How to Calculate Basal Metabolic Rate Male

Male Basal Metabolic Rate (BMR) Calculator

Calculate your body's energy requirements at rest using the Mifflin-St Jeor Equation.

Your Estimated BMR

Calories per day (at complete rest)

How to Calculate Basal Metabolic Rate (BMR) for Men

Understanding your Basal Metabolic Rate (BMR) is the foundation of any successful nutrition or fitness plan. For men, BMR represents the number of calories the body burns just to perform life-sustaining functions such as breathing, blood circulation, and cell production while at rest.

The Mifflin-St Jeor Equation for Males

This calculator utilizes the Mifflin-St Jeor Equation, which is currently recognized as the most accurate standard for predicting metabolic rate in healthy adults. The formula specifically for males is:

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

Key Factors Affecting Male BMR

• Muscle Mass: Men typically have more lean muscle mass than women. Muscle tissue is metabolically active and requires more energy to maintain, leading to a higher BMR.
• Age: As men age, metabolic rate naturally declines due to the loss of lean muscle tissue and changes in hormonal balance.
• Height and Weight: Larger bodies have more metabolically active tissue and a larger surface area, requiring more energy for maintenance.

Practical Example

Let's look at a 40-year-old male who weighs 90 kg and is 185 cm tall:

1. (10 × 90) = 900
2. (6.25 × 185) = 1156.25
3. (5 × 40) = 200
4. BMR Calculation: 900 + 1156.25 – 200 + 5 = 1,861.25 Calories/day

BMR vs. TDEE

It is important to remember that BMR does not include physical activity. To find your Total Daily Energy Expenditure (TDEE), you must multiply your BMR by an activity factor (typically ranging from 1.2 for sedentary to 1.9 for extremely active). Knowing your BMR is the first step to determining whether you should eat in a surplus (for muscle gain) or a deficit (for fat loss).

function calculateMaleBMR() { var weight = parseFloat(document.getElementById('maleWeight').value); var height = parseFloat(document.getElementById('maleHeight').value); var age = parseFloat(document.getElementById('maleAge').value); var resultContainer = document.getElementById('bmrResultContainer'); var resultDisplay = document.getElementById('bmrValue'); if (isNaN(weight) || isNaN(height) || isNaN(age) || weight <= 0 || height <= 0 || age <= 0) { alert("Please enter valid positive numbers for weight, height, and age."); resultContainer.style.display = "none"; return; } // Mifflin-St Jeor Equation for Men: // BMR = (10 * weight) + (6.25 * height) – (5 * age) + 5 var bmr = (10 * weight) + (6.25 * height) – (5 * age) + 5; resultDisplay.innerHTML = Math.round(bmr).toLocaleString() + " kcal"; resultContainer.style.display = "block"; // Scroll to result resultContainer.scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }