Sixteen hours fasting, eight hours eating — the most popular daily rhythm in the world. Enter when you stopped eating and find out exactly when your window opens.
Your 16-hour window opens at —
Why 16:8 works for so many people: eight of the sixteen hours are usually sleep. You're really only skipping breakfast — and many people find mornings are the easiest hours to fast once the rhythm sets in.
A typical 16:8 day (last meal 8pm): the hungriest stretch is often hours 9–11 (around 5–7am, while you're asleep or just waking). By noon, most people are running on stored fuel and the window opens right on schedule.
Fluent Fast never tells you to push past your plan. Sixteen hours is a routine, not a record.
Save this 16:8 schedule in Fluent Fast — free forever, no account needed.
Save this schedule →More calculators: 18:6 · 20:4 · OMAD · 36-hour · Start time · How long?
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