16:8 fasting timer
A live 16:8 fasting timer in this browser. A common window is noon to 8pm (16 hours fasting, 8 hours eating). No app store, no signup, no time cap. Not medical advice.
Free. No signup. Runs in this browser.
The timer widget on this page is pre-selected for this protocol. Use Start Fast when JavaScript is on.
Questions
What is 16:8?
16:8 means about 16 hours without calories and an 8-hour eating window. It is a daily time-restricted pattern, not a 48-hour fast.
What is an example 16:8 window?
Noon to 8pm is a common example. 10am to 6pm or 12pm to 8pm are the same duration on a different clock. Fit the window to sleep and shared meals.
Can I drink water or coffee?
Water is the default during the fasting stretch. Black coffee or unsweetened tea are optional. Drinks with meaningful calories end a strict fast.
What happens when the 8 hours opens?
The eating window is when you eat. This timer is a clock, not a lock. End Fast when you eat, or sooner if you should stop.
Is this medical advice?
No. It is a browser timer. It cannot see your medicines or labs. If you are pregnant, under 18, underweight, or managing diabetes or an eating disorder, do not treat Start as clearance.
Do I need an app?
No. This page is the timer. You can install it to the home screen later if you want. That is optional.