Ideal Body Weight Calculator

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Calculate your ideal body weight using four clinically-used formulas (Hamwi, Robinson, Miller, and Devine). These provide a healthy weight range to target — not a single perfect number.

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Enter Your Measurements

Results

Ideal Weight (Hamwi)

166

lbs

Ideal Weight (Robinson)

157

lbs

Healthy Weight Range Low

149

lbs

Healthy Weight Range High

183

lbs

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Formula

Hamwi Male: 106 lbs + 6 lbs/inch over 5ft; Female: 100 lbs + 5 lbs/inch over 5ft (±10% for frame)

How to Use This Calculator

How to Use

  1. 1

    Enter your height and select your sex.

  2. 2

    Select your frame size (measure wrist circumference if unsure: small <6.5", medium 6.5–7.5", large >7.5" for women).

  3. 3

    Use the range, not the exact number, as your target.

Frequently Asked Questions

Frequently Asked Questions

Are ideal weight formulas accurate?

These formulas were developed for clinical drug dosing, not aesthetic ideals. They represent a reasonable healthy weight but don't account for muscle mass. Athletes and muscular individuals may healthily exceed these ranges.
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In-Depth Guides

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About This Calculator

This calculator uses the formula: Hamwi Male: 106 lbs + 6 lbs/inch over 5ft; Female: 100 lbs + 5 lbs/inch over 5ft (±10% for frame). All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.

Built and maintained by the CalcSmart team. Last updated March 2026.

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