Fasting Window Calculator

Plan your eating and fasting schedule around your day.

Most popular · 16 h fasting, 8 h eating

12:00

–

20:00

Eating window

8 h eating · 16 h fasting

Fasting window
16 hours
20:00
– 12:00
Stop eating by
8:00 PM
20:00
Suggested bedtime
2.5 h after the last meal
22:30

24-hour timeline

00:0012:00–20:00 eating24:00

16:8 is the most popular protocol. An 8-hour eating window gives flexibility while still giving 16 hours of fasting.