Reaction tests

Measure your reflexes in milliseconds: classic reaction time test and Formula 1 start lights.

Reaction time test Wait for the screen to turn green, then click, tap or press a key. Five tries give you an average, a best time and a fair comparison. 5 tries
F1 reaction test Five red lights, one per second. When they all go out, go. React too early and it is a jump start. 5 lights

The reaction time test is the classic one: wait for green, click as fast as you can, five times. The F1 test copies a race start: five red lights, then go the moment they go out, without jumping the start.

Both give you an average in milliseconds and show where you stand among other players. Your screen and mouse add their own delay, so compare yourself on the same setup.