Ideal Weight Calculator
Use our free Ideal Weight Calculator to estimate a healthy target weight using four trusted formulas: Devine, Robinson, Miller, and Hamwi. These height-based equations provide evidence-based ranges for men and women and are a helpful starting point alongside tools like BMI and body fat percentage.
How Ideal Weight Formulas Work
Each ideal weight formula starts with a base number at 5 feet of height and adds or subtracts weight depending on additional inches. These formulas don’t consider muscle mass or body composition, but they provide a medically recognized target range to compare against.
Ideal Weight Formulas Used in This Calculator
- Devine: Commonly used for medical dosing and clinical calculations.
- Robinson: Offers slightly lower estimates compared to Devine.
- Miller: Falls between Robinson and Hamwi depending on height.
- Hamwi: A classic quick-estimate rule often used in older medical references.
Instead of focusing on a single “perfect” number, most people use the range across these formulas as a target zone. Factors like muscle mass, lifestyle, and fitness goals all influence what weight feels healthiest for your body.
Compare With Other Health Tools
For a more complete picture of your health, try these related calculators:
- BMI Calculator – Check your weight category based on height and weight.
- Body Fat Percentage Estimator – Learn your body composition beyond weight alone.
- BMR Calculator – Estimate how many calories your body burns at rest.
- Target Heart Rate Calculator – Find the best workout zone for fat loss or fitness.
Your ideal weight is best viewed as a flexible range — not a strict target. Use these numbers as guidance, and combine them with healthy lifestyle habits and personal comfort to find your best weight zone.
Frequently Asked Questions
- How is ideal weight calculated?
- We use multiple established formulas including Devine, Robinson, Miller, and Hamwi, which estimate ideal body weight based on your height and gender. Each formula gives slightly different results, so we show a range.
- Is there one 'correct' ideal weight?
- No. Ideal weight varies based on factors like muscle mass, bone density, body composition, and overall health. The formulas provide a general guideline, not an absolute target. Consult your doctor for personalized advice.
- Why do different formulas give different results?
- Each formula was developed using different populations and methodologies. Showing multiple formulas gives you a more complete picture and a reasonable range to aim for rather than a single number.
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