Calculate daily calorie needs using the Mifflin-St Jeor equation. The most accurate BMR formula for weight management planning.
Formula
const weightKg = inputs.weight / 2.20462; const heightCm = ((inputs.feet * 12) + inputs.inches) * 2.54; const age = inputs.age; let bmr = (10 * weightKg) + (6.25 * heightCm) - (5 * age); if (inputs.gender === 0) { bmr += 5; } else { bmr -= 161; } const tdee = bmr * inputs.activity; return { maintain: Math.round(tdee), loss: Math.round(tdee - 500), gain: Math.round(tdee + 300), _chart: { type: 'bar', data: [{name: 'Weight Loss', value: Math.round(tdee - 500)}, {name: 'Maintenance', value: Math.round(tdee)}, {name: 'Weight Gain', value: Math.round(tdee + 300)}] } };Gender
0
Age
30
Weight (lbs)
170
Height (Feet)
5
Height (Inches)
10
Activity Level
1.2
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Calorie Calculator (Mifflin-St Jeor) calculates Maintenance Calories, Weight Loss (-1lb/week), Weight Gain (+0.5lb/week) using Gender, Age, Weight (lbs), Height (Feet). Individual health metrics and medical costs vary. Use this for general wellness tracking and planning — consult your doctor or healthcare provider before making medical, diet, or fitness decisions based on calculator results.
Use this health calculator to compare scenarios before committing money, time, or a provider conversation.
The estimate combines Gender, Age, Weight (lbs) and returns Maintenance Calories, Weight Loss (-1lb/week), Weight Gain (+0.5lb/week).
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This calculator provides general estimates for informational purposes. It is not a substitute for professional medical advice, diagnosis, or treatment. Consult a healthcare provider before making health-related decisions.
No external sources are listed for this calculator. The estimates are computed from the documented formulas and the assumptions entered on this page.
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Reviewed by the CalculateThis.ai editorial team. Updates: check back for latest parameters. Tools are for estimation only — verify with current provider terms.