Ideal Weight Calculator
Calculate your ideal weight range based on height and gender using scientifically validated formulas (Robinson for men, Miller for women).
Your Measurements
Ideal Weight Range
Enter your details to calculate
Weight Breakdown
Height
170 cm
Gender
male
About This Calculator
What is Ideal Weight?
Ideal weight is a range of healthy body weight based on your height and gender. This calculator uses scientifically validated formulas (Robinson formula for men, Miller formula for women) to estimate a healthy weight range.
While ideal weight provides a useful guideline, it's important to remember that body composition (muscle vs. fat), bone density, and individual health factors also matter. A person with significant muscle mass may weigh more than the "ideal" range but still be healthy.
Key Points:
- Based on height and gender-specific formulas
- Healthy weight range: ±10% of ideal weight
- Consider body composition, not just weight
- Consult healthcare providers for personalized advice
Formula & Calculation Method
Ideal Weight Calculation Formulas
Robinson Formula (Men):
Ideal Weight = 52 kg + 1.9 × (Height in inches - 60)
Miller Formula (Women):
Ideal Weight = 53.1 kg + 1.36 × (Height in inches - 60)
Where:
- Height is measured in inches (convert from cm if needed: inches = cm ÷ 2.54)
- The formulas calculate ideal weight for heights over 5 feet (60 inches)
- Healthy weight range = Ideal weight ± 10%
- These formulas are more accurate than the older Devine formula
Example Calculation (Male, 175 cm):
Height: 175 cm = 68.9 inches
Height over 5 feet: 68.9 - 60 = 8.9 inches
Ideal Weight = 52 + (1.9 × 8.9) = 68.9 kg
Healthy Range: 62.0 - 75.8 kg (68.9 ± 10%)
How to Use This Calculator
How to Use the Ideal Weight Calculator
- Select Unit System: Choose between Metric (cm) or Imperial (inches) for height measurements.
- Select Gender: Choose your biological sex, as ideal weight formulas differ for males and females.
- Enter Your Height: Input your height in the selected unit system. The calculator supports both metric (cm) and imperial (inches) measurements.
- View Results: The calculator automatically displays your ideal weight and healthy weight range based on scientific formulas.
- Use as a Guideline: Remember that ideal weight is a reference point. Body composition, muscle mass, and individual health factors are equally important.
💡 Pro Tip:
Ideal weight is a guideline, not a strict rule. If you're muscular or athletic, you may weigh more than the "ideal" range and still be healthy. Focus on body composition, overall health, and how you feel rather than just the number on the scale. Consult with healthcare providers for personalized weight management advice.
Frequently Asked Questions
What's the difference between ideal weight and BMI?
Ideal weight provides a specific weight range based on height and gender, while BMI (Body Mass Index) is a ratio of weight to height squared that categorizes you into ranges (underweight, normal, overweight, obese). Both are screening tools, but neither accounts for muscle mass or body composition.
Why do men and women have different formulas?
Men and women have different body compositions - men typically have more muscle mass and bone density, while women have more body fat percentage (necessary for reproductive health). These biological differences require gender-specific formulas for accurate ideal weight estimation.
Is it bad if I'm outside the ideal weight range?
Not necessarily. The ideal weight range is a guideline. If you're slightly outside the range but have good muscle mass, healthy body fat percentage, and no health concerns, you may still be healthy. However, significantly outside the range may warrant consultation with healthcare providers.
Can athletes be heavier than ideal weight?
Yes! Athletes and very active individuals often weigh more than the 'ideal' range because muscle weighs more than fat. A person with high muscle mass can be healthy at weights above the ideal range. Body composition (muscle vs. fat) is more important than total weight.
Which formula is most accurate?
The Robinson (men) and Miller (women) formulas used in this calculator are considered more accurate than older formulas like Devine. However, all formulas are estimates. For precise assessment, consider body composition analysis, waist-to-hip ratio, and consultation with healthcare professionals.
Should I use ideal weight to set weight loss goals?
Ideal weight can be a useful reference point, but consider it as part of a broader health picture. Focus on sustainable habits, body composition improvement, and overall health rather than just reaching a specific weight number. Gradual progress toward the ideal range (if needed) is healthier than rapid weight loss.
Expert Reviewed
This calculator was reviewed by NumCalculators Editorial Team, Multi-disciplinary Expert Team