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Use this BMR calculator to estimate your Basal Metabolic Rate and your Total Daily Energy Expenditure (TDEE). It helps show how many calories your body may need at rest and how those needs may change based on your activity level. This can be useful for general calorie planning, weight management and fitness awareness.
This tool uses a standard BMR equation based on age, gender, height and weight, then multiplies it by your selected activity factor.
Basal Metabolic Rate (BMR) is the estimated number of calories your body needs each day to maintain essential functions while at rest. These functions include breathing, circulation, temperature regulation and basic cell activity.
In simple terms, BMR is the energy your body uses even if you are not exercising. It does not include extra calories burned from walking, working, training or other daily movement.
Total Daily Energy Expenditure (TDEE) is an estimate of how many calories you may use in a full day after considering your activity level. While BMR is your baseline energy need, TDEE adds movement and exercise on top of that baseline.
This is why BMR and TDEE are often used together. BMR helps estimate resting needs, while TDEE helps estimate a more practical daily calorie target.
This tool is useful when you want a quick estimate for general calorie planning without doing the formula manually.
Suppose a 30-year-old woman weighs 65 kg, is 165 cm tall, and has a moderately active lifestyle.
Estimated BMR = (10 × 65) + (6.25 × 165) − (5 × 30) − 161 = 1,370 calories/day
Estimated TDEE = 1,370 × 1.55 ≈ 2,124 calories/day
This means her body may need about 1,370 calories/day at rest, and around 2,124 calories/day to maintain her current weight at that activity level.
This BMR calculator gives an estimate based on a standard formula. It is useful for general planning, but it does not account for all real-world factors. Actual calorie needs can change because of body composition, muscle mass, hormones, health conditions, medication, sleep, stress and lifestyle.
That means the result should be used as a starting point, not as a medical diagnosis or guaranteed calorie prescription. For personalized health or nutrition advice, consult a qualified healthcare or nutrition professional.
Disclaimer: This calculator is provided for informational and educational use only. It does not replace medical, nutritional or professional advice.