24 Minute Timer
Free online 24 minute timer with alarm.
⏱️ 24 Minute Timer: Start a free 24-minute countdown timer instantly — no downloads, no sign-up. Just click Start.
Why use a 24-minute timer?
A 24-minute timer is useful when standard intervals (Pomodoro 25, ultradian 90, NASA nap 26) don't quite match your task. Sits between the 20-minute (4 min above) and 25-minute (1 min below) standards.
What people use a 24-minute timer for
Single-Pomodoro block
Larger than the canonical 25-minute Pomodoro, this 24-minute interval suits slightly deeper work.
Focused study
24-minute of study covers one substantial concept without fatigue.
Workout session
Most "minimum effective" cardio research sits at 20-30 minutes; 24-minute is in this sweet spot.
Cooking
Roast vegetables, baked dishes, and slow-cooker prep often peak in this 24-minute range.
Test prep mock
Many practice test sections run roughly 24-minute long.
The 24-minute interval, in context
Around 24-minute is where productivity research finds the inflection point: long enough to recover from interruptions (avg 23-min recovery cost), short enough to sustain focus.
Sits between the 20-minute (4 min above) and 25-minute (1 min below) standards.
About the 24 Minute Timer
Free online 24 minute timer with alarm.
Related
Frequently asked questions
Why use a 24-minute timer specifically?
24-minute blocks fit the canonical Pomodoro pattern, single test sections (most AP and SAT subsections fall here), guided meditation cycles, and sustained-work blocks for older students or focused adults. Long enough for deep work, short enough to maintain attention.
Does the 24-minute timer keep accurate time?
Yes. The 24-minute countdown uses monotonic time, so DST transitions, system clock changes, or tab backgrounding do not throw it off. End-of-window accuracy is within a fraction of a second across the full interval.
Should I take a break after each 24-minute session?
Yes. Research on the Pomodoro Technique and ultradian-rhythm work (Sonnentag, 2018) shows that breaks after 24-minute blocks restore the same prefrontal-cortex resources that sustained focus depletes. Skip the break and your next block performs measurably worse.
What happens when the 24-minute timer reaches zero?
The alarm plays and the page flashes. For 24-minute sessions you have likely shifted attention to other work — that audio cue is what brings you back. The alarm is loud enough to be noticeable across a room without being startling.