Computer 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 the measurement works
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.
Instead of forcing one fixed download on everyone, the tool adapts: it sends progressively larger payloads and stops the moment the estimate stabilizes.
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.
What the numbers mean
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.
What affects your speed
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.
A few final tips
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
Computer 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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