Fitness & Wellness Timers

Intermittent Fasting Timer (16 Hour)

Online 16:8 intermittent fasting countdown timer.

16:00:00

Press Space to start or pause · ? for shortcuts

Set the time

Quick picks

Settings

Settings are saved in this browser only.

Share

Put this timer on your website

Need several timers at once? Open Multiple Timers →

Keyboard shortcuts

Space
Start / pause
R
Reset
+
Add 1 minute
E
Edit time
F
Fullscreen
M
Mute / unmute
Esc
Stop alarm / exit fullscreen
?
Show shortcuts

Free Online Intermittent Fasting Timer (16 Hour)

Track your 16-hour intermittent fast or custom fasting window easily.

This is an intermittent fasting timer that opens ready to use. It's preset to 16 hours (16:00:00), and you can change the time with Edit if you need something different.

The ring around the clock gets shorter as time runs down, and the time left also shows in your browser tab. When it reaches zero, a chime plays, so check that your volume is up.

Preset
16 hours (16:00:00)
Custom time
Any hours, minutes and seconds
Alarm
Chime at 00:00

Frequently Asked Questions

What time is the intermittent fasting timer set to?

It opens at 16 hours (16:00:00). Tap Edit to set any other length, from a few seconds up to several hours.

Will the alarm still go off if I switch tabs?

Yes. The timer goes by your device's clock, so it stays on time in a background tab. Keep the tab open and your volume up. On some phones sound won't play while the screen is locked.

Can I use it fullscreen?

Yes. Tap Fullscreen for a large, easy-to-read countdown on a TV, tablet or classroom screen.

Do I need to download anything?

No. It runs in your browser on iPhone, Android, Mac, Windows and Chromebook, and it's free with no sign-up.

Can I share this timer or put it on my website?

Yes. Tap Share to copy a link (it includes any custom time you set), or copy a short code that embeds the timer on your own website or classroom page.

All timers →
Online Timer 5 Minute Timer 30 Minute Timer 10 Minute Timer 1 Minute Timer 15 Minute Timer Pomodoro Timer Pomodoro Timer 20 Minute Timer 3 Minute Timer 2 Minute Timer 25 Minute Timer New Year Countdown 4 Minute Timer 40 Minute Timer 45 Minute Timer 6 Minute Timer 8 Minute Timer Christmas Countdown Christmas Countdown 2 Hour Timer 13 Minute Timer 30 Second Timer 12 Minute Timer

Free Online Intermittent Fasting Timer (16 Hour)

Track your 16-hour intermittent fast or custom fasting window easily.

This is an intermittent fasting timer that opens ready to use. It's preset to 16 hours (16:00:00), and you can change the time with Edit if you need something different.

The ring around the clock gets shorter as time runs down, and the time left also shows in your browser tab. When it reaches zero, a chime plays, so check that your volume is up.

Preset
16 hours (16:00:00)
Custom time
Any hours, minutes and seconds
Alarm
Chime at 00:00

Frequently Asked Questions

What time is the intermittent fasting timer set to?

It opens at 16 hours (16:00:00). Tap Edit to set any other length, from a few seconds up to several hours.

Will the alarm still go off if I switch tabs?

Yes. The timer goes by your device's clock, so it stays on time in a background tab. Keep the tab open and your volume up. On some phones sound won't play while the screen is locked.

Can I use it fullscreen?

Yes. Tap Fullscreen for a large, easy-to-read countdown on a TV, tablet or classroom screen.

Do I need to download anything?

No. It runs in your browser on iPhone, Android, Mac, Windows and Chromebook, and it's free with no sign-up.

Can I share this timer or put it on my website?

Yes. Tap Share to copy a link (it includes any custom time you set), or copy a short code that embeds the timer on your own website or classroom page.

All timers →
Online Timer 5 Minute Timer 30 Minute Timer 10 Minute Timer 1 Minute Timer 15 Minute Timer Pomodoro Timer Pomodoro Timer 20 Minute Timer 3 Minute Timer 2 Minute Timer 25 Minute Timer New Year Countdown 4 Minute Timer 40 Minute Timer 45 Minute Timer 6 Minute Timer 8 Minute Timer Christmas Countdown Christmas Countdown 2 Hour Timer 13 Minute Timer 30 Second Timer 12 Minute Timer