Metabolic Rate and Daily Nutrient Tracking
Katch-McArdle BMR, calcium, iron, and vitamin D daily values, and protein per meal — five calculations for tracking metabolism and micronutrient targets.
Beyond basic calorie counting, these five calculations refine metabolic rate estimates and track specific micronutrient and macronutrient targets.
Katch-McArdle BMR: a lean-mass-based metabolic estimate
Unlike formulas based on total weight, Katch-McArdle uses lean body mass: BMR = 370 + 21.6 × lean mass(kg). An 80 kg person at 15% body fat has 68 kg of lean mass, giving a BMR of 370 + 21.6 × 68 ≈ 1,838.8 kcal/day — more personalized for people who know their body fat percentage, especially leaner or more muscular individuals.
Calcium, iron, and vitamin D daily values: quick label math
Each nutrient's %DV is its amount divided by its FDA reference value, times 100 — calcium's reference is 1,300 mg, iron's is 18 mg, and vitamin D's is 20 mcg. A food providing 260 mg of calcium covers 20% of the daily target; the same logic applies directly to iron and vitamin D labels.
Protein per meal: distributing a daily target evenly
Dividing a 150g daily protein target across 4 meals gives 37.5g per meal — research suggests spreading protein intake across the day may support muscle protein synthesis better than one large dose, though total daily intake still matters most.
Small numbers, real impact
Whether it's a more personalized BMR estimate or hitting specific micronutrient and protein targets, these five calculations turn broad dietary guidelines into a concrete daily number. Try the Katch-McArdle BMR calculator, calcium, iron, and vitamin D daily value calculators, and the protein per meal calculator.