Free timing test — instant play, no signup, no download
Time Estimator asks you to judge how long something lasted, or to produce a given duration without a clock. Subjective time is not a reliable instrument — it stretches with boredom and compresses with engagement — and this game shows you your own bias in numbers.
Either judge the length of an interval, or produce one.
No clock or counting aid is available.
Your error is reported in milliseconds with its direction.
Intervals of different lengths are used.
Your score is your average error across the rounds.
Duration estimation. Bias — consistently long or consistently short — is stable enough to be worth knowing, and correcting for it improves your score immediately.
Do not count. Counting measures your counting rate, which drifts with arousal.
Identify your bias in the first rounds, then correct deliberately for it.
Stay still. Tapping gives you an external rhythm and defeats the point.
Judge by percentage error, not absolute. A 300 ms error on 10 seconds is excellent; on one second it is not.
Attention to time is what makes it feel long. When you are engaged, less attention goes to timing and the interval is remembered as shorter.
For most people, yes, and in a stable direction. Finding your direction is the most useful thing this game tells you.
Stimulants are widely reported to speed subjective time, which makes people produce short intervals. Worth testing on yourself.
Interval Challenge demonstrates a target and asks you to reproduce it. This also asks you to judge durations you were not shown first.