Calorie Calculator
The Calorie Calculator estimates your Total Daily Energy Expenditure (TDEE) — how many calories you need per day based on your body stats and activity level.
Educational estimate. Calculator results are for planning and information only, not financial, tax, medical, legal, or engineering advice. Verify important decisions with official sources or a qualified professional.
Calorie Calculator
Calculate Daily Calorie Needs (TDEE)
📐 Formula & Method
Mifflin-St Jeor BMR (Men)
Basal Metabolic Rate for men.
Mifflin-St Jeor BMR (Women)
Basal Metabolic Rate for women.
TDEE
Total Daily Energy Expenditure based on activity level.
📋 How to Use
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1
Select your gender.
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2
Enter your age, weight, and height.
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3
Select your daily activity level.
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4
Click "Calculate" to see daily calorie needs.
Understanding Calorie Needs
Your TDEE (Total Daily Energy Expenditure) is the total number of calories you burn per day. To lose weight, eat below your TDEE. To gain weight, eat above it. Maintenance calories equal your TDEE.
🔬 Methodology & Accuracy
Formula: Uses the standard mathematical formula shown in the Formula & Method section above. All computations run client-side in your browser — no data is sent to our servers.
Data sources: Tax bands, contribution limits and regulatory rates are taken from official US (IRS, SSA) and UK (HMRC, gov.uk) publications for the current tax year, and updated when bands change.
Last reviewed: June 2026 · Accuracy: Results are precise to two decimal places using IEEE-754 double-precision arithmetic. Intended for educational and planning use only.
For informational purposes only. Results are estimates based on the inputs and formulas provided. For financial, tax, medical, or legal decisions, consult a qualified professional. Rates and regulations change — always verify current figures with official sources.