Ryan Childers, Web Developer
Web Developer · 7 years building health tools
Ryan Childers is a web developer with 7 years of experience building health tools. He built every calculator on Height Calculators, from the main height calculator to the height percentile, mid-parental and waist-to-height tools.
What Ryan Does at Height Calculators
- Builds and maintains every height calculator on the site
- Turns published methods, like the Khamis-Roche method and CDC growth charts, into tools that work on any phone or computer
- Tests each calculator against the original formulas and worked examples before it goes live
- Updates tools when a standard changes, such as the Army's waist-to-height rule
How Ryan Builds Our Height Calculators
- Every formula comes from a published source, listed on the calculator's page.
- Results always show a range, not just one number.
- Calculators run in your browser, so the numbers you type are never stored.