Enter the child’s current height and the % of adult height attained (typically looked up from the Bayley–Pinneau tables using clinician-determined bone age, sex, and maturation tempo) into the calculator to estimate predicted adult height.

Bone Age Height Calculator

Enter values, choose a tab, then click Calculate.

Bone Age Predictor
Parents Only
Height Converter
Bone age prediction uses skeletal maturity percentages and is an estimate, not a diagnosis.
The parents-only method estimates mid-parental target height with a typical range.
If both metric and US values are entered, the metric value is converted.

Related Calculators

Bone Age Height Formula

The following formula is used to estimate predicted adult height (PAH) using the Bayley–Pinneau approach once you have the child’s current height and the % of adult height attained from the BP tables.

PAH = C ÷ (PM / 100)

Variables:

  • PAH is the predicted adult height
  • C is the current height
  • PM is the percent of adult height attained (from Bayley–Pinneau tables)

What is a Bone Age Height?

In clinical practice, bone age is an estimate of skeletal maturity determined from an X-ray of the hand and wrist by comparing bone development to reference standards (such as the Greulich–Pyle atlas or Tanner–Whitehouse methods). A bone age–based height estimate commonly refers to a predicted adult height derived by combining the child’s current height with a bone-age-specific percentage from the Bayley–Pinneau tables. Clinicians use this as an estimate (not a guarantee) when evaluating growth patterns.

How to Calculate Bone Age Height?

The following steps outline how to estimate predicted adult height using bone age (Bayley–Pinneau):

  1. Have the child’s bone age assessed from a clinician-ordered hand/wrist X-ray and interpreted by a qualified professional (e.g., radiology/pediatric endocrinology).
  2. Using bone age, sex, and maturation tempo (late/average/early), look up PM = % of adult height attained in the Bayley–Pinneau tables.
  3. Measure the child’s current height (C) in any unit (cm, m, in, or ft).
  4. Compute predicted adult height: PAH = C ÷ (PM/100) (equivalently, PAH = C × 100 ÷ PM).
  5. Report the result in the desired unit (and remember this is an estimate that depends on the appropriateness of the table/category used).

Example Problem:

Use the following variables as an example problem:

Current Height (C) = 140 cm

% of Adult Height Attained (PM) = 88

Predicted Adult Height (PAH) = 140 ÷ (88/100) = 140 × 100 ÷ 88 = 159.09 cm (≈ 159.1 cm)