Quick start
- Choose the estimate type for the child.
- Enter each parent height using feet and extra inches.
- Calculate to see an estimated height and a rough range.
Best uses
Start here if one of these sounds like your job. The examples below show which inputs matter most.
- Estimate a child adult height from parent heights.
- Compare the result in feet, inches, and centimeters.
- See an approximate plus-or-minus range instead of one exact promise.
- Understand why growth estimates are not medical predictions.
What this calculator is solving
The Height Calculator uses a simple mid-parental estimate. It is useful for understanding the math behind a rough family-height prediction, but it should not be treated as a medical growth forecast.
Match each input label on the calculator to the child estimate type and each parent height in feet plus extra inches.
The formula in plain language
In plain language: The calculator converts both parent heights to inches. For a male estimate it adds 5 inches to the parent-height total before dividing by 2. For a female estimate it subtracts 5 inches before dividing by 2. The examples on the page are there so you can compare your inputs with a parent-height example before copying the answer.
For a male estimate, the calculator adds 5 inches to the two parent heights before dividing by 2. For a female estimate, it subtracts 5 inches before dividing by 2.
How to read the answer
Read the rounded feet-and-inches estimate first, then check the centimeter line and the rough plus-or-minus range. The range is not decoration; it is the honest part of the answer.
- The main answer is the estimated adult height in feet and inches.
- The range line is important because real growth does not follow one exact number.
- The centimeter line helps when you need metric context.
Common mistakes to avoid
Most wrong height estimates come from entering inches in the feet box, using a decimal like 5.8 for 5 ft 8 in, or treating the midpoint as a promise.
- Do not use this for medical decisions.
- Do not ignore growth patterns, puberty timing, nutrition, or health history.
- Check that feet and inches were entered separately and not as one decimal height.
Quick example
If the mother is 5 ft 4 in and the father is 5 ft 10 in, the male estimate uses 64 + 70 + 5, then divides by 2. That gives 69.5 inches, which the tool rounds to about 5 ft 10 in.
What the range means
The rough range is there because real growth does not land on one perfect number. Genes matter a lot, but puberty timing, nutrition, health, and normal variation can move the final adult height.
This page does not use a child height percentile, weight, bone age, or growth-chart history. Those checks need more information than two parent heights.
When to check a growth chart
Use CDC growth charts or a clinician when the question is about whether a child is growing normally. A mid-parental estimate can be useful background, but it cannot spot growth problems by itself.
Research and references
These references help check the measurements, units, limits, or safety notes used in this guide.
Worked examples for Height Calculator
About 5 ft 10 in
About 5 ft 5 in
About 176.5 cm
FAQ in plain language
When should I use the Height Calculator?
Use it when your task matches one of these common needs: Estimate a child adult height from parent heights. Compare the result in feet, inches, and centimeters. It works best when you already know the child estimate type and both parent heights in feet plus extra inches.
What is the Height Calculator doing with my inputs?
In plain language: The calculator converts both parent heights to inches. For a male estimate it adds 5 inches to the parent-height total before dividing by 2. For a female estimate it subtracts 5 inches before dividing by 2. The examples on the page are there so you can compare your inputs with a parent-height example before copying the answer.
What do the main Height Calculator inputs mean?
Child estimate: the formula path for a male or female adult-height estimate. Mother feet and extra inches: the mother height split into whole feet and leftover inches. Father feet and extra inches: the father height split into whole feet and leftover inches. Approximate range: the estimate plus or minus 4 inches, because real adult height can land above or below the midpoint.
What should I double-check before trusting the answer?
This is only a family-height estimate. Nutrition, health, puberty timing, genetics, and medical conditions can change growth. Also check child estimate type, mother height, father height, feet, extra inches, and whether you need a growth chart instead of a rough family estimate.
How should I read the Height Calculator answer?
Read the rounded feet-and-inches estimate first, then the centimeter value, then the rough plus-or-minus range. The range matters because real adult height can finish above or below the midpoint.
Is this the same as a growth chart?
No. This calculator only uses parent heights. A growth chart uses a child age, sex, height, weight, and past measurements to see how growth is tracking over time.
Why is there a plus-or-minus 4 inch range?
Mid-parental height is a rough target, not a promise. Pediatric references often use about 4 inches on each side as a target range because children can finish taller or shorter than the midpoint.
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Keep exploring
If this guide is close but not exact, these links keep you near the same kind of problem.
- Health & Fitness Browse the full category for related tools that help with the same job.
- All free tools Search the complete Access Free Tools library by task, category, or tool name.
- All calculator and utility guides Find more plain-language examples, formulas, mistakes, and result explanations.
- Free calculator resources Start here when you are not sure which calculator page fits.
Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to save the parent heights, estimated adult height, centimeter value, or rough range. Check the child estimate type and growth-chart context before using it in a serious health conversation.