Healthy Weight Range Calculator Formula

Understand the math behind the healthy weight range calculator. Each variable explained with a worked example.

Use the Healthy Weight Range Calculator

Formulas Used

Minimum Healthy Weight

min_weight_lbs = 18.5 * height_m * height_m * 2.20462

Maximum Healthy Weight

max_weight_lbs = 24.9 * height_m * height_m * 2.20462

Min Weight (kg)

min_weight_kg = 18.5 * height_m * height_m

Max Weight (kg)

max_weight_kg = 24.9 * height_m * height_m

Variables

VariableDescriptionDefault
height_feetHeight (feet)(ft)5
height_inchesHeight (inches)(in)10
total_inchesDerived value= height_feet * 12 + height_inchescalculated
height_mDerived value= total_inches * 0.0254calculated

How It Works

Healthy Weight Range

Weight (kg) = BMI x Height(m)^2

A healthy BMI range is 18.5 to 24.9. By plugging in these BMI values, you get the healthy weight range for any given height.

  • Min weight = 18.5 x height(m)^2
  • Max weight = 24.9 x height(m)^2

    • Worked Example

    A person 5 feet 10 inches tall.

    height_feet = 5height_inches = 10
    1. 01Height = 70 inches = 1.778 m
    2. 02Min weight = 18.5 x 1.778^2 = 58.5 kg = 128.9 lbs
    3. 03Max weight = 24.9 x 1.778^2 = 78.7 kg = 173.5 lbs
    4. 04Healthy range: 129 - 174 lbs

    Frequently Asked Questions

    What is a healthy weight?

    A healthy weight corresponds to a BMI between 18.5 and 24.9. This range is associated with lower risk of chronic disease.

    Learn More

    Guide

    How to Calculate Your Ideal Weight: Formulas and Practical Guidance

    Learn how to calculate your ideal body weight using the Devine, Robinson, Miller, and Hamwi formulas. Understand what ideal weight really means and how to set realistic goals.

    Ready to run the numbers?

    Open Healthy Weight Range Calculator