A clean countdown preset for 20 minutes. Start it now or adjust the duration first.
Set a duration and start when ready.
A 20 minutes countdown is one of the most-used timer lengths. Here are practical ways people put20 minutes to work — pick one and press start.
A 20 minutes block is long enough for concentrated study or a home workout.
Use 20 minutes for a power nap, a reading break or a screen rest.
Many roasting and baking steps sit around 20 minutes.
Every WhenKit preset shares the same reliable countdown engine:
The countdown compares against its planned finish time on every tick, so it stays accurate even if the browser throttles background timers.
Switch tabs or minimise the window and the timer keeps the correct remaining time when you return.
Pause to handle an interruption, resume where you left off, or reset back to the original duration in one click.
A visual and audible alert marks the moment the countdown reaches zero, so you never miss the end.
The timer runs entirely in your browser — nothing to download and no account required.
The page URL encodes the duration, so you can bookmark or share this exact timer with one link.
Quick conversions for 20 minutes:
Need a different length? Jump straight to another preset countdown:
20 minutes equals 1,200 seconds. Start it and the countdown runs to zero, then alerts you.
Yes. When the tab becomes active again, the timer compares the current time with its planned finish time to correct any interval drift.
Yes. Use the pause button to stop temporarily, resume to continue, and reset to return to the original duration.
Yes. A visual and audible alert fires when the countdown reaches zero, provided your device volume is on.
Yes. Edit the minutes or seconds before starting to run any custom length; the preset is just a convenient starting point.
No. The timer runs entirely in your browser with no download or sign-up.