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BMR & Ideal Weight Calculator — Basal Metabolic Rate & 4 Weight Formulas

Basal Metabolic Rate
1,699
calories/day
Calories your body burns at complete rest — never eat below this.

Ideal Weight Range

Devine
70.5
kg
Robinson
68.9
kg
Miller
68.7
kg
Hamwi
72.0
kg
Healthy BMI Range (BMI 18.5–24.9)
56.7 – 76.3 kg
Your Current Weight: 75.0 kg
+5.0 kg over ideal midpoint
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Understand Your Metabolism and Target Weight

This calculator combines two essential health metrics: your Basal Metabolic Rate (BMR) — the minimum calories your body needs at rest — and your ideal body weight according to four established medical formulas.

Four Ideal Weight Formulas Compared

FormulaDevelopedBest For
Devine (1974)Originally for drug dosingMost widely used in clinical settings
Robinson (1983)Modified DevineBetter fit for shorter individuals
Miller (1983)Alternative approachTends to allow slightly higher weights
Hamwi (1964)Oldest formulaQuick clinical estimation

How to Use Your Results

  • BMR: Never eat fewer calories than your BMR for extended periods.
  • Ideal Weight: Use the average of the four formulas as a realistic target. The healthy BMI range (18.5–24.9) provides an additional reference.
  • Difference: Shows how your current weight compares to the average ideal weight from all four formulas.

Frequently Asked Questions

What is BMR (Basal Metabolic Rate)?
BMR is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. We use the Mifflin-St Jeor equation, considered the most accurate BMR formula.
What is the difference between BMR and TDEE?
BMR is calories burned at rest; TDEE (Total Daily Energy Expenditure) includes your activity level. TDEE = BMR multiplied by an activity factor. For TDEE calculations, use our BMI & TDEE Calculator.
Which ideal weight formula is the most accurate?
No single formula is universally "best." The Devine formula is most widely used in medicine (especially for drug dosing). Robinson and Miller provide alternative estimates. We show all four so you can see the range and find a realistic target.
Should I eat below my BMR to lose weight?
No. Eating consistently below your BMR can slow your metabolism, cause muscle loss, and lead to nutritional deficiencies. For safe weight loss, eat below your TDEE but above your BMR, targeting a 300–500 calorie deficit from TDEE.
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