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

    Ready to run the numbers?

    Open Healthy Weight Range Calculator