Calculate Your Keto Macros
Enter your stats to estimate daily calories, fat, protein, and carb targets for a ketogenic diet.
What this keto diet macro calculator does
A ketogenic diet works best when your daily intake is built around specific macronutrient targets: very low carbs, adequate protein, and high fat. This calculator gives you a practical starting point based on your body size, activity level, and goal.
Instead of using fixed percentages only, this method first estimates calories and protein needs, then assigns carbs, and finally calculates fat as the “remaining energy.” That makes results more personalized and easier to use in real life.
How the macro calculation works
1) Basal metabolic rate (BMR)
Your BMR is the estimated energy your body uses at rest. This calculator uses:
- Mifflin-St Jeor when body fat is unknown.
- Katch-McArdle when body fat is entered, which uses lean mass for extra precision.
2) Total daily energy expenditure (TDEE)
BMR is multiplied by your activity factor to estimate TDEE, which reflects your average daily calorie burn.
3) Goal adjustment
For fat loss, calories are reduced (usually 10-20%). For muscle gain, calories are slightly increased. Maintenance keeps calories roughly unchanged.
4) Macro split
- Carbs: set directly by you (commonly 20-50 g net).
- Protein: calculated from body weight or lean mass using g/kg.
- Fat: fills the rest of calories after carbs and protein are set.
How to use your macro numbers
Track for consistency, not perfection
Daily intake naturally fluctuates. Try to stay close to your weekly averages instead of obsessing over exact numbers every single day.
Prioritize whole foods
- Protein: eggs, fish, poultry, beef, Greek yogurt
- Fats: olive oil, avocado, nuts, seeds, butter
- Low-carb produce: leafy greens, cucumber, zucchini, mushrooms, broccoli
Electrolytes matter on keto
Many people feel better on keto when sodium, potassium, and magnesium are managed intentionally. Hydration alone is often not enough.
Common mistakes to avoid
- Too little protein: can hurt satiety and muscle retention.
- Accidental carb creep: sauces, snacks, and drinks can add up fast.
- Ignoring calories entirely: keto can help appetite, but energy balance still matters for fat loss.
- Changing everything daily: give your plan at least 2-3 weeks before major adjustments.
When to adjust your macros
Recalculate when your body weight changes by around 4-5 kg, your activity level changes, or your goal changes from cutting to maintenance or gaining.
If progress stalls for 2+ weeks:
- Verify tracking accuracy first.
- Reduce calories modestly (5-10%) for fat loss plateaus.
- Consider a small protein increase if hunger is high.
- Keep carbs low and consistent before assuming keto “isn’t working.”
Final note
This keto diet macro calculator is an educational planning tool, not medical advice. Use it as a baseline, then refine based on weekly trends, training performance, recovery, and how you feel. If you have a medical condition, are pregnant, or take medication, consult a qualified health professional before major diet changes.