# Adjusted Body Weight Calculator

URL: https://speedycalculator.com/calculators/health/adjusted-body-weight/
Last updated: 2026-10-25

> The adjusted body weight calculator combines ideal body weight (Devine) with actual weight for people whose weight is well above ideal. It is used in clinical nutrition and some dosing calculations.

## Inputs

- Sex
- Height (cm, m, mm, in, ft)
- Actual weight (kg, lb, g, oz, st)

## Results

- Ideal body weight
- Adjusted body weight
- Actual as % of ideal

## Formula

```
IBW (Devine) = 50 or 45.5 kg + 2.3 kg per inch over 5 ft
Adjusted BW = IBW + 0.4 × (actual − IBW)
```

## Explanation

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

FieldWhat to enterSexChoose one: Male, FemaleHeightUnits: cm, m, mm, in, ftActual weightUnits: 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.*

## 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 %.

## FAQ

**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.