Advanced Maintenance Calorie Calculator

Example Maintenance Calorie Scenarios

Illustrative examples only. Values rounded using Mifflin-St Jeor with common activities.

Formulas Used

Mifflin-St Jeor Equation

Male: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Female: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161

Harris-Benedict Equation (Revised)

Male: BMR = 13.397 × weight(kg) + 4.799 × height(cm) − 5.677 × age + 88.362
Female: BMR = 9.247 × weight(kg) + 3.098 × height(cm) − 4.330 × age + 447.593

Katch-McArdle Equation

BMR = 370 + 21.6 × Lean Body Mass(kg), where Lean Mass = weight × (1 − body fat% / 100).

Activity Multipliers (TDEE)

TDEE = BMR × Activity Factor
Sedentary: 1.2, Light: 1.375, Moderate: 1.55, Active: 1.725, Very Active: 1.9

How to Use This Maintenance Calorie Calculator

1. Enter your sex, age, weight, and height in preferred units.
2. Optionally enter body fat percentage for advanced BMR estimation.
3. Select your regular activity level matching weekly training and lifestyle.
4. Choose primary formula or keep recommended default for reliability.
5. Pick maintain, lose, or gain, and set weekly rate if applicable.
6. Select macro style or define custom percentages totaling one hundred.
7. Calculate, then export personalized results via CSV or PDF instantly.

For clinical conditions, pregnancy, or high-performance athletics, always consult a qualified professional before implementing aggressive nutrition changes.

Typical Maintenance Ranges by Activity Level

Approximate maintenance calories per kilogram of body weight.

• Sedentary: 28–30 kcal/kg/day
• Lightly active: 30–33 kcal/kg/day
• Moderately active: 33–36 kcal/kg/day
• Very active: 36–40+ kcal/kg/day

Recommended Safe Weekly Weight Change Targets

• Fat loss: 0.25–1.0 kg/week using modest, sustainable deficits.
• Muscle gain: 0.1–0.35 kg/week with slight surpluses.
• Aggressive changes increase risk of muscle loss or rebound.

Sample Macro Plans for Different Goals

• General health: 20–25% protein, 45–55% carbs, 25–30% fat.
• Fat loss focus: 25–35% protein to support fullness, retention.
• Strength training: 25–30% protein, adequate carbs around sessions.

When to Recalculate Your Maintenance Calories

• Every 3–6 kg body weight change.
• When training volume or job activity significantly changes.
• After long plateaus despite strict tracking and consistency.

Frequently Asked Questions

1. What are maintenance calories?

Maintenance calories are the daily energy your body needs to keep your current weight stable, considering basal metabolism and regular activity, without intentional fat loss or gain.

2. How accurate is this maintenance calorie calculator?

The calculator uses validated prediction formulas. Results are estimates; individual metabolism, genetics, medical conditions, and tracking consistency can shift true needs above or below predicted values.

3. Which formula should I choose for my results?

Mifflin-St Jeor suits most adults. Harris-Benedict offers similar estimates. Katch-McArdle is helpful when body fat is known, especially for lean or muscular individuals tracking composition closely.

4. How often should I adjust my calorie target?

Track body weight trends for at least two weeks. If results consistently differ from expectations, adjust by 100–200 calories and reassess trends before changing again.

5. Why is my real maintenance different from the estimate?

Differences arise from genetic variation, non-exercise movement, tracking inaccuracies, fluid shifts, medications, sleep, and hormones. Use the number as a starting reference, then refine with real-world feedback.

6. Can I use this for bulking or cutting phases?

Yes. Find maintenance, then apply controlled surplus for muscle gain or deficit for fat loss. Pair with suitable macros, resistance training, recovery, and regular progress monitoring.

7. Is this calculator suitable for everyone?

This tool is not designed for pregnancy, breastfeeding, serious illness, disordered eating, or children. Such cases require individualized guidance from qualified healthcare or nutrition professionals.