Fasting Window Calculator
Pick a fasting method and a start time — see exactly when your eating window opens and closes.
Fasting method
16:8 — 16h fast, 8h eating
14:10 — 14h fast, 10h eating
18:6 — 18h fast, 6h eating
20:4 — 20h fast, 4h eating
When did your fast start? (last food)
Calculate Window
An informational calculator, not medical advice. Fasting is not suitable for everyone — check with a doctor first.