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AiTechWorlds
AiTechWorlds
Calculate BMI and daily calorie needs (BMR/TDEE) based on height, weight, age and activity level.
BMI
24.5
Normal weight
Maintenance calories/day
2633
Target calories/day (maintain)
2633
Uses the Mifflin-St Jeor equation for BMR (basal metabolic rate) and standard activity multipliers for TDEE (total daily energy expenditure). A ±500 calorie/day adjustment approximates roughly 1 lb (0.45 kg) of weight change per week. This is a general estimate, not personalized medical advice.
100% in-browser — all math runs locally, no data leaves your device.
BMI & Calorie Needs Calculator computes Body Mass Index from height and weight, and daily calorie needs using the Mifflin-St Jeor BMR formula multiplied by an activity-level factor (TDEE), with adjusted targets for losing, maintaining or gaining weight.
Enter height, weight, age and sex
Used for BMI and the BMR formula.
Select an activity level
From sedentary to very active.
Pick a goal (lose/maintain/gain)
Applies a standard ±500 calorie adjustment.
100% Private — No Server Required
All processing happens directly in your browser. No data is uploaded, stored, or transmitted to any server.
Last reviewed on July 24, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.
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