V2 Youth OS
Youth OS Home · V2Fitness
MODULE 02 · FREE EARLY ACCESS · NO ACCOUNT REQUIRED
GROWTH-SPURT TIMING

Growth Spurt & PHV Estimator

Estimate possible timing before or after Peak Height Velocity using the Mirwald anthropometric maturity-offset method. This is a separate module because PHV timing and adult-height estimation answer different questions.

Why it may helpAdds growth context to coaching, movement and workload conversations.
What it does not doIt does not diagnose puberty, skeletal age, injury or readiness.
What matters mostPain, health, movement, workload, sleep and qualified judgement remain essential.
Child details
✓ Child details carried over from Module 01
THIS BROWSER SESSION Edit in Module 01
Name—
Sex—
Date of birth—
Exact age—
Standing height—
Weight—

Complete Module 01 first

Module 02 reuses the child's name, sex, date of birth, standing height and weight from the Adult Height Estimator. This avoids asking you to enter the same details twice.

Go to Module 01 →
Your Module 01 details are already loaded. Enter only sitting height, select measurement quality and confirm the statements below.
Measure vertically from the sitting surface to the top of the head.
How to measure sitting height A child sits upright on a firm box against a wall. A vertical arrow measures from the top of the box to the top of the head. SITTING HEIGHT Firm box • back upright • head level

How to measure sitting height

  1. Place a firm, flat box or bench against a wall.
  2. Have the child sit tall, looking straight ahead, with the back upright.
  3. Keep the thighs supported and feet still.
  4. Measure vertically from the sitting surface to the highest point of the head.
  5. Measure twice and use the closest repeatable value.
Do not measure from the floor. The box or bench height must be excluded.
Please confirm all three statements above to continue
Estimated maturity offset
—

—

Estimated age at PHV—
Measurement confidence—
General interpretation—
Next stepRepeat accurate measurements over time and discuss concerns with an appropriate professional.
Important: Typical individual error can be substantial, and predicted age at PHV can vary by age and population. Do not use this result alone to prescribe training load, diagnose maturity, select talent or make return-to-sport decisions.
🔒 All measurements and results remain in this browser. V2Fitness does not collect, transmit or store them.
← Module 01: Adult Height Estimator