Calculator
Ideal Weight Calculator
Miller-formula ideal weight, body fat range, estimated life expectancy impact, fat energy reserve, and reference ranges for key wellness markers.
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Results
All outputs are educational estimates, not medical advice. Life expectancy figures use population averages and simplified weight adjustments. Fat reserve math assumes excess mass is mostly adipose tissue and uses a sedentary energy estimate. Consult a healthcare provider for personal guidance.
Frequently asked questions
What is the Miller formula for ideal weight?
The Miller formula (1983) estimates healthy weight from height and sex. For men: 56.2 kg + 1.41 kg per inch over 5 ft. For women: 53.1 kg + 1.36 kg per inch over 5 ft. It is one of several clinical estimates — not a personal target for every body type.
How accurate is the life expectancy estimate?
The life expectancy output uses simplified US population tables plus a rough penalty for weight above ideal. It describes population trends, not how long you will live. Genetics, fitness, smoking, and medical care matter far more.
Should I use BMI instead?
BMI is a different metric (weight ÷ height²). This calculator deliberately uses Miller ideal weight and body fat ranges because BMI alone misses muscle mass and frame size. Use results as one reference among several.
Ideal ranges — urine pH, saliva pH & body temperature
Target wellness values for DIY tracking. Individual goals depend on health status, medications, and measurement method.
Urine pH
First-morning or random samples vary with diet, hydration, and kidney function. Track trends rather than single readings.
Saliva pH
Saliva pH shifts with meals, oral health, breathing, and hydration. Resting samples taken away from food are most comparable.
Body temperature
Ideal varies by measurement site (oral, axillary, rectal), time of day, cycle, and activity. Patterns over time matter more than a single reading.