Enter Your Details
Example Data Table
| Profile | Calories | Fat (g) | Protein (g) | Net Carbs (g) | Meals |
|---|---|---|---|---|---|
| Office worker, fat loss | 1,850 | 137 | 105 | 25 | 3 |
| Active adult, maintenance | 2,350 | 176 | 125 | 30 | 3 |
| Trainer, lean gain | 2,750 | 205 | 155 | 35 | 4 |
These examples are illustrative planning cases, not personalized nutrition prescriptions.
Formula Used
1) Basal Metabolic Rate: Mifflin-St Jeor equation estimates resting calorie needs.
Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161
2) Daily Energy Need: TDEE = BMR × activity factor
3) Goal Calories: Target Calories = TDEE × goal multiplier
4) Protein: Protein grams = body weight or lean mass × selected protein factor
5) Net Carbs: Set directly from your keto carb limit
6) Fat: Fat grams = (Target Calories - Protein Calories - Carb Calories) ÷ 9
7) Macro Percentages: Each macro’s calories are divided by total macro calories, then converted to percentages.
How to Use This Calculator
- Choose metric or imperial units.
- Enter age, sex, weight, and height.
- Select your activity level and goal.
- Set your intended calorie adjustment percentage.
- Choose a daily net carb limit for keto.
- Set protein factor based on your training and preference.
- Add body fat only if you want lean-mass-based protein.
- Enter fiber, meals, and water target for better planning.
- Press calculate to see results above the form.
- Use the chart and export buttons to save results.
Frequently Asked Questions
1. What is a keto macro calculator?
It estimates how many daily calories, fat grams, protein grams, and net carbs may fit a ketogenic eating plan based on your body data, activity, and goal.
2. What are net carbs?
Net carbs usually mean total carbohydrates minus fiber. Many keto plans focus on net carbs because fiber has a smaller blood sugar effect than digestible carbohydrates.
3. Why is fat so high on keto?
When carbs are kept low and protein stays moderate, fat fills the remaining calories. That is why keto plans often show a large fat target compared with other diets.
4. Should I use body fat percentage?
Use it if you have a reasonably accurate estimate. It helps calculate protein from lean mass instead of total body weight, which can be useful for some people.
5. Is this calculator good for weight loss?
It can help structure a calorie deficit and macro split. Actual progress still depends on consistency, food quality, adherence, medical factors, and regular monitoring.
6. Why do my fat grams become negative?
That happens when chosen calories are too low for your selected protein and carb targets. Lower protein, reduce carbs, or raise calories until fat becomes positive.
7. How many carbs are usually used for keto?
Many people start around 20 to 30 grams of net carbs daily, but tolerance varies. Your best level may depend on goals, activity, and personal response.
8. Is this medical or nutrition advice?
No. It is an educational planning tool. People with diabetes, kidney disease, pregnancy, eating disorders, or medication concerns should consult a qualified clinician first.