A practical Excel-based tool designed to help coaches, sport scientists, academies, and researchers better understand biological maturity in youth athletes.
This calculator estimates maturity offset, or years from peak height velocity, using the anthropometric equations proposed by Mirwald et al. It also includes relative age effect classification, helping users identify how birth date and maturity status may influence youth athlete development, selection, and performance interpretation.
Full Feature Set
✅ Maturity offset estimation using sex-specific Mirwald equations
✅ Estimated age at peak height velocity
✅ Pre-PHV / Circa-PHV / Post-PHV maturity classification
✅ Relative age quartile classification
✅ Athlete dashboard with clean red-and-black visuals
✅ Automatic calculations from simple anthropometric inputs
✅ Designed for coaches, sport scientists, academies, and researchers
✅ Practical support for talent development, growth monitoring, and youth athlete profiling
This tool helps move beyond chronological age alone and supports a more informed interpretation of youth athlete development.
Make maturity data practical.
Currently, the Maturity Offset & Relative Age Effect Calculator is designed in Microsoft Excel and works best in modern Excel versions.