30 Minutes Timer
A free, full-screen 30 Minutes countdown with an alarm. Press Start and it counts down from 30 Minutes; when it reaches zero, the alarm sounds.
30:00
How it works
Thirty minutes is the classic study block, a standard half-hour meeting length, and a common target for a steady-state cardio session. It's long enough to get meaningfully into a task past the initial warm-up period, which is part of why it's a default length for both meetings and workouts — short blocks tend to end just as focus is building.
For a study block, pair the timer with a short break afterward rather than chaining several 30-minute blocks back to back with no gap; without a break, sustained focus over 30 minutes tends to decline faster than it would with brief recovery in between.
Common uses
- Running a 30-minute focused study or work block.
- Timeboxing a standard half-hour meeting.
- Timing a steady-state cardio session like a jog or bike ride.
Frequently asked questions
- Does the 30 Minutes timer keep running if I switch tabs?
- Yes. The 30 Minutes countdown is based on the real clock, so it stays accurate in the background and the alarm still rings when time is up.
- Will it make a sound when the time is up?
- Yes — a short alarm beep plays when the countdown reaches zero. Make sure your device isn't muted.
- Is 30 minutes of cardio enough exercise?
- Thirty minutes of moderate-intensity cardio a day covers a commonly cited activity target and provides real cardiovascular benefit. It doesn't need to be continuous — the same total time split into shorter sessions across the day offers similar benefits.
- Why are meetings often scheduled for 30 minutes?
- Thirty minutes is generally enough time to cover one clear agenda item without leaving so much open time that the discussion drifts. It also fits cleanly into a calendar with back-to-back meetings, which is a practical reason it became a default length.