How accurate is the average person?

For short durations of a few seconds, people are often within ten to fifteen percent of the target once they settle in. Longer targets are harder to judge and errors grow. Counting in your head helps, but the test varies the target so you cannot lean on a fixed rhythm.

Why does the clock disappear?

The whole point is to measure your own sense of time, so any visible timer, bar or countdown would give the answer away. During each round you see nothing but a stop button.

Does caffeine or mood affect time perception?

They can. Feeling alert or anxious tends to make time feel like it passes faster, so you may stop late, while boredom can make it drag. Trying the test in different states is a fun way to notice the shift.

Time Perception Test

You are given a target like seven seconds, then you start and stop a hidden timer when you think the time has passed. This free time perception test hides the clock completely, so you rely on your internal sense of time. It runs five rounds with different targets and scores your average error. Nothing is uploaded and there is no sign-up.

Test your time perception, the internal clock that tells you how long a moment lasts. You are given a target duration, then you press start and press stop when you think that many seconds have gone by, with no clock, bar or ticking to help you. Across five rounds with different targets, it measures how far off you are on average. It is a quick way to see how accurate your sense of time is, and whether you tend to run fast or slow.

No sign-up, ever
100% free
Nothing uploaded
Works offline after first load
Scores stay on your device

Read the guide: How to Judge Time Without a Clock

5 roundsBest: —

Time Perception TestFive rounds. Each names a target like “7 seconds”. Hit Start, then Stop when you feel that long has passed — no clock, no ticking.

How to use it

1
See the target

Each round names a duration to estimate, like ten seconds. The target changes so you cannot settle into one rhythm.
2
Start, then stop

Press start and the clock vanishes. Press stop the moment you feel the time is up, counting however you like in your head.
3
See how close you were

Each round shows your time against the target. After five rounds you get your average error as a percentage.

When it comes in handy

Test your internal clock

Find out how accurately you can judge a stretch of time without counting on a device.

Fast or slow?

See whether you tend to stop early or late, a small window into how your sense of time runs.

A calm focus drill

Estimating time steadily takes quiet attention, so it doubles as a short focus exercise.

Instant & 100% private — nothing is uploaded

Every game runs right here in your browser, and your best scores are kept on your own device. Nothing is sent to a server, so there is no sign-up and no account. Load the page once and it keeps working even if you go offline.

Frequently asked questions

How accurate is the average person?: For short durations of a few seconds, people are often within ten to fifteen percent of the target once they settle in. Longer targets are harder to judge and errors grow. Counting in your head helps, but the test varies the target so you cannot lean on a fixed rhythm.
Why does the clock disappear?: The whole point is to measure your own sense of time, so any visible timer, bar or countdown would give the answer away. During each round you see nothing but a stop button.
Does caffeine or mood affect time perception?: They can. Feeling alert or anxious tends to make time feel like it passes faster, so you may stop late, while boredom can make it drag. Trying the test in different states is a fun way to notice the shift.

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How to use it

See the target

Start, then stop

See how close you were