Use this calculator to create a fasting and eating schedule that fits your lifestyle.
Adjust the sliders to set your fasting period, and the eating period will adjust automatically to total 24 hours. Select your start time and click “Calculate Schedule” to view your fasting plan.
Fasting Calculator
Frequently Asked Questions
What is intermittent fasting?
Intermittent fasting is a dietary pattern that alternates between periods of eating and fasting, aiming to improve health and simplify meal planning.
How do I use this calculator?
Set your fasting period using the slider, and the eating period will adjust automatically to total 24 hours. Choose your starting time, and click “Calculate Schedule” to view your fasting plan.
Can I customize the fasting and eating hours?
Yes, the sliders allow you to adjust your fasting and eating hours based on your preferences, as long as they total 24 hours.
What is the best fasting period to choose?
The optimal fasting period varies by individual. Common patterns include 16 hours of fasting with an 8-hour eating window, or 18 hours of fasting with a 6-hour eating window.
What time should I start my fasting schedule?
You can choose any starting time that suits your lifestyle. For example, starting at 8:00 PM means your fasting period will end the next day at noon if you fast for 16 hours.
Can this calculator be used for other fasting regimes?
Yes, this calculator can be used for popular fasting regimes like 5:2 (5 days normal eating, 2 days of reduced calorie intake) or alternate-day fasting by manually adjusting the fasting and eating periods.
What is the OMAD fasting method?
OMAD (One Meal A Day) is a fasting regime where you eat all your calories in one hour and fast for the remaining 23 hours. Set the fasting period to 23 hours and the eating period to 1 hour to plan your schedule.
How does this calculator help with 12:12 fasting?
For 12:12 fasting, set both the fasting and eating periods to 12 hours using the sliders. This method splits your day evenly between eating and fasting periods.