Anchor the day
Most schedules become easier when one meal stays stable. Decide whether breakfast or dinner matters more in your routine, then work backward from that anchor.
- 14:10: gentler first step
- 16:8: common daily structure
- 18:6 or 20:4: narrower windows that demand more planning
- OMAD: difficult to meet nutrition needs; not a default
Adjust using recovery signals
Hunger alone can fluctuate, so also watch sleep, training performance, concentration, mood, menstrual health, and medication needs. Worsening recovery is a reason to shorten or stop the fast.
Review after two weeks
Keep the pattern stable long enough to judge logistics, then change one variable at a time. A schedule that works only on perfect days is unlikely to last.
Questions, answered plainly
Is an earlier eating window better?+
Some evidence favors alignment with circadian rhythms, but adherence and individual circumstances matter. A repeatable, nutritionally adequate schedule is the practical priority.
Do I need the same schedule every day?+
No. Consistency helps evaluation, but social and training days can use different windows if the overall pattern remains workable.
Do I need an account to use the calculator?+
No. The web calculators are free and run in your browser without an account.
Sources and further reading
Sources behind the formulas and explanations.