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Set a Timer for 15 Hours
This timer is set to 15 hours. Press Start and the flip clock counts down from 15:00:00 to zero, then an alarm rings. You can pause it at any time and start it again with one click.
15 Hours in Other Units
54,000Seconds
900Minutes
15Hours
What Can You Do in 15 Hours?
Here are some ways to use this timer:
- Intermittent fasting and other daily challenges
- Fermenting dough, pickles or yoghurt
- Waiting for paint, glue or plaster to dry
- Deadlines, reminders and events one or more days away
How to Use the 15 Hour Timer
- Press Start or the space bar to begin the countdown.
- Press Pause to stop the timer and Resume to continue where you left off.
- Press Reset to set the timer back to 15:00:00.
- When the time is up, the alarm rings until you press OK. Choose the sound and the volume in the settings.
- Press F or the fullscreen button to show the timer on the whole screen.
Frequently Asked Questions
How many minutes are in 15 hours?
15 hours is 900 minutes, or 54,000 seconds.
Does the timer keep running in a background tab?
Yes. The timer keeps exact time while you use other tabs or apps and rings when the time is up. Keep this tab open, and on a phone keep the screen on so the browser can play the alarm.
Can I change the time?
Yes. Pick another preset or type your own hours, minutes and seconds under the timer.
Will the timer ring if my computer goes to sleep?
Not while it sleeps: a sleeping device pauses the browser, so the alarm rings when it wakes up. For long timers, plug in your device and keep it awake.