This calculator follows the principles outlined in Howard Grubb’s Masters Long Distance Running (LDR) age-grading system, specifically for road races. Check out:
Masters LDR Age-Grading Calculator
Standard Times Reference
| Distance | Male Standard | Female Standard |
|---|---|---|
| 1 Mile | 3:55 | 4:25 |
| 3K | 8:10 | 9:10 |
| 2 Miles | 8:45 | 9:50 |
| 5K | 14:45 | 16:30 |
| 4 Miles | 19:20 | 21:45 |
| 8K | 24:30 | 27:30 |
| 5 Miles | 24:30 | 27:30 |
| 10K | 30:40 | 34:20 |
| 10 Miles | 50:30 | 57:40 |
| 20K | 1:02:30 | 1:11:00 |
| Half Marathon | 1:07:20 | 1:16:00 |
| Marathon | 2:15:00 | 2:38:00 |
How to Use This Calculator
- Select your race distance from the dropdown
- Enter your finish time in HH:MM:SS format
- Enter your age (must be 35 or older)
- Select your gender
- Click "Calculate Age-Grading"
What the Results Mean
- Age-Graded Percentage: Shows your performance as a percentage of the world record standard for your age. Higher percentages indicate better performance.
- Age-Standard Time: The expected time for your age based on the standard.
- Age-Graded Time: Your performance converted to what it would be at prime age (approximately 30 years old).
Notes
This calculator provides a simplified version of age-grading based on Howard Grubb's methodology. For more precise calculations, especially for elite athletes, you may want to consult the full tables and formulas at the reference website.
The age adjustment factors are approximations. The actual factors may vary slightly based on detailed age-grading tables.