ITRA Index Calculator
Estimate the ITRA or UTMB Index score (0-1000) a race result is worth, or the finish time a target index needs - free, no signup.
This free calculator estimates the ITRA Performance Index or UTMB Index (0-1000) a race result is worth, from your finish time and the course's distance and climb - or the finish time a target index needs. Official scores use proprietary formulas: look yours up at itra.run (opens in a new tab) or utmb.world. For what the scores mean and how ITRA calculates them, see how the ITRA index is calculated, and how it differs from the UTMB Index.
Enter distance, elevation gain, and finish time to estimate the index range for your result.
ITRA score and UTMB Index - what they are
The ITRA Performance Index is the International Trail Running Association's 0-1000 rating of trail runners, a weighted mean of up to your 5 best result scores over the past 36 months. The UTMB Index is UTMB World's separate 0-1000 score for UTMB World Series racing, with its own 20K, 50K, 100K and 100M categories. Both are computed from your finish times against course difficulty, so this calculator can estimate either from a result.
The two are computed independently, from different race databases, so do not expect the numbers to match exactly. For how each one is calculated, what counts as a good score and why the UTMB Index is not the same thing as Running Stones, read how the ITRA index is calculated, and how it differs from the UTMB Index.
How to check your official ITRA score or UTMB Index
Your official scores already exist if you have finished evaluated races - you just have to look them up, for free:
- ITRA Performance Index Go to itra.run (opens in a new tab) and search your name. Your profile shows your general index, category indexes, and race history.
- UTMB Index Go to utmb.world's runner search (opens in a new tab) and search your name. Your public profile shows your general and per-category UTMB Index.
How to use the ITRA Score & UTMB Index Estimator
- 1
Pick a race or enter course details
Choose a race preset (UTMB, CCC, OCC, Western States...) to pre-fill distance and elevation gain, or type your own course figures.
- 2
Enter your finish time
Use hh:mm or hh:mm:ss. Any finished result works - the estimator scores the performance, not the ranking.
- 3
Read the estimated range
You get an estimated index range (for example 635-685), the km-effort of the course, and the UTMB race category. The range is a calibrated estimate, never an official value.
- 4
Check your official score
Follow the itra.run and utmb.world links to look up your real index - the estimate tells you what to expect there.
How this estimator works
The estimator uses ITRA's public course-effort concept: km-effort = distance + elevation gain / 100. A 50 km race with 3,100 m of climbing is an 81 km-effort course. From your finish time it computes a flat-equivalent speed (km-effort per hour), then maps that speed to a 0-1000 score.
- Calibration pairs: the score curve is calibrated on 24 public result-to-index pairs read from public utmb.world athlete profiles in July 2026 - from back-of-pack (index ~360) to Jim Walmsley, Kilian Jornet, and Tom Evans (940+).
- Holdout accuracy: the calibration held up on reserved test anchors to within about 25 points, which is why the output is a range, not a number.
- What the model cannot see: altitude, heat, terrain technicality, and how ITRA or UTMB actually scored the race - Hardrock finishers, for example, earn more than their raw speed suggests.
- 20K races: races under 50 km-effort (the 20K category) are not estimated because we could not source enough public calibration data for them. This site is not affiliated with ITRA or the UTMB Group; every number here is an estimate.
UTMB Index mechanics: utmb.world/utmb-index/info and utmb.world/sports-system. ITRA Performance Index: itra.run/FAQ/PerformanceIndex. Calibration anchors: public utmb.world runner profiles, fetched 2026-07-16, embedded with source URLs in the model.
Frequently asked questions
How do I check my official ITRA or UTMB score?
Both lookups are free. For your ITRA Performance Index, use the runner search at itra.run (Runners - Find a runner). For your UTMB Index, use the runner search at utmb.world or open your runner profile if you have raced a UTMB World Series event. This estimator deliberately links to both - it never replaces the official lookup.
How do I calculate my ITRA score?
You cannot reproduce your official number: ITRA and UTMB World score each result with proprietary formulas they do not publish. What you can calculate is an estimate. This calculator takes the course's km-effort (distance + elevation gain / 100) and your finish time, converts them to a flat-equivalent speed, and maps that speed to a 0-1000 score calibrated on public results - giving a range, such as 635-685, rather than a single number.
How accurate is the estimate?
On reserved test results the calibration held to within about 25 points, which is why it shows a range. It cannot see altitude, heat, terrain technicality or how ITRA and UTMB actually scored the race, so a very technical or high-altitude course can be worth more than its raw speed suggests - Hardrock is the usual example. Races under 50 km-effort (the 20K category) are not estimated at all.
How long do results count toward my index?
For the UTMB Index, results from the past 36 months count, with full value in the first 12 months and progressively less weight after that; you also need at least one race in the past 24 months for your index to remain valid. The ITRA index uses the same 36-month rolling window with the same 12-month full-value rule. In both systems your index slowly decreases as results age, even if you do not race.
What are ITRA points, and are they the same as the ITRA index?
No - they rate different things. ITRA endurance points rate the race, not the runner: every finisher of a given race earns the same number, on a 0 to 6 scale set by the course's km-effort. The ITRA Performance Index rates you, on 0-1000, from your finish times. Points are also not what gets you into UTMB Mont-Blanc any more: that lottery asks for one Running Stone earned in the past two years plus a valid UTMB Index in the category you are entering.
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