Calorie & Macronutrient Calculator

Basic inputs
Sex used for BMR formula 

Your Daily Goal

BMI (Body Mass Index) 0
BMI Category 0
Basal Metabolic Rate (BMR) 0
Total Daily Energy Expenditure (TDEE) 0
Adjusted Macro Weight 0
Protein 0
Protein per kg of weight 0
Fats 0
Carbs 0
Estimated Weight Change 0
RECOMMENDED DAILY INTAKE 0

Calculation explanation and practical guides

How to use the Calorie & Macro Calculator

This calculator acts as a science-informed starting point for your nutrition. It calculates a reasonable daily energy target and divides it into practical protein, fat, and carbohydrate targets. Use the output as a practical foundation, and adjust it later based on real-world weight trends and your energy levels.

What the calculator guards and what is up to you: We built several safety nets into the tool. The algorithm prevents your recommended intake from dropping below your Basal Metabolic Rate (BMR), guards a healthy hormonal minimum for fats, and increases protein during a deficit to protect muscle mass. However, no mathematical model can account for your actual daily activity level, potential metabolic adaptation from past diets, or specific physiological conditions. A calculator can never replace listening to your own body.

Note: This calculator is designed for adults. BMI categories are general screening categories and do not diagnose health status or body composition.

  1. Enter your basic metrics. Sex, age, height, and weight are used to estimate your Basal Metabolic Rate (BMR) – the energy your body burns at absolute rest.
  2. Enter body fat % (optional). If you enter your body fat percentage, the calculator can use a lean-mass-based estimate. This may be more appropriate for very muscular individuals or people with a higher body-fat percentage, but it is still only an estimate.
  3. Select your activity level. Your BMR is multiplied by this coefficient. Pro tip: Do not overestimate your activity, or your recommended intake will be too high.
  4. Understand the BMR Safety Net. When cutting weight, we apply a percentage deficit, but our algorithm has a built-in safety net: we never let your recommended calories drop below your BMR. This acts as a conservative safety check and helps avoid unrealistically low calorie targets.
  5. Dynamic Macro Scaling. We calculate protein strictly based on your body weight (g/kg). This helps keep protein targets more realistic across different goals, especially during weight loss or muscle-gain phases.
  6. Track and verify. Log these targets into your favorite food tracker, stick to them for 2 to 4 weeks, and observe how your body reacts.

Choosing the Right Macro Split

Our tool is built on modern sports nutrition science (e.g., ISSN guidelines). Your macronutrient needs are dictated by your weight and goal, not by outdated percentage pie charts.

  1. Standard is the most universal choice. It leaves ample room for carbs, maintains a healthy fat baseline, and provides enough protein for the non-exercising population. Perfect if you don't want to restrict typical side dishes.
  2. Sport / Fitness smartly protects your muscles. This mode utilizes our adaptive logic: if you are in a caloric deficit, it automatically increases your protein target per kg to help support muscle retention during a calorie deficit. If you are in a surplus (bulking), it keeps protein at a reasonable level, knowing the caloric surplus itself is muscle-sparing.
  3. Low-carb is an alternative, not a magic pill. This purposely reduces carbs and backfills energy with dietary fats. It helps some people manage satiety and sugar cravings. However, weight loss is still entirely dependent on the overall caloric deficit.
  4. Carbs are not the enemy. If you train hard, carbs are your primary fuel. The Sport / Fitness variant preserves enough carbs to ensure you can perform.
  5. Practical Fat Minimum. We aim to keep fats within a practical minimum range (approx. 0.8 g per kg of your weight), because dietary fats support normal hormonal function and absorption of fat-soluble vitamins.

Taking Action on Your Numbers

Treat this output as a rough practical starting point. No online calculator can perfectly map your daily spontaneous movements, genetics, or metabolic adaptations. It’s an ideal starting line.

  1. Focus on the main calorie target. If your goal says 2,100 kcal, you don't need to hit exactly 2,100. Aiming for a range between 2,000 and 2,200 kcal is a sustainable, practical approach.
  2. Treat macros as guidelines, not a prison. Try to hit your protein goal as accurately as possible (or slightly exceed it) for muscle recovery and satiety. You can be more flexible with the ratio of fats to carbs based on your daily cravings or training intensity.
  3. Log the numbers. Manually enter these targets into a calorie-tracking app (like MyFitnessPal, MacroFactor, or Yazio).
  4. Monitor the trend, not the day. Body weight naturally fluctuates due to water retention, sodium intake, or digestion. Weigh yourself regularly under similar conditions (morning, empty stomach), but only judge progress based on your weekly averages.
  5. Evaluate after 2–4 weeks. If you are losing weight at the expected pace and feel good, change nothing. If your weight stalls, your actual energy expenditure is likely lower than calculated, or your intake is higher than you think.
  6. Don't just rely on the scale. Especially in the Sport / Fitness mode, you might be losing fat while simultaneously building muscle. The scale might not move, but your waist measurements will shrink. Measure your waist!