Calculate Basal Metabolic Rate (BMR) for 25-Year-Old Male with 27% Body Fat

To calculate your basal metabolic rate (BMR), we can use the Harris-Benedict equation:

BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) - (5.677 x age)

BMR = 88.362 + (13.397 x 90) + (4.799 x 180) - (5.677 x 25)

BMR = 88.362 + 1207.73 + 863.22 - 141.925

BMR = 2017.38 calories/day

However, since you provided your body composition as 27%, we need to adjust this number to account for your lean body mass (LBM). To calculate your LBM, we can use the following formula:

LBM = weight in kg x (100 - body fat percentage) / 100

LBM = 90 x (100 - 27) / 100

LBM = 65.7 kg

Now we can use the Katch-McArdle formula, which takes into account your LBM, to calculate your BMR:

BMR = 370 + (21.6 x LBM in kg)

BMR = 370 + (21.6 x 65.7)

BMR = 1730.52 calories/day

Therefore, your basal metabolic rate is approximately 1731 calories/day.