21 Minute Timer

1. Click “Start” to begin the 21-minute countdown.
2. An alert will notify you when 21 minutes have elapsed.
3. Use the “Pause” button to temporarily halt the 21 minute timer.
4. Click “Reset” to restart the timer at 21 minutes.
5. Adjust the duration using the dropdown menus for hours, minutes, and seconds.
6. Toggle sound alerts using the “Sound” button.
7. Enter fullscreen mode by clicking the “Fullscreen” button.

1. Workout intervals: Timing specific exercises or stretching.
2. Cooking tasks: Timing steps in recipes or baking.
3. Study sessions: Short focused study periods.
4. Breathing exercises: Managing relaxation periods.
5. Household chores: Timing quick cleaning tasks.

In 21 minutes…

• Engage in a challenging mental task or puzzle.
• Listen to six average-length songs.
• Complete a pilates session.

A 21-minute timer is equivalent to:

• 0.350000 hours
• 1,260 seconds
• 1,260,000 milliseconds

For a comprehensive time equivalent, including microseconds, nanoseconds, days, weeks, months, and years, please visit our Time Conversion Tool.