Calculator Comparison

Adult Height Predictor for Children vs Toddler BMI Calculator

Not sure which calculator to use? Here's a side-by-side comparison of the Adult Height Predictor for Children and Toddler BMI Calculator to help you pick the right one for your needs.

Adult Height Predictor for Children

Pregnancy & Baby

Predict your child's future adult height using the mid-parental height method combined with current growth data. Based on parental heights, child's age, and current height.

What you enter

Child's Current Height
Child's Age
Child's Gender
Father's Height
Mother's Height

What you get

Predicted Adult Height(primary)
In Feet & Inches
Mid-Parental Prediction
% of Adult Height Reached

Includes visual bar chart breakdown

Use Adult Height Predictor for Children

Toddler BMI Calculator

Pregnancy & Baby

Calculate your toddler's BMI value from weight and height. This tool does not assign a percentile or weight category: children's BMI is interpreted on age- and sex-specific CDC growth charts, which requires a pediatrician.

What you enter

Child's Weight
Child's Height
Child's Age

What you get

BMI(primary)

Use Toddler BMI Calculator

Key Differences

Feature	Adult Height Predictor for Children	Toddler BMI Calculator
Category	Pregnancy & Baby	Pregnancy & Baby
Inputs	5 required fields	3 required fields
Outputs	4 results	1 results
Chart	bar chart	No chart
FAQs	3 answered	3 answered

Input Comparison

Shared Inputs

Child's Age

Only in Adult Height Predictor for Children

Child's Current Height
Child's Gender
Father's Height
Mother's Height

Only in Toddler BMI Calculator

Child's Weight
Child's Height

Which Calculator Should You Use?

Use the Adult Height Predictor for Children if you need to:

Calculate predicted adult height
When you know your child's current height and child's age
Want a visual bar chart breakdown

Use the Toddler BMI Calculator if you need to:

Calculate bmi
When you know your child's weight and child's height

Frequently Asked Questions

How accurate are child height predictors?

Mid-parental height predictions are accurate within 2-4 inches for most children. The method works best for children age 2+ and is more accurate at older ages. Genetics account for 60-80% of height, with nutrition, health, and environment affecting the rest.

What is the mid-parental height method?

For boys: add 5 inches to mother's height, average with father's height. For girls: subtract 5 inches from father's height, average with mother's height. This gives the genetic target height with a range of plus or minus 2-3 inches.

What is a healthy BMI for a toddler?

This calculator does not say. Unlike adults, a child's healthy BMI range is not a fixed number — it depends on the child's exact age and sex and can only be read from the CDC's BMI-for-age growth charts. A pediatrician has the reference tables and your child's growth history needed to make that assessment.

How is toddler BMI different from adult BMI?

The BMI formula is the same, but the interpretation is not. Adult BMI uses fixed cutoffs. A child's BMI is plotted on age- and sex-specific CDC BMI-for-age growth charts as a percentile, not read as a raw number, and that plotting requires a pediatrician.

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Bottom Line

Choose the Adult Height Predictor for Children if you need to calculate predicted adult height. Use the Toddler BMI Calculator if you need to calculate bmi. Both calculators are free and require no sign-up.

Use Adult Height Predictor for Children Use Toddler BMI Calculator

Feature

Adult Height Predictor for Children

Toddler BMI Calculator