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Ideal weight calculator

Find the healthy weight range for your height, derived from a body mass index between 18.5 and 24.9.

Required fields are marked with an asterisk (*).

Your height in the chosen unit.
Height unit
Choose between centimetres and metres.

"Ideal weight" is not a single number but a healthy range of weights that fits your height, derived from a body mass index between 18.5 and 24.9. This calculator works out the low bound, high bound and mid-range weight for your height, so you can set realistic healthy limits instead of an arbitrary target.

Formula

Low bound = height (m)² × 18.5, high bound = height (m)² × 24.9, and the mid-range is the average of the two.

When is this useful?

Use this calculator when setting a weight goal, to know the healthy range for your height and pick a realistic target within it instead of relying on an arbitrary number.

Worked example

Example using the calculator’s values: height 175 cm.
The healthy weight range is about 56.7 – 76.3 kg.
The mid-range weight is about 66.5 kg.

Assumptions

  • The range is derived from a body mass index between 18.5 and 24.9 only.
  • Ideal weight is a range, not a single number.
  • The frame varies with body structure and muscle mass.
  • Benchmarks are for adults and do not apply to children or pregnancy.
  • Results are indicative for general awareness.

Common mistakes

  • Treating the range as a target to hit its exact bounds.
  • Ignoring that BMI bands vary between populations.
  • Assuming the range applies to athletes with high muscle mass.
  • Using the calculator to set goals for children or pregnant women.

Frequently asked questions

Why a range instead of one number?

Because the healthy weight for your height spans many values, and a healthy body is not defined by a single precise number that ignores frame and composition.

Does the range apply to athletes?

The range is based on BMI, which does not distinguish muscle from fat, so an athlete may be misclassified outside the bounds.

Does it cover children and pregnant women?

No. The benchmarks are for adults, and children and pregnant women have their own ranges and assessments that need a professional.

Methodology and review

The calculator computes the low and high bounds by multiplying the square of height in metres by 18.5 and 24.9, then takes their average, converting height units automatically.

Results are for awareness only and do not constitute a diagnosis or medical advice. Consult a professional about any health concerns.

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