Fat tissue holds less water and is less metabolically active than lean tissue, so clinicians often use an adjusted weight in obesity.
How to use the Adjusted Body Weight Calculator
- Sex
- Height
- Actual weight
Results update as you type, and every field accepts the units shown in its menu.
How it works
Ideal weight is found from height and sex, then 40% of the excess is added back.
Inputs explained
| Field | What to enter |
|---|---|
| Sex | Choose one: Male, Female |
| Height | Units: cm, m, mm, in, ft |
| Actual weight | Units: kg, lb, g, oz, st |
What each result means
- Adjusted body weight = [Ideal body weight] + 0.4×([Actual weight] – [Ideal body weight])
- Actual as % of ideal = [Actual weight] ÷ [Ideal body weight] × 100
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
IBW (Devine) = 50 or 45.5 kg + 2.3 kg per inch over 5 ftAdjusted BW = IBW + 0.4 × (actual − IBW)Worked example
Inputs — Sex: Male; Height: 170 cm; Actual weight: 110 kg.
Results — Ideal body weight = 65.9 kg; Adjusted body weight = 83.6 kg; Actual as % of ideal = 167 %.
Frequently asked questions
When is adjusted weight used?
Commonly when actual weight is more than 120–130% of ideal.
Why 0.4?
It is a widely used correction factor, though some protocols use 0.3–0.5.
What formula does the Adjusted Body Weight Calculator use?
IBW (Devine) = 50 or 45.5 kg + 2.3 kg per inch over 5 ft.