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TryCalc.net — Official Computation Report

Instrument: BMR (Mifflin-St Jeor) (Health & Fitness)

Verified Deterministic Computation & Analytical Audit
Generated: November 2, 2026https://trycalc.net/calculators/bmr● Verified Deterministic Logic
Input Parameters Summary:
Weight:

— kg

Height:

— cm

Age:

—

Gender:

—

BMR (Mifflin-St Jeor)

Health & Fitness
• 4 inputs • 100% Free
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CONSOLE READY

TRYCALC INSTRUMENTS · MODEL TC-674

❤️Health & Fitness
64-BIT PRECISION
kg
cm

TRYCALC COMPUTATION ENGINE

CALC
READY
64-BIT
STANDBY

READY

TC-674

Hardware calibrated. Enter variables on the left panel or click 'Fill Example' to execute.

Awaiting Calculation Parameters

Fill parameters in the control deck on the left or tap ⚡ Fill Example for instant precision telemetry.

BMR (Mifflin-St Jeor) · TryCalc Universal Engine

CALIBRATED · HIGH ACCURACY

Calculation Methodology & Direct Overview

The BMR (Mifflin-St Jeor) evaluates 4 key input variables (Weight, Height, Age, and more) using industry-standard deterministic algorithms. Fill parameters above to generate complete instant breakdowns, amortizations, and formatted exportable results.

Calculate your bmr (mifflin-st jeor) results instantly with this free online health tool. Enter weight, height, age, gender for a personalized health assessment used by fitness enthusiasts and healthcare screening.

✓ Verified Deterministic Formula
Domain Review: TryCalc Mathematics Team
Engine Status: Active 2026
1

Enter Parameters

Fill fields or use ⚡ Fill Example

2

Calculate

Deterministic formula engine

3

Instant Results

Breakdown, charts, copy & print

Quick Answer & Overview
Deterministic summary optimized for instant reference and search engine direct answers

Daily caloric expenditure combines Basal Metabolic Rate (BMR) and physical activity. Using the Mifflin-St Jeor formula, a 30-year-old male weighing 75 kg at 178 cm height has a resting BMR of ~1,718 calories, scaling to ~2,362 daily calories for moderate physical activity.

Formula & Calculation Methodology
Verified standard mathematical models and algorithmic implementation
Formula Representation

BMR = 10 · weight(kg) + 6.25 · height(cm) - 5 · age(y) + s

Mifflin-St Jeor equation determining basal metabolic rate (resting daily caloric expenditure).

Source & Reference: American Journal of Clinical Nutrition (Mifflin et al., 1990). Built for instant client-side execution with continuous unit test validation on TryCalc.
How to Use This Calculator
1

Open the BMR (Mifflin-St Jeor) — all inputs are clearly labeled with units.

2

Enter your weight (in kg) — step 1 of 3.

3

Enter your height (in cm) — step 2 of 3.

4

Enter your age — step 3 of 3.

5

Click the Calculate button — your result appears instantly on the right panel.

6

Adjust any input and recalculate as many times as you need — it's 100% free, no signup required.

Frequently Asked Questions

The BMR (Mifflin-St Jeor) evaluates your input parameters (Weight, Height, Age) using verified, standardized algorithms in health & fitness to deliver instantaneous, accurate telemetry.

Yes — TryCalc provides 100% free access to all 725+ calculators with unlimited runs, zero account registration requirements, and no paywalls.

Yes — the TryCalc workstation console is fully responsive, optimized for low-latency touch input across smartphones, tablets, and desktop workstations.

Daily Energy Expenditure & Caloric Target
Practical step-by-step numerical demonstration with real-world parameters

A 30-year-old active adult weighing 75 kg (165 lbs), height 175 cm, exercising moderately 4 days per week.

Baseline Inputs

Basal Metabolic Rate (BMR):

1,699 kcal / day

Physical Activity Level (PAL):

1.55 (Moderate Exercise)

Computed Benchmarks

Maintenance Calories (TDEE):

2,633 kcal / day

Target for Fat Loss (-500 kcal):

2,133 kcal / day

Target for Muscle Surplus (+300 kcal):

2,933 kcal / day

Takeaway & Analysis: A 500 kcal daily deficit yields an approximate body fat loss of 0.5 kg (1.1 lbs) per week safely without muscle catabolism.
Activity Level & Caloric Multiplier Guide
How physical activity level (PAL) scales resting basal metabolic rate into total daily energy expenditure (TDEE).
Activity ClassificationPAL MultiplierWeekly RoutineExample Daily Cal (at 1700 BMR)
Sedentary1.200Desk job, minimal purposeful exercise2,040 kcal / day
Lightly Active1.375Light exercise or sports 1–3 days/wk2,338 kcal / day
Moderately Active1.550Moderate exercise or sports 3–5 days/wk2,635 kcal / day
Very Active1.725Hard exercise or physical job 6–7 days/wk2,933 kcal / day
Extremely Active1.900Heavy physical labor or 2x daily training3,230 kcal / day
📌 Calculated via Mifflin-St Jeor basal metabolic rate standard.
Related Health & Fitness Calculators

Explore other free online tools in the same category

View All in Health & Fitness
BMI Calculator
Body Mass Index from weight and height.
TDEE
Total daily energy expenditure from BMR and activity level.
Body Fat (Navy)
Body fat percentage via US Navy circumference method.
Ideal Weight (Devine)
Ideal body weight via Devine formula.
TryCalc/Health & Fitness/BMR (Mifflin-St Jeor) Guide & Formula

How the BMR (Mifflin-St Jeor) Works: Formula, Methodology & Examples

Calculate your bmr (mifflin-st jeor) results instantly with this free online health tool. Enter weight, height, age, gender for a personalized health assessment used by fitness enthusiasts and healthcare screening.

Direct Answer & Methodological Summary

Daily caloric expenditure combines Basal Metabolic Rate (BMR) and physical activity. Using the Mifflin-St Jeor formula, a 30-year-old male weighing 75 kg at 178 cm height has a resting BMR of ~1,718 calories, scaling to ~2,362 daily calories for moderate physical activity.

Mathematical Formula & Equation Breakdown
BMR = 10 · weight(kg) + 6.25 · height(cm) - 5 · age(y) + s

Mifflin-St Jeor equation determining basal metabolic rate (resting daily caloric expenditure).

Formula Variables & Definitions:
s:+5 for biological males, -161 for biological females
TDEE:BMR × Physical Activity Factor (PAL)
Reference: American Journal of Clinical Nutrition (Mifflin et al., 1990)
Worked Numerical Example (Daily Energy Expenditure & Caloric Target)

Scenario: A 30-year-old active adult weighing 75 kg (165 lbs), height 175 cm, exercising moderately 4 days per week.

Sample Input Parameters:
Basal Metabolic Rate (BMR):1,699 kcal / day
Physical Activity Level (PAL):1.55 (Moderate Exercise)
Computed Outputs:
Maintenance Calories (TDEE):2,633 kcal / day
Target for Fat Loss (-500 kcal):2,133 kcal / day
Target for Muscle Surplus (+300 kcal):2,933 kcal / day

A 500 kcal daily deficit yields an approximate body fat loss of 0.5 kg (1.1 lbs) per week safely without muscle catabolism.

How to Use the BMR (Mifflin-St Jeor) (Step by Step)
1

Open the BMR (Mifflin-St Jeor) — all inputs are clearly labeled with units.

2

Enter your weight (in kg) — step 1 of 3.

3

Enter your height (in cm) — step 2 of 3.

4

Enter your age — step 3 of 3.

5

Click the Calculate button — your result appears instantly on the right panel.

6

Adjust any input and recalculate as many times as you need — it's 100% free, no signup required.

Frequently Asked Questions (FAQs)
How does the BMR (Mifflin-St Jeor) work?

The BMR (Mifflin-St Jeor) evaluates your input parameters (Weight, Height, Age) using verified, standardized algorithms in health & fitness to deliver instantaneous, accurate telemetry.

Is the BMR (Mifflin-St Jeor) completely free to use?

Yes — TryCalc provides 100% free access to all 725+ calculators with unlimited runs, zero account registration requirements, and no paywalls.

Can I use this calculator on mobile devices?

Yes — the TryCalc workstation console is fully responsive, optimized for low-latency touch input across smartphones, tablets, and desktop workstations.

✓ Editorial & Algorithmic Review: TryCalc Mathematics & Systems TeamLead Architect: Md. Mainul Islam Imon, B.Sc. CSE. Deterministic formulas verified against ISO, IEEE & industry specifications.
Deterministic Engine
Updated 2026