Science-Based Formula

Calculate Your Daily Calories in 30 Seconds

Get your personalized calorie target for weight loss, muscle gain, or maintenance

Mifflin-St Jeor equation Instant results 100% free

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Quick Guide

Weight Loss: 20% calorie deficit for 0.5kg/week loss

Maintenance: Eat at your TDEE to maintain weight

Muscle Gain: 10% surplus for 0.25kg/week gain

Understanding Calorie Calculations

BMR vs TDEE

BMR is calories burned at rest. TDEE is BMR multiplied by your activity level, representing total daily energy needs.

Calorie Balance

Weight loss requires a deficit (eat less than TDEE). Muscle gain requires a surplus (eat more than TDEE). Maintenance equals TDEE.

Tracking Progress

Monitor weekly weight averages, not daily fluctuations. Adjust calories based on 2-4 week trends for best results.

Complete Your Nutrition Plan

Macro Calculator

Calculate your protein, carbs & fats breakdown

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TDEE Calculator

Total Daily Energy Expenditure analysis

Calculate TDEE

BMI Calculator

Body Mass Index health assessment

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Mastering Your Calories: Strategy Guide by Goal

Knowing your calorie number is just the start. What separates successful transformations from failed diets is understanding how to use those calories strategically based on your specific goal.

Fat Loss Strategy

-10% to -20%
Below maintenance

A moderate deficit of 300-500 calories creates fat loss while preserving muscle. Anything more aggressive risks muscle loss, hormonal issues, and metabolic adaptation.

  • Rate: 0.5-1% bodyweight per week
  • Protein: 0.8-1g per lb bodyweight
  • Training: Maintain strength, add cardio
  • Avoid: Extreme deficits below 1200 cal

Muscle Gain Strategy

+10% to +20%
Above maintenance

A controlled surplus of 200-400 calories provides the energy for muscle growth without excessive fat gain. Your body can only build muscle so fast - more isn't better.

  • Rate: 0.25-0.5% bodyweight per week
  • Protein: 0.7-0.8g per lb bodyweight
  • Training: Progressive overload focus
  • Avoid: Dirty bulking, excessive surplus

Maintenance Strategy

±5%
At maintenance

Eating at maintenance allows for body recomposition - slowly building muscle while losing fat. Perfect for beginners or after aggressive dieting phases.

  • Rate: Stable weight, changing composition
  • Protein: 0.8g per lb bodyweight
  • Training: Consistent strength training
  • Avoid: Impatience, expect slow progress

Common Calorie Mistakes That Kill Progress

What Doesn't Work:

  • Extreme deficits: Eating 800-1000 calories "for faster results"
  • Not tracking: "I'll just eat less" without measuring
  • Ignoring protein: Only focusing on total calories
  • Weekend binges: Perfect weekdays, destroying progress on weekends

What Actually Works:

  • Moderate deficits: 300-500 calories below maintenance
  • Consistent tracking: Weighing food for 2-4 weeks minimum
  • High protein: 0.7-1g per lb bodyweight daily
  • 80/20 consistency: Perfect most days, flexible sometimes

Your Calorie Target Is Your Starting Line, Not Your Finish Line

The calculator gave you a number. Now comes the real work: hitting that target consistently, tracking your results weekly, and adjusting based on real-world feedback. That's how transformations happen - not through perfect calculations, but through consistent execution and intelligent adjustments.