Race Age Grading Calculator
Calculate your age-graded race performance percentage to compare results across ages using a simplified model.
Age-Graded Performance
55.0 %
Age-Graded Performance vs Your Race Time
Age-Graded Running Performance
Age grading adjusts race times to account for the natural decline in performance with age, allowing fair comparison across all ages.
Simplified Model
Age Factor = 1 + 0.0005 x Age - 28
Age-Adjusted Time = Actual Time / Age Factor
Age Grade % = World Record / Age-Adjusted Time x 100
This simplified model peaks at age 28 and applies a power-law decline. Official age-grading tables from World Athletics use detailed lookup tables derived from age-group world records.
Example Calculation
A 45-year-old runs a 5K in 25 minutes (world record approximately 12.7 min).
- 01Age factor = 1 + 0.0005 x |45-28|^1.8 = 1 + 0.0005 x 17^1.8 = 1 + 0.0005 x 186.1 = 1.093
- 02Age-adjusted time = 25 / 1.093 = 22.87 min
- 03Age grade = 12.7 / 22.87 x 100 = 55.5%
Frequently Asked Questions
Learn More
Understanding Batting Average - A Complete Guide to Baseball's Key Stat
Learn how batting average is calculated, what makes a good average, and how it compares to modern baseball statistics like OBP and OPS.