Last updated on November 13, 2022
How accurate are the adult height calculators? What’s the most accurate one?
Where I found a study, the calculators’ description gives the range of accuracy. Usually, the standard is to cover 90% or 95% of the population.
The mid-parent rule is accurate within 2.8 percent of the given height. The calculator gives you the predicted height and the possible range. Even then, it will be wrong 5% of the time.
The alternative mid-parent rule is accurate within 4 inches (10 centimeters).
The double infant height rule doesn’t give accuracy estimates.
The KGH doesn’t stage the accuracy but the range is built into the calculator.
The half-height prediction method is accurate to within 2 inches (5.5 cm) 95% of the time.