Ideal Body Weight Calculator
Compare Devine, Robinson and Miller formulas.
Enter your values
Choose one of: Male, Female.
Enter the height in cm.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Devine formula
- 73.2 kg
- Robinson formula
- 71.1 kg
- Miller formula
- 70.4 kg
- Average of three
- 71.6 kg
Quick answer
Ideal body weight formulas estimate a reference weight from height, with results varying slightly by formula.
Devine: 50 + 2.3 kg per inch over 5 ft (men); 45.5 + 2.3 (women)
At a glance
| What it does | Compare Devine, Robinson and Miller formulas. |
|---|---|
| Category | Health |
| Inputs needed | Sex, Height |
| Main output | Devine formula |
| Formula | Devine: 50 + 2.3 kg per inch over 5 ft (men); 45.5 + 2.3 (women) |
| Cost | Free — no sign-up, no download |
How to use the Ideal Body Weight Calculator
- 1Enter sex and height.
- 2Each formula adds a fixed amount per inch over 5 feet to a base weight.
- 3These are population averages, not personalised targets — body composition and frame size matter too.
Inputs explained
- Sex
- Choose one of: Male, Female.
- Height(cm)
- Enter the height in cm.
Worked example
Using the values the calculator loads with:
Inputs
- SexMale
- Height178 cm
Results
- Devine formula73.2 kg
- Robinson formula71.1 kg
- Miller formula70.4 kg
- Average of three71.6 kg
Frequently asked questions
Which formula is best?
None is definitively best; clinicians often use Devine for drug dosing calculations.
Should I aim for this exact weight?
No — treat it as a reference range, not a strict goal.
What do I need to enter into the Ideal Body Weight Calculator?
Just 2 values: sex, height. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Ideal Body Weight Calculator work out the answer?
Ideal body weight formulas estimate a reference weight from height, with results varying slightly by formula. It applies the formula Devine: 50 + 2.3 kg per inch over 5 ft (men); 45.5 + 2.3 (women) and shows the working so you can check each step by hand.
Is the Ideal Body Weight Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.