Calorie Calculator
Estimate daily calorie needs.
Knowing your estimated daily calorie needs helps with meal planning, weight management, and fitness goals. Utilitoo's Calorie Calculator uses the Mifflin-St Jeor equation - widely regarded as one of the most accurate BMR formulas - combined with activity level multipliers to estimate total daily energy expenditure.
Fitness enthusiasts setting macro targets, nutrition coaches onboarding clients, and individuals starting a diet plan all begin with a calorie baseline. The calculator accepts age, weight, height, gender, and activity level to produce both BMR and daily calorie estimates.
Enter your details in metric units (kg and cm), select your activity level, and click Calculate. Results show basal metabolic rate and estimated daily calories. Pair with BMI Calculator for body composition context.
All calculations run locally in your browser on Utilitoo. Your health data is never uploaded. Free for informational purposes only - not medical advice. Consult a healthcare professional for personalized nutrition guidance.
Calorie Calculator estimates BMR and daily calories from Mifflin-St Jeor plus an activity factor. It is a starting point for nutrition conversations, not a prescription.
Common use cases
- Estimating maintenance calories with Mifflin-St Jeor before meal planning.
- Coaches sketching client baselines during onboarding conversations.
- Comparing activity-level multipliers for sedentary vs active days.
- Educational demos of BMR vs total daily energy expenditure.
- Pairing with BMI Calculator for broader health-metric context.
Tips & common mistakes
Estimates are not medical advice - individual needs vary. Metric inputs (kg, cm) must be accurate. Athletes and some medical conditions need professional guidance beyond any online formula. Revisit activity level when your training block changes. Pregnancy, illness, and some medications need clinician guidance beyond Mifflin-St Jeor. BMI Calculator adds context but still is not a complete health assessment.
Common errors
- Entering pounds into a kilogram field.
- Choosing an activity level that does not match real weekly training.
How to use
- Enter age, weight, height, activity.
- View calorie estimate.
Frequently Asked Questions
What formula does the calorie calculator use?▼
The Mifflin-St Jeor equation for BMR, multiplied by an activity factor for total daily calories.
What activity levels are available?▼
Sedentary, light, moderate, active, and very active options adjust the calorie multiplier.
Metric or imperial units?▼
Enter weight in kilograms and height in centimeters.
Is this for weight loss or gain?▼
The result is maintenance calories. Eat below for loss or above for gain, under professional guidance.
Is my health data stored?▼
No. Age, weight, and activity inputs stay on your device. Calorie estimates are not health records on a server.
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