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Calorie Calculator (Mifflin-St Jeor)

Calculate daily calorie needs using the Mifflin-St Jeor equation. The most accurate BMR formula for weight management planning.

Decision summary

Calorie Calculator (Mifflin-St Jeor) estimates Maintenance Calories, Weight Loss (-1lb/week), Weight Gain (+0.5lb/week), Chart from Gender, Age, Weight (lbs), Height (Feet), Height (Inches), Activity Level. Use it as a directional estimate, then verify current quotes, rates, rules, or professional advice before acting.

Get deeper options
Change these first: Gender, Age, Weight (lbs), Height (Feet).
Watch these outputs: Maintenance Calories, Weight Loss (-1lb/week), Weight Gain (+0.5lb/week).
Sanity check: compare at least two scenarios before using the estimate for a quote, purchase, or planning decision.
Calorie Calculator (Mifflin-St Jeor)
Logic Verified
Configure parametersUpdated: Feb 2026
Transparent inputs
Change assumptions live
Decision support
Estimate first, verify quotes
0 - 1
18 - 120
80 - 100000
4 - 100000
0 - 11
1.2 - 1.9

Maintenance Calories

0

Weight Loss (-1lb/week)

0

Weight Gain (+0.5lb/week)

0

Chart

0

Data

0

Value

0
Assumptions used
These are the live inputs behind the result. Change one at a time before acting on the estimate.

Gender

0

Age

30

Weight (lbs)

170

Height (Feet)

5

Height (Inches)

10

Activity Level

1.2

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Expert Analysis & Methodology

Calorie Calculator (Mifflin-St Jeor)

Weight management comes down to energy balance: Calories In vs. Calories Out. This tool determines your Total Daily Energy Expenditure (TDEE).

The Formula

We use the Mifflin-St Jeor Equation, widely considered the gold standard for clinical accuracy.

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Medical calculators are educational only. Use the result to prepare questions for qualified professionals.

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Disclaimer

This calculator is provided for educational and informational purposes only. It does not constitute professional legal, financial, medical, or engineering advice. While we strive for accuracy, results are estimates based on the inputs provided and should not be relied upon for making significant decisions. Please consult a qualified professional (lawyer, accountant, doctor, etc.) to verify your specific situation. CalculateThis.ai disclaims any liability for damages resulting from the use of this tool.