Calorie Calculation

Q: Which formula does this calculator use?

It uses the Mifflin-St Jeor equation to estimate Basal Metabolic Rate (BMR), then multiplies by an activity factor to derive TDEE. This formula is considered the most accurate predictive equation for the general population by major dietetic associations.

Q: How accurate are the results?

The output is a science-based estimate, not an exact measurement. Individual metabolism, muscle mass, and genetics can cause variation. Track your actual weight for two to three weeks and adjust your intake by 100–200 kcal if progress stalls or changes too fast.

Q: What calorie deficit is safe for weight loss?

A daily deficit of 300–500 kcal below your TDEE is generally recommended, producing roughly 0.3–0.5 kg of fat loss per week while preserving energy levels and muscle tissue.

Q: Do I need an account to use this tool?

No. The calorie calculator on VSM is completely free and requires no registration. Enter your details, hit calculate, and your results are displayed on the spot.

Plan in detail to reach your weight goal scientifically

Cân Nặng Hiện Tại (kg)

Cân Nặng Mục Tiêu (kg)

Your TDEE (calories/day) Don't know? Calculate TDEE →

Goal Achievement Speed

Slow

0.25 kg/tuần

Moderate

0.5 kg/tuần

Fast

1 kg/tuần

Calorie Calculator for Your Daily Energy Needs

This calorie calculator computes how many calories your body needs each day using clinically recognized formulas that factor in your weight, height, age, sex, and physical activity level. Whether your goal is weight loss, muscle gain, or maintaining your current physique, you get a personalized target in seconds.

Benefits of the calorie calculator

Calculates your TDEE (Total Daily Energy Expenditure) using the widely trusted Mifflin-St Jeor equation recommended by nutrition scientists.
Delivers goal-specific calorie targets for fat loss, lean bulking, or weight maintenance without guesswork.
Accounts for five activity levels — from sedentary desk work to intense daily training — for a realistic estimate.
Results appear instantly with no sign-up, no app install, and no personal data stored.
Supports both metric (kg/cm) and imperial (lb/in) units for convenience worldwide.

Use cases for the calorie calculator

People on a weight-loss journey who want a clear daily calorie ceiling before planning their meals.
Gym-goers and athletes aiming to build muscle who need to know their caloric surplus target.
Beginners starting a diet or nutrition tracking app and need an accurate baseline calorie number.
Dietitians and personal trainers who want a quick reference tool to share with clients during consultations.
Pregnant or breastfeeding women adjusting their energy intake to meet additional nutritional demands.

How to use the calorie calculator

Select your biological sex and enter your age, height, and current weight in your preferred unit system.
Choose the activity level that best describes your typical week — be honest for a more accurate result.
Pick your goal: lose weight, maintain, or gain weight.
Click Calculate to instantly see your recommended daily calorie intake alongside a macronutrient breakdown guide.

Frequently asked questions

Which formula does this calculator use? It uses the Mifflin-St Jeor equation to estimate Basal Metabolic Rate (BMR), then multiplies by an activity factor to derive TDEE. This formula is considered the most accurate predictive equation for the general population by major dietetic associations.

How accurate are the results? The output is a science-based estimate, not an exact measurement. Individual metabolism, muscle mass, and genetics can cause variation. Track your actual weight for two to three weeks and adjust your intake by 100–200 kcal if progress stalls or changes too fast.

What calorie deficit is safe for weight loss? A daily deficit of 300–500 kcal below your TDEE is generally recommended, producing roughly 0.3–0.5 kg of fat loss per week while preserving energy levels and muscle tissue.

Do I need an account to use this tool? No. The calorie calculator on VSM is completely free and requires no registration. Enter your details, hit calculate, and your results are displayed on the spot.