Quirkulator

Body Metric Calculators

14 calculators covering BMI and the other body composition indices, each with its formula and worked examples.

Body Metric Calculators brings together 14 calculators for BMI and the other body composition indices, including Adjusted Body Weight Calculator, BMI Prime Calculator, Body Surface Area Calculator and Ideal Body Weight Calculator.

Every page states its method up front — which formula, which convention, which assumptions — because those choices change the answer, and a calculator that hides them is only pretending to be precise.

All 14 pages compute in your browser: nothing you type is sent anywhere, and results update as you edit. Each one carries worked examples, interpretation bands where a score needs context, and a FAQ answering what people actually ask about that calculation.

The collection is part of Health & Fitness, and every page links to the neighbouring calculations you usually need next.

14 pages in this collection

Adjusted Body Weight CalculatorIBW plus 40 per cent of the excess — the dosing weight used when actual weight is far above ideal.BMI CalculatorBody mass index from height and weight, with the WHO category it falls in.BMI Prime CalculatorExpress BMI as a fraction of the upper healthy limit, where 1.00 is the cut-off.Body Fat From BMI CalculatorThe Deurenberg equation converts BMI, age and sex into an estimated fat percentage.Body Frame Size CalculatorSmall, medium or large frame from the height-to-wrist ratio used in dietetics.Body Surface Area CalculatorBody surface area in square metres from the Du Bois, Mosteller and Haycock equations.FFMI CalculatorFat-free mass index — muscularity scaled for height, with the height-adjusted variant.Healthy Weight Range CalculatorThe full weight span for your height, from the WHO BMI band and the Devine reference point.Ideal Body Weight CalculatorDevine, Robinson, Miller and Hamwi ideal weights side by side for your height.Lean Body Mass CalculatorBoer, Hume and James estimates of the non-fat portion of your body weight.Navy Body Fat CalculatorThe US Navy circumference method — body fat percentage from waist, neck, hip and height.Ponderal Index CalculatorMass divided by height cubed — a leanness index that scales better at extreme heights.Waist to Height Ratio CalculatorKeep your waist under half your height — the simplest central adiposity screen.Waist to Hip Ratio CalculatorWaist divided by hip circumference, the WHO measure of central fat distribution.

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