow packet does not distort the reading.
Factors that influence results
A test reaches a steady state only after TCP congestion control ramps up, which is why very short downloads can under-report fast connections — this test's ladder avoids that by using progressively larger payloads.
This service measures the path to Cloudflare's edge, which is close to how your ISP peers with the broader internet — a fair general baseline.
Getting the most from the test
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.
Your data stays in your browser for the duration of the test; only a small, anonymous summary is saved afterward, and never the raw payload.
Getting the most from the test
Mobile Data Speed Test 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
This test measures throughput to Cloudflare's edge, not to every service you use. Remote work, gaming or streaming servers may route differently and show different performance.
A speed test measures your connection to our test server, which typically lives on the same backbone your ISP peers with. Speeds to other destinations can vary with routing, server load, and the websites you use.
Related tests & guides
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