Intermittent Fasting Calculator — Free Fasting Window Timer

Protocol

16:8 16h fast 18:6 18h fast 20:4 20h fast OMAD 23:1 Custom Set hours

Eating window starts

This is when you start eating each day.

AM PM

Today’s schedule

16:8 · eating starts 12:00 PM

Next change in

Today’s schedule

12:00 PM to 8:00 PM

8 hours

8:00 PM to 12:00 PM next day

16 hours

These windows repeat every day.

Not medical advice. This calculator only shows eating and fasting times for the protocol you pick.