What does the number measure?

The time a small request takes to go from this browser to our London address and back. The check sends two warm-up requests, then times ten more and shows the median, the typical figure, with the fastest, the slowest and the spread between them.

Is this my ping in a game?

It is the first part of it. Players connect through the same London address, and game traffic goes on from there to the machine the server runs on, which adds a little more. Wi-Fi and anything else using your connection add their own time too.

Why does it change each time I run it?

Each request takes its own path through your connection and the networks in between, so the times vary. The spread shows how much they varied in this run. Run it a few times, at the hour your group usually plays, for a typical figure.

What does the check send?

It asks our site twelve times about the small icon file every page of ours loads, and times each answer. The result stays in this browser.

Free tool

Check your connection to our servers

How long a small request takes to reach our London address from this browser and come back, timed ten times. Players connect to their servers through that address, so this is the first part of the trip your game traffic makes.

Checked against Microsoft's published round trips between its data centres, updated 20 August 2026, on 12 November 2026. Sources: Microsoft: Azure network round-trip latency statistics.

Getting ready

Median of 10 round trips

Fastest: -
Slowest: -
Spread: -

Each request

One request
The median
From fastest to slowest

Runs in your browser

This check times ten small requests from your browser to our London address and shows the median, the typical figure. It runs with JavaScript: turn it on and reload the page to see your reading here.

What the reading covers

This browser
What this check times
Our London address
Game traffic goes on from here, which adds a little more
The machine your server runs on

Reference

Round trips between data centres

For a sense of distance, Microsoft publishes the median round trip between its own data centres. These are data centre to data centre figures: a home connection adds its own time on top.

Median round trip from Microsoft's UK South region, data centre to data centre
From	To	Median round trip
UK South	East US	78 ms
UK South	Central US	108 ms
UK South	West US 2	139 ms

Source: Microsoft, Azure network round-trip latency statistics, updated 20 August 2026.

Questions

Questions and answers.

What does the number measure?: The time a small request takes to go from this browser to our London address and back. The check sends two warm-up requests, then times ten more and shows the median, the typical figure, with the fastest, the slowest and the spread between them.
Is this my ping in a game?: It is the first part of it. Players connect through the same London address, and game traffic goes on from there to the machine the server runs on, which adds a little more. Wi-Fi and anything else using your connection add their own time too.
Why does it change each time I run it?: Each request takes its own path through your connection and the networks in between, so the times vary. The spread shows how much they varied in this run. Run it a few times, at the hour your group usually plays, for a typical figure.
What does the check send?: It asks our site twelve times about the small icon file every page of ours loads, and times each answer. The result stays in this browser.

Next steps

Check your connection to our servers

Round trips between data centres

Questions and answers.

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