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Intermittent Fasting Calculator

Find your fasting & eating windows based on your schedule and goal

⏰ 6 Protocols🎯 Goal Based📊 All Experience Levels
⚠️ Important Safety Warning — Please Read First
Intermittent fasting is not suitable for everyone. Do not start any fasting protocol if you:
  • Have diabetes (Type 1 or Type 2) or blood sugar issues
  • Are pregnant or breastfeeding
  • Have a history of eating disorders
  • Take regular medication that must be taken with food
  • Have low blood pressure, kidney disease, or liver disease
  • Are under 18 or are underweight
🩺 Special Note for Diabetics
If you have diabetes, fasting can cause dangerous drops in blood sugar (hypoglycemia), especially if you take insulin or certain oral medications. The timing of your meals is directly tied to your medication schedule. Always consult your doctor before changing your eating schedule. If your doctor approves fasting, the 14:10 Gentle Fast is generally the safest starting point — it only extends your overnight fast by a small amount.
🎯 Which Protocol Is Right For Me?
Answer 2 quick questions and we'll recommend the best starting point
Have you tried intermittent fasting before?
Choose Your Protocol
Select the fasting method that fits your lifestyle
16:8
Leangains
Most popular & beginner friendly
Most Popular
18:6
Warrior Light
Faster results, more discipline
20:4
Warrior
Advanced — one main meal
Advanced
14:10
Gentle Fast
Great for beginners & women
Beginner Friendly
5:2
5:2 Diet
Normal eating 5 days, 500 cal x 2
OMAD
One Meal
One meal per day — extreme
Extreme
Your Eating Window Start
What time do you want to start eating each day?
Your Primary Goal
We'll show you the benefits most relevant to you