Evidence-Based Goal Setting

Free Ideal Weight CalculatorRobinson · Miller · Devine · Hamwi

100% Free. Use four medical formulas to estimate your ideal weight based on height, gender, and frame. Compare averages and align your goals with evidence-based healthy ranges.

✓ Robinson, Miller, Devine, Hamwi
✓ Height-based ideal weight
✓ Gender-specific results

After this result, continue with BMI, Body Fat, BMR, or another tool above.

Measurement units

Ideal Weight

Compare Robinson, Miller, Devine, and Hamwi formulas for your height.

cm

≈ 5' 10"

Ideal weight predictions are starting points. Combine them with clinical advice and body composition data for personalized goal setting.

Why use this calculator

Practical guidance designed to work alongside your BMI results

Compare Four Medical Formulas

View Robinson, Miller, Devine, and Hamwi calculations side-by-side. The calculator also displays the overall average so you can anchor goals to realistic, research-informed targets.

Plan Healthy Weight Ranges

Use ideal weight estimates to set maintenance zones and milestones. The tool pairs perfectly with our BMI, BMR, and macro calculators to build a full evidence-backed plan for your body type.

Metric and Imperial Friendly

Switch between centimeters or feet and inches with a single tap. The calculator automatically converts height values so you can work with units your healthcare provider prefers.

How to get accurate results

Follow these steps so your numbers are useful, not just interesting

When to Use an Ideal Weight Calculator

Ideal weight formulas were created for clinicians to estimate healthy ranges quickly. They are most helpful for evaluating long-term trends, planning weight class goals, or guiding conversations with your doctor.

  • Robinson and Miller formulas emphasize modern research and produce moderate targets.
  • Devine and Hamwi formulas come from clinical dosing and may trend slightly lower for shorter individuals.
  • Use the average value as a balanced benchmark before considering body composition adjustments.
  • Pair the results with waist measurements, body fat percentage, and performance metrics.

Setting Realistic Weight Targets

Ideal weight is a range, not a single number. Focus on sustainable progress, energy levels, and strength gains instead of chasing a perfect figure on the scale.

  • Adjust expectations for age, muscle mass, bone density, and hormonal status.
  • Plan for gradual weekly changes—0.25 to 0.5 kg (0.5 to 1 lb) is sustainable for most adults.
  • Reassess every few months and align with nutrition or training blocks.
  • Celebrate non-scale victories such as improved mobility, sleep quality, and metabolic health.
Goal-weight guide

Ideal body weight formulas—and how to use them wisely

Ideal weight calculators estimate a height-based target using classic clinical formulas (Robinson, Miller, Devine, Hamwi). They are useful orientation points for goal setting, not a single “correct” body weight for every person.

Sample ideal-weight outputs

Approximate averages across the four formulas

Example A · Woman

  • Height 165 cm
  • Female

~57–59 kg

Formula average

Example B · Man

  • Height 178 cm
  • Male

~70–73 kg

Formula average

Example C · Man

  • Height 6′0″
  • Male

~76–80 kg

Formula average

Examples are rounded for readability. Use the calculator above for your exact inputs.

Robinson, Miller, Devine, and Hamwi at a glance

Each formula starts from a base weight at a reference height, then adds weight per inch (or centimeter equivalent) above that height. They were developed in different eras for different clinical uses—so they rarely agree exactly.

Showing all four plus an average gives a realistic band instead of a false sense of precision from one equation.

  • Devine: widely used historically in clinical dosing contexts
  • Robinson & Miller: later refinements of height–weight relationships
  • Hamwi: another classic bedside estimate still referenced in practice

Why “ideal weight” is a range, not a verdict

Muscle mass, bone structure, age, and fat distribution all change what a healthy weight looks like. A strength athlete can be heavier than formula averages and still metabolically healthy; someone lighter can still carry excess visceral fat.

Treat formula output as a conversation starter. Confirm goals with BMI category, waist measures, labs, and how you feel day to day.

Setting a smarter weight goal

Pick a target inside or near the formula average that also sits in a healthy BMI band for your height. Then break the gap into 5–10% body-weight milestones.

  • Prefer slow loss or gain (about 0.25–0.75% of body weight per week)
  • Revisit the target after major training or body-composition changes
  • Use waist-to-hip and body-fat tools if the scale and formulas disagree

Important limitations

These formulas do not account for frame size well, were not built for children, and can be misleading in pregnancy, sarcopenia, or edema. They should never override clinical judgment for malnutrition risk or obesity treatment.

About this calculator

This free ideal weight calculator compares Robinson, Miller, Devine, and Hamwi estimates in your browser. Results are educational guidelines for adults—not a prescription or diagnosis.

Official references for this calculator

Primary public and peer-reviewed sources that inform the formulas, category bands, or screening cutoffs used here.

  1. 1World Health Organization (WHO)
    Obesity and overweight (fact sheet)

    Adult overweight ≥25 BMI and obesity ≥30 BMI; explains BMI as a population screening marker.

    https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight

  2. 2U.S. Centers for Disease Control and Prevention (CDC)
    About body mass index (BMI)

    How CDC frames BMI screening and limitations.

    https://www.cdc.gov/bmi/about/index.html

Educational use only. Category labels on this site summarize public guidance and may not capture every local clinical pathway. Always follow advice from your clinician or national health service.

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Waist-to-Hip Calculator

WHO risk categories for fat distribution.

Macro Calculator

Protein, carb, and fat targets by goal.

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Frequently Asked Questions

Straight answers about accuracy, timing, and how to use your results

Each formula was created for a different clinical purpose, so no single equation fits everyone. Robinson and Miller often align with modern body composition averages, while Devine and Hamwi are still used for medication dosing. Compare all four and monitor how you feel at each target weight.