20 Minute Timer
Free online 20 minute timer. Large display, loud alert. Perfect for HIIT workouts, EMOM sessions, meditation, naps, and focused work blocks.
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NASA research found that a 20-minute nap improves alertness by 100% and performance by 34%. In fitness, 20 minutes is long enough to trigger meaningful cardiovascular adaptation in HIIT formats.
20 minutes is the science-backed optimal nap length, a standard HIIT or EMOM workout duration, and a popular focused work sprint. It is long enough to enter flow but short enough to fit into almost any schedule.
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