Intermittent Fasting Meal Planner
Build a personalized intermittent fasting schedule. Choose your protocol (16:8, 14:10, 5:2, or OMAD), get your exact eating window, calorie targets, and a sample meal plan — all for free.
What Is Intermittent Fasting?
Intermittent fasting (IF) is an eating pattern that cycles between periods of fasting and eating. Unlike traditional diets that focus on what you eat, IF focuses on when you eat. The most popular methods are 16:8 (fast 16 hours, eat within an 8-hour window), 5:2 (eat normally 5 days, restrict calories on 2 non-consecutive days), and OMAD (one meal a day).
This meal planner helps you structure your fasting schedule by calculating:
- Your daily calorie target based on your BMR, activity level, and goal.
- Your exact eating window — the start and end times for your meals.
- Your fasting duration in hours, visualized on a 24-hour timeline.
- Your protein target to help preserve muscle mass while fasting.
- A sample meal plan with meal ideas and timing that fit your protocol.
How Does the Intermittent Fasting Meal Planner Work?
The planner first estimates your daily calorie needs, then adapts the schedule to your chosen fasting protocol:
Step 1 — Basal Metabolic Rate (BMR):
Mifflin-St Jeor (men): BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Mifflin-St Jeor (women): BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
Katch-McArdle (if body fat % given): BMR = 370 + 21.6 × lean body mass(kg)
Step 2 — Total Daily Energy Expenditure (TDEE):
TDEE = BMR × activity multiplier (1.2 – 1.9)
Target calories = TDEE − 400 (lose fat) or TDEE + 400 (build muscle)
Step 3 — Protocol adaptation:
16:8, 14:10, 18:6: eating window = (24 − fasting hours) hours
5:2: 5 normal days at target calories; 2 fasting days at ~500–600 kcal
OMAD: one meal within a 1-hour window
Protein target = weight (kg) × 1.6 g/kg (to preserve muscle while fasting)
The 24-hour timeline visual shows exactly when you fast and when you eat, so you can plan your day around your eating window.
Why Use This Intermittent Fasting Meal Planner?
- Protocol flexibility: Supports 14:10, 16:8, 18:6, 5:2, and OMAD — choose what fits your lifestyle.
- Personalized schedule: Your eating window adjusts to your chosen start time.
- Calorie & protein targets: Know exactly how much to eat to reach your goal.
- Sample meal plan: Get meal ideas with timing and approximate macros for your protocol.
- Visual timeline: See your fasting and eating periods at a glance.
- Free & Private: No registration, no data storage.
Understanding Your Fasting Plan Status
- Balanced Plan: Your calorie target and fasting window are well within healthy ranges.
- Aggressive Plan: Your calorie deficit is large or your fasting window is very long — monitor how you feel.
- Beginner-Friendly: A 14:10 or 16:8 protocol with a moderate deficit is a safe starting point.
Note: Intermittent fasting is not suitable for everyone. Pregnant or breastfeeding women, children and teenagers, people with a history of eating disorders, and those with certain medical conditions should consult a healthcare professional before starting.
Which Protocol Should I Choose?
- 14:10: The easiest entry point. Fast 14 hours, eat within 10 hours. Great for beginners.
- 16:8: The most popular protocol. Fast 16 hours, eat within 8 hours (e.g. 12 pm – 8 pm).
- 18:6: More advanced. Fast 18 hours, eat within 6 hours. Better for experienced fasters.
- 5:2: Eat normally for 5 days, restrict to 500–600 kcal on 2 non-consecutive days. Flexible and effective.
- OMAD: One meal a day within a 1-hour window. Very restrictive — best for experienced fasters.
❓ Intermittent Fasting Meal Planner FAQ
What is the best intermittent fasting protocol for beginners?
14:10 is the easiest starting point. Fast for 14 hours and eat within a 10-hour window. Once comfortable, you can gradually move to 16:8. Starting slowly reduces hunger and headaches.
Can I drink coffee or tea while fasting?
Yes. Black coffee, unsweetened tea, and water do not break a fast. Avoid adding sugar, milk, or cream, as these contain calories that will break your fast.
How many meals should I eat on 16:8?
Most people eat 2–3 meals within the 8-hour window. A common pattern is a first meal around 12 pm, a snack around 3 pm, and dinner before 8 pm. The calculator recommends the number of meals based on your protocol.
What can I eat on 5:2 fasting days?
On fasting days, aim for 500–600 calories of nutrient-dense food: lean protein (chicken, fish, eggs), plenty of vegetables, and small portions of whole grains. Avoid processed foods and sugary drinks.
How much protein should I eat while intermittent fasting?
Aim for about 1.6 g of protein per kg of body weight to help preserve muscle mass. The calculator provides your personal protein target based on your weight.
Can I exercise while fasting?
Light exercise (walking, yoga) is fine during the fasting window. For intense workouts, it's better to train within your eating window or shortly before it opens, so you can refuel with protein and carbs afterward.
Does intermittent fasting work for weight loss?
IF can support weight loss because it helps reduce overall calorie intake and may improve insulin sensitivity. However, weight loss ultimately depends on a calorie deficit. The calculator gives you a calorie target to support fat loss.
Is OMAD safe?
OMAD is very restrictive and not recommended for beginners. It can be difficult to meet your nutrient needs in one meal. If you try it, ensure your single meal is nutrient-dense and covers your protein, vitamin, and mineral needs.
Who should not try intermittent fasting?
Pregnant or breastfeeding women, children and teenagers, people with a history of eating disorders, and anyone with a medical condition (especially diabetes or kidney disease) should consult a doctor before starting IF.
How long until I see results from intermittent fasting?
Some people notice reduced bloating and better energy within 1–2 weeks. Visible fat loss typically takes 4–8 weeks of consistent practice combined with a calorie deficit.
Can I switch between protocols?
Yes. Many people use 16:8 on weekdays and a more relaxed schedule on weekends, or alternate between 16:8 and 5:2. The best protocol is one you can sustain long-term.
How do I convert measurements between metric and imperial?
This calculator automatically converts between metric and imperial units. Simply select your preferred unit system, enter your measurements, and the calculator handles the conversions for you.