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
These are the situations this tool is meant for. If your task is close to one of these, the examples and notes below can help you choose the right inputs.
- 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.
You do not need to memorize the formula first. Start by matching each input label on the calculator to the number, date, unit, or setting you actually have.
The formula in plain language
In plain language: The calculator converts parent heights to inches, averages them, then adds 5 inches for a male estimate or subtracts 5 inches for a female estimate. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
If that sounds abstract, use the example cards on the calculator page. They show a complete set of inputs and the kind of answer you should expect.
How to read the answer
Read the headline result first. Then look at the smaller supporting lines because they explain the parts behind the answer, such as totals, units, ranges, or formula steps.
- 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
If the answer looks strange, the most likely cause is a small input mismatch: the wrong unit, date, weight, scale, mode, or policy assumption.
- 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.
Research and references
These references shaped the calculator assumptions, unit choices, or safety notes.
Examples from the calculator
About 5 ft 9 in
About 5 ft 5 in
Adult height estimate in 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 values, dates, units, or settings the page asks for.
What is the Height Calculator doing with my inputs?
In plain language: The calculator converts parent heights to inches, averages them, then adds 5 inches for a male estimate or subtracts 5 inches for a female estimate. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
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 that you used the right unit, date, scale, or mode because small input changes can change the result.
Related tools
- Healthy Weight Calculator Find the adult healthy BMI weight range for a height.
- Ideal Weight Calculator Estimate ideal body weight and compare it with healthy BMI range.
- BMI Calculator Estimate adult body mass index and healthy BMI weight range.
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 paste the expression and result into notes, homework, a message, or another document. Check the units and assumptions before copying.