World Ranking Event Rules

The system rules are presented in the IOF World Ranking Scheme Rules which can be found here: . The rules includes rules for all four disciplines, FootO, MTBO, SkiO and TrailO. Older versions can be found on the same page in the document section, in the ‘Old’ folder.

Updates of the World Ranking System

August 2020

August 2020 - correction of a mistake in the Covid-19 adjusted counting months table. TrailO was by mistake set to 24 months as the normal counting period, but it shall be 18 months

July 2020, update of the WRS rules.

Summary rule changes:

  • Added Knock out sprint World Ranking points calculation for all FootO event levels, including WREs
  • Fixed the rebasing overall mean and standard deviation to mean = 1000 and standard deviation = 200

July 2020

The IOF FootO Commission did a thorough review of points allocation for World Ranking Events (WREs) compared with Major Events. The report stated that the mean of points allocated to WREs had been significantly lowered over time despite the changes implemented in 2019 and that an error in the system meant that the annual rebasing required by WR Rule 7.7 was implemented incorrectly. The report recommended changes that would give higher WRE points for WRE events other than Major Events. The following changes were approved by Council and have now been implemented:

  1. The yearly rebasing values were set to Mean = 1000 and standard deviation = 200. This is an amendment to WR Rule 7.7.
  2. All 2018 points have been rebased according to (1), then …
  3. points for all 2019 event events were recalculated, one by one and in chronological order, then …
  4. all recalculated 2019 points from (3) were rebased
  5. step 3 was repeated for all 2020 event results

As a result of this work, athletes’ points for the last 24 months will, in nearly every case, be significantly higher.

June 2020

Due to the COVID-19 outbreak, IOF Council stopped all IOF Events, including World Ranking Events, from 17th March. This means that there could be almost a whole season of ‘lost’ months out of the last 24 months on which points are based, affecting both Major events and WRE events. IOF Council decided to prolong the period that counts for the ‘top 5’ WRE events (in the case of Foot-O) that makes up an athlete’s World Ranking score. The guiding principle in the period extension is that:

  • All WREs in 2020 will be included in the WR scheme despite the “lost” months between March 17 and August 1.
  • There shall always be 7-8 counting Major Events within the World Ranking Period for FootO.
  • The 2021 season will be a normal season. If the 2021 season is still affected by COVID-19 outbreak, council will consider further prolongation.

The table below shows the changes in counting months for all 4 disciplines during the whole transition period. The IOF World Ranking scheme returns to standard counting months on 1st Jan 2022 for MTBO, July 1st 2022 for SkiO + TrailO and Jan 1st 2023 for FootO.


January 2019, rebasing were done.
March 2019, update of the WRS rules.
The most important aspects of the change from a world ranking follower and athlete perspective is that:
From 2019-01-01, all new World Ranking Events will follow the new World Ranking Scheme calculations.
If you look at a World Ranking list from 2019-01-01 and onward, the World Ranking lists will show the world ranking lists based on the new Scheme, even results that were earned before 2019-01-01.
If you produce a World Ranking list with a date that is before 2018-12-31, the World Ranking list will be calculated according to the old world ranking scheme.
This means that on the shifting date, 2019-01-01, there can be a slight change in positions in the World Ranking lists due to that all Scheme changes come into effect immediately at that date.

Summary rule changes:

  • Purpose of the WRS added
  • Aims of the WRS updated
  • FootO ranking based on the best 5 scores over 24 months
  • TrailO ranking based on the best 6 scores over 18 months
  • Reduced fixed weightings for Major Events
  • Base ranking algorithm refined to eliminate outliers.
  • Rules for Knock-Out Sprint added


No rule changes, only web interface changes


October 2017, update of the WRS rules.Changes:

  • 4 There are no limits on the number of World Ranking events that a Federation may organise each year.
  • 7.5 Rebasing makes the overall mean and standard deviation the same as the previous year; not necessarily 1000 and 200.
  • Include the TrailO ranking scheme.


No rules changes, only web interface changes.


December 2015, update of the WRS rules. Changes: 3.4 Where the M18E/W18E and/or M20E/W20E classes competing on the same courses and under the same conditions as the M21E/W21E classes, competitors in those other classes shall be included in the World Ranking calculations. For these other classes to be eligible for World Ranking Points, the start list must be prepared for course as a whole, not separately for each class.


First set of world ranking scheme rules were released for FootO, SkiO and MTBO. The ‘new’ WRS system were released 1st January.

About IOF World Ranking

This World Ranking system is owned and managed by the IOF. The programming of the IOF World Ranking system is performed by Tarmo Klaar, and the IOF wishes to express its sincere thanks to him for the excellent work.

All entries to events and results lists is handled through IOF Event management system, IOF Eventor.

This IOF World Ranking Scheme is valid from 1 January 2014 and this is also the date for which the first IOF World Ranking was calculated based on historic data from the period 1 July 2012 to 31 December 2013 as well as some earlier IOF Regional Orienteering Championships according to the rules. The ranking does not take into account any former World Ranking points, i.e. the calculations for 1 January 2014 IOF World Ranking have been started with zero points for all athletes.

All World Ranking Event results from the period 2001-2013 have been imported to this system but historic rankings prior to 1 January 2014 are currently not available.


If you have questions about the World Ranking Scheme and its implementation, please contact .

Mean and standard deviation for the period
From: to: RAW points