How does the Calorie Calculator work?

The calorie calculator uses the Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR) based on your gender, age, height, and weight. It then multiplies this value by an activity multiplier (TDEE) to determine your total daily energy expenditure.

TDEE stands for Total Daily Energy Expenditure. It represents the total number of calories you burn per day, including physical activity and basic metabolism.

Calorie Calculator – Daily BMR, TDEE & Macro Calculator | SipBite

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Accurate Calorie & Macro Calculator

Estimate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) to customize your nutrition plan.

Your Stats

Provide your physiological details to calculate baseline metabolic stats.

Biological Gender

Male

Female

Age 25

Height 175 cm

Weight 70 kg

Daily Activity Level

Your Fitness Goal

Lose Weight

Maintain

Build Muscle

Target Daily Nutrition

Target Calories / Day

Protein (g)

Fat (g)

Carbs (g)

*Calculated values are estimates based on standard clinical math formulas and nutritional recommendations. Consult with an RD or healthcare provider.

How does the Mifflin-St Jeor Equation work?

The Mifflin-St Jeor formula is widely recognized as the most accurate clinical method for estimating human Basal Metabolic Rate (BMR) in healthy adults. BMR represents the number of calories your body burns in a rested, fasting state just to keep basic systems (breathing, brain activity, core temp) functioning.

        Men: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) + 5 

        Women: BMR = (10 × weight in kg) + (6.25 × height in cm) – (5 × age in years) – 161

Once the BMR is calculated, it is multiplied by physical activity multipliers to estimate your Total Daily Energy Expenditure (TDEE). To achieve weight loss, we apply a safe, sustainable deficit of 500 kcal per day (promoting roughly 1 lb of fat loss per week) while adjusting protein intake higher to prevent muscle catabolism.