1. What is the Age Graded Running Calculator?

The Age Graded Running Calculator (Grubb formula) calculates how a runner's performance compares to the world record for their age and gender. It provides a percentage that indicates the quality of the performance relative to the best possible performance for that age group.

2. How Does the Calculator Work?

The calculator uses the Grubb formula:

Where:

• \( Age\ Standard \) — World record time for the runner's age and gender (minutes)
• \( Time \) — The runner's actual time (minutes)

Explanation: The equation compares the runner's time to the age-standard world record time. A percentage of 100% means the performance equals the world record for that age group.

3. Importance of Age Grading

Details: Age grading allows runners of different ages and genders to compare performances fairly. It helps track performance changes over time and provides motivation by showing how close one is to world-class standards.

4. Using the Calculator

Tips: Enter the age standard world record time (in minutes) and your actual time (in minutes). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find age standard times?
A: Age standard times are published by World Masters Athletics and other running organizations for various distances.

Q2: What is a good age graded percentage?
A: Over 90% is world class, 80-90% is national class, 70-80% is regional class, and 60-70% is local class.

Q3: Does this work for all running distances?
A: Yes, as long as you have the correct age standard time for your distance.

Q4: How does age grading account for gender differences?
A: There are separate age standard times for men and women for each age group.

Q5: Can I use this for other sports?
A: The concept applies to other sports, but you would need sport-specific age standards.