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03 // Bidirectional STEM Calculators // EVERYDAYBMR = 10m + 6.25h_cm - 5a + s

Basal Metabolic Rate (Mifflin-St Jeor BMR) Calculator

The Mifflin-St Jeor clinical equation estimates Basal Metabolic Rate (BMR)—daily resting energy expenditure in kcal/day—from body mass m (kg), height h (cm), age a (years), and physiological constant s (+5 male, -161 female).

BMR = 10m + 6.25h_cm - 5a + s
Pick which value you want to calculate (or type into any field):Solving for: BMR (kcal) — Basal Metabolic Rate (kcal/day)
Calculated

Resting daily caloric expenditure in kilocalories

6005,000.00
unit

Body weight in kilograms (switch unit to lb)

30250

Standing stature in cm (175 cm = 5 ft 9 in)

100230
unit

Chronological age in years

15100
unit

+5 for male reference profile, -161 for female reference profile

-1615
unit
Calculated Result · Basal Metabolic Rate (kcal/day) (BMR (kcal))
1,698.75

Step-by-Step Calculation

01Canonical Law: BMR = 10m + 6.25h_cm - 5a + s
02Given Inputs (Base Units): m = 75 kg, h (cm) = 175, a (yr) = 30, s = 5
03Solve for BMR (kcal) (Basal Metabolic Rate (kcal/day)): BMR (kcal) = 1,698.75

The Mifflin-St Jeor clinical equation estimates Basal Metabolic Rate (BMR)—daily resting energy expenditure in kcal/day—from body mass m (kg), height h (cm), age a (years), and physiological constant s (+5 male, -161 female).

Real-World Reference Values

Sedentary TDEE MultiplierTDEE = BMR × 1.20

Desk work with minimal structured exercise

Moderate Activity TDEE (3–5d/wk)TDEE = BMR × 1.55

Regular resistance or aerobic training

High-Output Athlete TDEETDEE = BMR × 1.725 – 1.90

Daily intense training sessions

20-Row Comparison Table

Basal Metabolic Rate (kcal/day) (BMR (kcal)) · Body Mass (m)

Basal Metabolic Rate (Mifflin-St Jeor BMR) Calculator — Body Mass → Basal Metabolic Rate (kcal/day)
#Body Mass (kg)Basal Metabolic Rate (kcal/day) (BMR (kcal))Δ %
0130 kg1,248.75 -26.49%
0235.4079 kg1,302.83 -23.31%
0340.8158 kg1,356.91 -20.12%
0446.2237 kg1,410.99 -16.94%
0551.6316 kg1,465.07 -13.76%
0657.0395 kg1,519.14 -10.57%
0762.4474 kg1,573.22 -7.39%
0867.8553 kg1,627.30 -4.21%
0975 kgCurrent1,698.75 0.00%
1078.6711 kg1,735.46 +2.16%
1184.0789 kg1,789.54 +5.34%
1289.4868 kg1,843.62 +8.53%
1394.8947 kg1,897.70 +11.71%
14100.3026 kg1,951.78 +14.89%
15105.7105 kg2,005.86 +18.08%
16111.1184 kg2,059.93 +21.26%
17116.5263 kg2,114.01 +24.45%
18121.9342 kg2,168.09 +27.63%
19127.3421 kg2,222.17 +30.81%
20132.75 kg2,276.25 +34.00%
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Frequently Asked Questions

Why is Mifflin-St Jeor preferred over the older Harris-Benedict formula?+

The Academy of Nutrition and Dietetics found Mifflin-St Jeor (1990) predicts measured indirect calorimetry resting expenditure within ±10% more accurately than Harris-Benedict (1919).

How do I switch between Male and Female profiles?+

Set the constant s to +5 for the male equation or -161 for the female equation.

How do I convert BMR into Total Daily Energy Expenditure (TDEE)?+

Multiply BMR by your activity factor (1.20 sedentary, 1.375 light, 1.55 moderate, 1.725 heavy).