Ideal Weight Calculator
See the ideal body weight for your height from four classic formulas, alongside the healthy BMI range.
Quick answer
The Devine formula gives 50 kg (men) or 45.5 kg (women) plus 2.3 kg per inch over 5 ft — 73 kg (161 lb) for a 5 ft 10 in man. The healthy BMI range is a broader, more useful guide.
- Free
- No sign-up
- Fitness
- Updated October 2026
Ideal weight range (formulas)
155 lb – 165.3 lb
- Healthy BMI range (18.5–24.9)
- 128.9 lb – 173.5 lb
- Devine formula
- 160.9 lb
- Robinson formula
- 156.5 lb
- Miller formula
- 155 lb
- Hamwi formula
- 165.3 lb
Show the working
- Height 70 in = 10 in over 5 ft
- Devine: 50 + 2.3 × 10 = 73 kg
About the Ideal Weight calculator
Ideal body weight formulas were created for medical use — the Devine formula, for example, to dose medicines. They give a single number for a height, so the calculator shows the range across four formulas and the broader healthy-BMI range, which is a better everyday guide.
None of these account for frame size, muscle or age. Use them as a reference point, not a target you must hit.
How to use it
- Choose units and sex.
- Enter your height.
- Compare the formula range with the healthy BMI range.
The formula
Devine: 50 kg (men) or 45.5 kg (women) + 2.3 kg per inch over 5 ft
- Robinson: 52 / 49 kg + 1.9 / 1.7 kg per inch.
- Miller: 56.2 / 53.1 kg + 1.41 / 1.36 kg per inch.
- Hamwi: 48 / 45.5 kg + 2.7 / 2.2 kg per inch.
Worked example
Man, 5 ft 10 in
- 10 inches over 5 ft.
- Devine: 50 + 2.3 × 10 = 73 kg (161 lb).
- Healthy BMI range at this height: 58.5–78.7 kg.
Frequently asked questions
Which ideal weight formula is most accurate?
None is “accurate” for an individual; they disagree by several kilograms. The healthy BMI range is the most widely used guide.
Does it work for short heights?
The formulas are defined from 5 ft (152 cm) upward. Below that, use the healthy BMI range.
Should athletes use these numbers?
Not really. Muscular people often weigh more than these formulas suggest while being very lean; body fat percentage is a better measure.
Results are estimates for healthy adults, not medical advice. Talk to a doctor or registered dietitian before major changes to diet or training, especially if you are pregnant or have a health condition.
Popular tools
Image Converter
Convert any image to JPG, PNG or WebP, with quality and size controls.
Image
JPG to PNG Converter
Turn JPG files into PNG right in your browser — drag in one image or thirty.
Image
PNG to JPG Converter
Turn PNG files into JPG right in your browser — drag in one image or thirty.
Image
WebP to JPG Converter
Turn WebP files into JPG right in your browser — drag in one image or thirty.
Image