BMR Calculator
Estimate basal metabolic rate using Mifflin–St Jeor for planning energy needs.
Use the calculator below, then review the formula, a numeric example, and the reference table to understand how the bmr calculator result is produced.
Educational tool only. It does not replace advice from a licensed clinician, dietitian, or exercise physiologist.
Calculator inputs
Result
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What is this calculator?
This guide supports the BMR Calculator, a focused resource for people researching bmr calculator results and related core metrics. The on-page tool keeps inputs simple while the sections below explain the math, a worked example, and reference ranges where they exist. Zig-zag calorie models are adherence tools: weekly averages matter more than perfection on any single day. QTc education highlights why automated ECG readings still undergo cardiologist review in practice. Pair anthropometric screens with simple behavioral anchors: steps, protein adequacy, sleep regularity, and strength training frequency. Weight-gain plans for muscle benefit from structured resistance training and protein spread across meals. Cholesterol ratios contextualize labs but do not capture LDL particle behavior or triglyceride nuances alone. Athletes with higher lean mass may look “overweight” on height–weight indices while remaining metabolically healthy; context always matters. MET values are population averages; wearable devices may disagree, which is acceptable if you use one method consistently. Diabetes risk checklists prompt screening; they are not validated predictive scores for every population. Older adults may prioritize functional metrics—grip strength, gait speed, and waist circumference—alongside classic BMI-style numbers. VO2 and heart-rate reserve estimates help beginners choose moderate intensity before progressing to structured intervals. Ponderal index sometimes appears in neonatal contexts; always confirm the intended age group for any index. Pediatric and adolescent interpretation almost always requires growth charts; a raw index value without age and sex context is incomplete. When BMR Calculator outputs conflict with how you feel, prioritize clinician review over any website summary.
How it works
Mifflin–St Jeor: Men BMR = 10×weight(kg) + 6.25×height(cm) − 5×age(y) + 5. Women: same with −161 instead of +5.
Example
Woman, 30 y, 165 cm, 62 kg → BMR ≈ 10×62 + 6.25×165 − 5×30 − 161 = 620 + 1031.25 − 150 − 161 ≈ 1340 kcal/day.
Reference Table
| Value | Meaning |
|---|---|
| BMR | Estimated calories at complete rest |
| Next step | Multiply BMR by activity (PAL) for TDEE |
| Individual variance | Muscle, hormones, and meds shift real BMR |
FAQ
- BMR vs RMR?
- Which equation is this?
- Why is my wearable different?
- Can I eat below BMR?