RediCalc.com
Last updated: June 1, 2026

Ideal Weight Calculator

Find your ideal body weight based on height and gender using four proven medical formulas. Results show a healthy weight range so you can set realistic fitness goals.

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Ideal Weight Results

Average Ideal Weight159.4lbs
Healthy Range143.5 - 175.4lbs
Devine Formula160.9lbs
Robinson Formula156.5lbs
Miller Formula155.0lbs
Hamwi Formula165.3lbs
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Understanding the Ideal Weight Calculator

An ideal weight calculator estimates a healthy target weight range for your height using established formulas. It offers a useful reference point, though “ideal” varies from person to person depending on build, muscle mass, and individual health.

Where the formulas come from

Classic equations like Devine, Robinson, and Hamwi were originally developed for medical dosing and give slightly different numbers, which is why a range is more honest than a single figure. They are based on height and sex and do not account for frame size or muscularity, so treat the result as a ballpark rather than a precise goal.

Ideal is individual

A healthy weight is better thought of as a range in which you feel strong, energetic, and well — not a magic number. A muscular person may sit above their “ideal” weight while being very lean and healthy. Use this estimate alongside how you feel, your fitness, and guidance from a healthcare provider.

Tips & things to know

  • Different formulas give different numbers — expect a range.
  • Frame size and muscle mass are not captured by these equations.
  • Focus on health and fitness, not just hitting an exact weight.

How the Ideal Weight Calculator Works

Four well-established formulas are used and averaged:

Devine (1974): Male: 50 + 2.3 × (inches over 5') kg

Robinson (1983): Male: 52 + 1.9 × (inches over 5') kg

Miller (1983): Male: 56.2 + 1.41 × (inches over 5') kg

Hamwi (1964): Male: 48 + 2.7 × (inches over 5') kg

Sources

  • Devine, B.J. "Gentamicin therapy" (1974).
  • Robinson, J.D. et al. (1983).
  • Miller, D.R. et al. (1983).

How to Use the Ideal Weight Calculator

1

Open the Ideal Weight Calculator

Navigate to the Ideal Weight Calculator page on Redicalc. The calculator loads instantly with no sign-up required.

2

Enter your values

Fill in body measurements such as age, weight, height, and gender. Toggle between metric and imperial units if available.

3

Review your results

Your ideal weight results appear instantly as you type. Review the breakdown, charts, or detailed analysis provided.

4

Adjust and compare

Try different input values to compare scenarios. This helps you understand how changes affect the outcome.

5

Share or save your results

Use the copy or share buttons to save your results. You can also bookmark the page for quick access later.

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Frequently Asked Questions

How accurate are ideal weight formulas?

These formulas provide a general guideline. They do not account for muscle mass, bone density, or body composition. Use alongside BMI and body fat measurements.

Why do the formulas give different results?

Each formula was developed from different population studies and uses different mathematical models. The average of all four provides the best estimate.

Is ideal weight the same as healthy weight?

Not exactly. Ideal weight is a statistical estimate. A healthy weight varies by individual based on muscle mass, frame size, and overall health markers.

Should I use this for weight loss goals?

Use it as a reference point, not an absolute target. Consult a healthcare provider for personalized weight management advice.

Does body frame size matter?

Yes. People with larger frames may weigh more at the same height. These formulas assume a medium frame. Adjust ±10% for small or large frames.