Calorie Calculator
Calorie Calculator
Estimated BMR
1,649 kcal/day
Estimated daily calories
2,556 kcal/day
Activity multiplier
1.55
How calculations work
This calculator estimates daily calorie needs using the Mifflin–St Jeor equation for basal metabolic rate (BMR), then multiplies BMR by an activity factor to produce a daily-calorie estimate. Inputs are weight, height, age, sex, and a standard activity multiplier. All math runs locally in your browser; no external services are used.
How to interpret results
The displayed values are estimates only. The BMR value reflects resting energy needs, while the estimated daily calories include routine activity based on the selected multiplier. Use these numbers as general references for planning meals or budgets—not as medical or dietary advice.
Disclaimer
What this calculator does
Estimates daily calorie needs by combining a resting metabolic rate (Mifflin–St Jeor) with an activity multiplier to approximate total daily energy expenditure (TDEE).
Who should use this calculator
Anyone planning diets, weight goals, or exercise programs who needs a quick estimate of daily calorie needs. It is useful for nutrition planning but not a substitute for personalised dietetic assessment.
How this calculator works
We compute BMR with the Mifflin–St Jeor formula from age, sex, height, and weight, then multiply by an activity factor (sedentary, lightly active, moderately active, etc.) to estimate daily calorie needs. All calculations happen client-side.
How to interpret your result
The TDEE estimate represents average daily calories for weight maintenance at the chosen activity level. To lose or gain weight adjust daily intake by a safe deficit or surplus (commonly 10–20%) and consult a professional for personalised plans.
Example
For example, a 30-year-old woman, 65 kg, moderately active, may have a TDEE near 2,200 kcal/day. Use your inputs for an accurate personalised estimate.
Limitations & disclaimer
Results are approximate and do not replace medical, nutritional, or metabolic testing. Factors like body composition and health conditions alter energy needs. Consult a registered dietitian for individualised advice.