Ideal Body Weight Calculator
Use this free Ideal Body Weight Calculator to find your ideal body weight from your sex and height. It uses the well-known Devine formula and also shows the healthy BMI weight range for your height, so you get both a single target and a realistic range.
It is ideal for setting realistic weight goals, planning a diet or fitness programme, and understanding where your current weight sits against a healthy range for your height.
Table of Contents
What is an Ideal Body Weight Calculator?
An ideal body weight calculator estimates a healthy target weight from height and sex. The Devine formula, originally created for estimating drug dosages, is now the most quoted ideal-weight formula. It gives one target figure, while the healthy BMI range gives a band of weights considered healthy for the same height.
Devine formula: Men: IBW = 50 kg + 2.3 kg per inch above 5 ft. Women: IBW = 45.5 kg + 2.3 kg per inch above 5 ft. Healthy BMI weight range = 18.5 x height(m)^2 to 24.9 x height(m)^2.
How to Use the Ideal Body Weight Calculator (Step by Step)
- Select sex.
- Enter height in cm.
- Press Calculate for the Devine ideal weight plus the healthy BMI weight range.
Example Calculation
Male, 175 cm: Ideal body weight (Devine) is 70.46 kg, and the healthy BMI weight range is 56.66 kg to 76.26 kg.
Features
- Devine target plus the full BMI range together.
- Sex-specific calculation.
- Free and instant.
Benefits
- Realistic weight goals.
- A range instead of one harsh number.
- A diet planning start point.
Final Thoughts
For a sensible weight target, this Ideal Body Weight Calculator gives you both a Devine figure and a healthy range to aim for. For related tools, try the TDEE Calculator and the Lean Body Mass Calculator.
Frequently Asked Questions (FAQs)
What is the Devine formula used for?
It was created for estimating drug dosages and is now the most quoted ideal-weight formula; it gives a single target, while the BMI band gives a healthy range.
Why do Devine and BMI range differ?
Devine is a fixed line by height and sex, while BMI allows a range. Falling anywhere inside the BMI band is generally considered healthy.
Does frame size matter?
Yes – large-framed people may sit healthily near the top of the band and small-framed people near the bottom. The formulas do not measure body composition.
Is this suitable for children or athletes?
No. Children need growth-chart percentiles, and muscular athletes can exceed the BMI band while being lean.