The height toolkit
Find the right height tool
Choose by your question: compare two heights, understand growth references, or work with adult and sports measurements.
Compare & convert
Height Difference
Calculate the gap between two heights and see a proportional comparison.
Two heights → gap in cm and inches, ratio and a side-by-side chart.
Height Converter
Convert cm, metres, inches and feet with clear unit definitions.
One height → cm, metres, inches, decimal feet and feet/inches.
Image to Height
Calibrate a photo with a measured reference and estimate a person’s height.
A photo plus a measured reference in the same plane → a perspective-limited height estimate.
Average Height by Country
Search country means, compare rankings and understand the reference cohort.
Country and sex → an 18-year-old cohort mean; born in 1996, measured for 2014.
Children & growth
Height Calculator
Calculate a family-height reference and compare current height with CDC growth data.
Parents’ heights → family reference. Add a child’s measurement for CDC context; not a final-height prediction.
Height & Weight Percentile
Compare a child’s measurements with a CDC age- and sex-specific reference.
Age 2–20, sex and height and/or weight → CDC U.S. reference percentiles.
Baby Length Percentile
Explore WHO recumbent length references from birth to 24 months.
Age 0–24 months, sex and recumbent length → WHO length-for-age percentile.
Growth Velocity
Calculate height change and annualized growth between two measurements.
Two dated measurements → height change and annualized cm/year. Use the same measuring method.
Adults & sports
Ideal Body Weight
See an adult BMI screening range alongside four historical weight equations.
Adult height and sex → BMI screening range and historical formula comparisons. Not a personal target.
Dunk Calculator
Use measured standing reach to calculate the jump needed for a chosen target.
Measured standing reach, rim and clearance → required vertical jump. Not a guarantee of dunking.
Growth and weight results are reference information, not diagnoses. Each tool explains its methods, age limits and data sources. Photos are processed in your browser.