Intermittent fasting comes in a lot of different formats — 16:8, 18:6, alternate-day fasting — and the right one depends heavily on your daily schedule, not just which method sounds most effective. Our intermittent fasting calculator helps you map out an eating window based on your preferred fasting method and typical daily routine.
The fasting window itself matters less than consistency — a schedule you can actually stick to long-term tends to produce better results than a stricter protocol you abandon after two weeks. Many people start with a 12:12 or 14:10 schedule and gradually extend their fasting window as it becomes more comfortable, rather than jumping straight into a longer protocol.
Since what you eat during your eating window still matters, our TDEE calculator can help you set an appropriate calorie target, and our water intake calculator can help you stay properly hydrated throughout your fasting period.