How the spacebar counter works
The timer starts on your first press, or when a 3-2-1 countdown reaches zero, and counts every press of the spacebar until time runs out. Your score is presses per second over the window, so the numbers compare across durations. With no time limit, the counter runs until you stop it with Esc or Enter, and your score is the total.
On a phone or tablet, tap the on-screen bar instead; each tap counts as a press.
Held keys don't count
Hold a key down and your operating system starts repeating it, about 30 times a second after half a second's delay. Those repeats arrive marked as repeats, and the counter ignores them, so the only way to score is to press. Your results show how many repeats were thrown away.
Timing and key chatter
Each press is timed with the timestamp the browser gave it when your keyboard delivered it, so a busy page can't slow the count. Two presses closer than 30 ms usually aren't two presses at all but a worn switch bouncing, called chatter; your results point it out if it happens.
Questions
What is a good spacebar speed?
Most people press the spacebar 6 to 8 times a second with one thumb. Alternating two fingers, or tapping with a relaxed wrist, pushes that to 10 or more for short bursts. Over 30 or 60 seconds most people slow down noticeably.
Why doesn’t holding the spacebar count?
When you hold a key, your operating system repeats it automatically. The browser marks those events as repeats, and the counter ignores them, so only real presses count. The results show how many repeats were ignored.
Does the first press count?
Yes. The first press starts the timer and counts as the first of the run, and a press exactly as time runs out belongs to the next run. That way pressing steadily n times a second scores exactly n.
Can I use this on a phone?
Yes. Tap the on-screen bar in the test area. Each tap counts as one press, and double-tap zoom is switched off so no taps are lost.
Why does it say my spacebar might be chattering?
Two presses arrived closer together than a finger can release and press a key. That usually means the switch bounced and registered one press twice, which happens as switches wear. Check the key on its own in the keyboard tester.
Does a mechanical keyboard give a better score?
Not by itself. A lighter switch or a shorter travel can help you press faster, but the counter only sees presses, not how the key is built. Keyboard latency delays every press equally, so it does not change your rate.