Estimate expected adult height using child measurements and parents' heights, predict future height from parents alone, and convert height between US and metric units.
This estimate uses the child's age, height, weight, and both parents' heights. Ages outside the reference band are matched to the nearest available coefficient set.
This estimate follows the same reference approach in metric units and is best used as a planning estimate, not a medical prediction.
This section uses the mid-parental height method only, making it useful for unborn children or very young infants.
The male prediction adds 13 cm to the parental average, and the female prediction subtracts 13 cm from the parental average.
The Height Calculator on CalculatorFlix.com gives you a quick estimate of height, but results can vary based on genetics, diet, growth stage, and overall health. This tool is a helpful starting point, but it should not replace professional medical guidance.
Verified on April 6, 2026 by the CalculatorFlix Content Team for clarity and user safety.
This page gives users a fast, straightforward way to estimate current or future height. It is built for general reference only and should not be treated as a medical diagnosis or a precise growth measurement.
Reviewed by a content editor for clarity, accuracy, and everyday use.
A Height Calculator helps you do three things quickly: measure, convert, and estimate height. You can use it to convert height units or get a general idea of a child’s possible future height based on basic inputs like age and parental height.
It's a practical planning tool for everyday use — not a replacement for professional medical guidance.
U.S. adults average about 5'9" for men and 5'4" for women, according to CDC data. Ever wondered how you measure up?
This calculator works off the information you enter. For height conversion, it instantly switches between feet, inches, and centimeters. For future height prediction, it uses basic growth inputs to provide a general estimate. Simple, fast, and easy to use — just treat predicted results as a helpful guide rather than a fixed number.
Blame your parents for your height — but only partly. Genetics is the biggest piece of the puzzle, but how you eat, sleep, stay active, and manage your health during your growing years all add up too. Healthy habits keep development on track, while poor nutrition, ongoing illness, or hormonal imbalances can sometimes get in the way of normal growth.
| Age | Average Boy Height | Average Girl Height |
|---|---|---|
| 2 years | 2'11" (34") | 2'10" (33.5") |
| 4 years | 3'5" (40") | 3'4" (39.5") |
| 6 years | 3'10" (45") | 3'9" (44.5") |
| 8 years | 4'2" (50") | 4'2" (50") |
| 10 years | 4'6" (54") | 4'7" (55") |
| 12 years | 4'11" (58") | 5'1" (60") |
| 14 years | 5'4" (63") | 5'3" (63") |
| 16 years | 5'7" (67") | 5'4" (64") |
| 18 years | 5'9" (69") | 5'4" (64") |
*Source: CDC Growth Charts — US reference data.Individual height varies based on genetics, nutrition, and overall health.*
| Common Myths | Facts |
|---|---|
| Drinking more water increases height | Water keeps your body healthy, but it doesn't directly affect how tall you grow |
| Children stop growing early on | Most kids and teens continue growing throughout their puberty years |
| Regular stretching adds permanent height | Stretching helps posture and movement — bone length stays the same |
| Your height is purely genetic | Genes matter most, but good nutrition, sleep, and health play a real role too |
| A single night of sleep makes you taller | Good sleep supports steady growth over time, not just one night |
*These are general reference points only. Always consult a healthcare provider for personalized guidance.*
Three simple steps to get started:
Recheck your inputs for accuracy and always use the results as a general guide.
This calculator uses the Mid-Parental Height Formula for general estimates. For more advanced prediction, the Khamis-Roche Method is a widely recognized scientific approach that factors in age, gender, weight, and parent heights for a more refined result.
All results are estimates. Genetics, nutrition, sleep, and health all affect actual height.
| Input Type | Example Input | Result Type | Example Output |
|---|---|---|---|
| Height Conversion | 5'6" | Metric | 167.64 cm |
| Height Conversion | 170 cm | Imperial | 5'7" |
| Height Prediction | Parent heights | Adult height | Approx. final height |
| Growth Estimate | Age + current height | Projection | Est. height range |
*Results are general estimates only. Always consult a healthcare provider for medical guidance.*
When in doubt, always trust your instincts as a parent. If anything about your child's growth feels unusual, a paediatrician is the right call. Consider scheduling a visit if:
This tool is for general reference only. Always consult a licensed U.S. healthcare provider for medical concerns related to growth and development.
A: Reliable for general use — actual results may vary.
A: Enter parent heights and age for a quick general estimate.
A: Averages both parents' heights plus a small gender adjustment.
A: Genetics leads, but nutrition, sleep, and health all chip in too.
A: Most boys finish growing by their late teens.
A: Girls typically reach full height between ages 14 and 16.
A: Once growth plates close, increasing height naturally isn't really possible.
A: Yes, switch between feet/inches and centimeters instantly.
A: Deep sleep triggers growth hormone release — key during growing years.
A: Yes, a long-term poor diet can slow down healthy growth.
A: 100% free — no sign-up needed.
A: Yes, just open it in your phone's browser, no app needed.
A: No, this is a general guide only. Your doctor always has the final word.
A: Feet, inches, and centimeters — all supported.
A: It supports healthy growth, but won't directly increase bone length.
No appointments. No guesswork. Just a quick, reliable height estimate whenever you need one. Try the Height Calculator on CalculatorFlix today and get your result in seconds.