The ITRA score is calculated based on a runner’s finish time VS the specific characteristics of the race he has participated in.
Scores are built on a scale up to a maximum of 1000 score with the top of the scale corresponding to the theoretical best possible performance.
It's calculated in two steps, and considers different parameters:
1) Measurable factors: The distance & elevation data are turned into a flat equivalent distance (km-effort)
- Distance
- Elevation change (up & down)
- Minimum, average, and maximum altitude
For each flat equivalent distance, there is a corresponding world record, based on official athletics world records.
2) Non-objective factors: These factors are translated into a coefficient of adjustment after ITRA algorithm's analysis
- Terrain type (dry, muddy, snowy, forested, sandy, etc.)
- Racing conditions (temperature, weather, humidity, wind, etc.)
- Any other factors directly influencing performance
These non-objectives factors are mathematically translated into a coefficient of adjustment that reflects all the factors affecting a runners' performance.
The ITRA score calculation: Race's finish time for a flat equivalent distance + race condition coefficient of adjustment = ITRA score
1) Flat equivalent world record
A runner's finish time is compared with the theoretical flat equivalent best possible performance for that race. It gives the raw ITRA score value.
2) Coefficient of adjustment
A statistical analysis taking into account all the non-objectives factors influencing the performance is done thanks to ITRA's algorithm.
We name this step the "coefficient of adjustment"
This coefficient adjusts the raw ITRA score value previously obtained and calculates the final ITRA score.
Our calculation uses an indirect method, based on the statistical analysis of our database of more than 8 million individual results, to also account for this factor.
The same algorithm is used to calculate the score for all races.
Each race has its own adjustment coefficient, which is applied equally to all runners in that race.
This method has two major advantages:
- we can consider any factor influencing the race time.
- our data base and scoring system is constantly improved with every race.
Please note that the following factors do not affect the score obtained during a race:
- Your race ranking
- Number of withdrawals (dnf)
- Presence of elite runners or not
- Event's fame