The Calorie Calculator helps estimate how many calories you should consume daily. It also offers basic guidelines for healthy weight gain or weight loss.
Your Daily Calorie Needs
About Our Calorie Counter
This Calorie Calculator uses well-known scientific formulas to estimate daily calorie needs. It helps individuals understand how many calories they may need each day. The Harris-Benedict Equation (1918–1919) was one of the earliest methods. It calculates Basal Metabolic Rate (BMR)—the calories your body burns at rest to maintain functions like breathing, circulation, and cell production. In 1984, researchers updated the equation for better accuracy, and it remained widely used for decades.
In 1990, scientists introduced the Mifflin-St Jeor Equation. Like Harris-Benedict, it measures BMR, but research shows it provides more reliable results for modern populations. This improvement reflects changes in body composition and lifestyle over time. Today, most clinical and nutritional settings use the Mifflin-St Jeor Equation as the gold standard for estimating BMR.
To calculate total daily energy needs, you multiply your BMR by an Activity Factor. This determines your Total Daily Energy Expenditure (TDEE) and gives a realistic estimate of daily calorie burn. The result depends on lifestyle, ranging from sedentary (little or no exercise) to very active (hard exercise or physical job).
Check out our other free health and fitness calculators such as Basal Metabolic Calculator, BMI Calculator, Body Fat Calculator and Daily Steps to Ideal Weight Calculator.