Free Ideal Weight Calculator
Find your ideal weight range based on your height and gender. This calculator uses four scientific formulas (Devine, Robinson, Miller, Hamwi) and shows a consensus range.
Ideal Weight Calculator
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About the Ideal Weight Calculator
Ideal weight is not a single number but a healthy range. This calculator uses four established medical formulas — Devine, Robinson, Miller, and Hamwi — to give you a consensus healthy weight range based on your height and gender.
Quick Start Guide
- Enter your values — Fill in the fields with numbers relevant to your ideal weight calculation. Most fields include sensible defaults.
- Adjust settings — Change options like units, rates, or timeframes to match your specific scenario.
- Review results — The output shows a clear breakdown so you understand how the total was calculated.
How It Works
Devine (1974): Men: 50kg + 2.3kg per inch over 5ft. Women: 45.5kg + 2.3kg per inch over 5ft. Robinson (1983): Modified Devine with slightly lower weights. Miller (1983): Further refinement. Hamwi (1964): Men: 106lbs for 5ft + 6lbs per inch. Women: 100lbs for 5ft + 5lbs per inch.
Real-World Example
Scenario: A 5'6" (168 cm) woman
- Devine formula: 130 lbs (59 kg).
- Robinson formula: 127 lbs (58 kg).
- Miller formula: 125 lbs (57 kg).
- Hamwi formula: 130 lbs (59 kg).
Who Is This For?
This ideal weight calculator is designed for Health-conscious individuals tracking fitness goals, understanding body composition, and making informed wellness decisions.. It's intentionally simple — no complex signup forms, no data tracking, no distractions. Just enter your numbers and get the answer.
Pro Tip
Track your measurements over time rather than obsessing over single readings — trends are more meaningful than individual data points.
Things to Know
The ideal weight calculator provides instant, accurate results based on standard formulas and the values you enter. Whether you are planning a financial decision, tracking a health metric, or solving a practical problem, this tool gives you the numbers you need without requiring signup or account creation.
How to get the best results: Use accurate, up-to-date inputs for the most reliable calculations. When planning ahead, run multiple scenarios with different assumptions to understand the range of possible outcomes.
Note: This tool is designed for educational and planning purposes. For critical financial, medical, or legal decisions, always verify the results with a qualified professional who can evaluate your specific circumstances.
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Frequently Asked Questions
Which formula is most accurate?
No single formula is universally "most accurate" — they were developed using different populations and time periods. The Devine formula is most commonly used in clinical settings for medication dosing. The consensus range across all four formulas provides a more reliable target than any single formula.
Should I use this instead of seeing a doctor?
No. This tool provides educational estimates only. Always consult a healthcare professional for medical advice, diagnosis, or treatment.
How often should I use this tool?
Use it as often as you like. Tracking your results weekly or monthly can help you spot trends and monitor progress over time.
How accurate are the results?
Results are based on standard formulas and the values you enter. They are accurate for educational and planning purposes.
Is this tool really free?
Yes, completely free. No signup, no hidden charges, no usage limits. Use it as often as you need.
How to Use
Select your gender and enter your height in centimeters. The calculator shows your ideal weight according to four different medical formulas, plus a consensus range.
These formulas were developed for medical use to estimate ideal body weight for dosage calculations. They provide a general guideline, not an exact target.
Formulas Used
- Devine (1974): Male: 50 + 0.9 × (height - 152), Female: 45.5 + 0.9 × (height - 152)
- Robinson (1983): Male: 52 + 0.75 × (height - 152), Female: 49 + 0.67 × (height - 152)
- Miller (1983): Male: 56.2 + 0.56 × (height - 152), Female: 53.1 + 0.56 × (height - 152)
- Hamwi (1964): Male: 48 + 1.1 × (height - 152), Female: 45.5 + 0.9 × (height - 152)