World Rugby Rankings

How the World Rugby Rankings work

The men’s and women’s World Rugby Rankings both run on a system called “Points Exchange.” The idea is simple: whenever two teams play, they trade rating points based on the result. Whatever one side picks up, the other side loses by exactly the same amount. Nothing is created or destroyed. It just moves across the table.

Three things decide how many points change hands:

Every full member union has a rating, and these ratings usually sit somewhere between 0 and 100. The best team in the world will typically be rated above 90.

Which matches count

Only full international matches between two World Rugby full member unions affect the rankings. If a game does not meet that standard, it has zero impact on either team’s rating.

There is one important exception in how heavily a match is weighted. Points exchanges are doubled during a Rugby World Cup, which reflects just how much that tournament matters. Outside of that, every other full international is treated exactly the same.

How women’s teams get their starting points

The women’s rankings work on the same Points Exchange engine as the men’s, with one difference. The way a team’s starting rating is calculated when it plays its very first ranked match follows its own protocol, rather than mirroring the men’s approach exactly.

A worked example: Wales vs Scotland

The best way to understand the maths is to walk through an actual points exchange. In this example, Wales are at home against Scotland.

  1. 1 Note the current ratings

    Wales start the day rated 76.92 and Scotland start rated 76.36. Two teams that are very close in strength.

    Wales 76.92
    Scotland 76.36

  2. 2 Apply home advantage

    The home team gets treated as if they are three rating points stronger than they really are. This “handicaps” them, meaning they pick up fewer points for a win and hand over more for a loss. It is the system’s way of cancelling out the natural edge of playing at home.

    Wales → 76.92 + 3 = 79.92 · Scotland stay on 76.36

  3. 3 Work out the Rating Gap

    The Rating Gap is simply the difference between the two adjusted ratings.

    79.92 − 76.36 = 3.56 in Wales’ favour

  4. 4 Check the possible outcomes

    The Core Rating Change depends on both the result and that Rating Gap. With a gap of 3.56:

    Wales win +0.64 / −0.64 Favourite earns little
    Draw −0.36 / +0.36 Wales lose a little
    Scotland win +1.36 / −1.36 Upset pays more

    Because Wales are the stronger side once you account for home advantage, beating Scotland earns them relatively little, while losing would cost them a lot. Scotland, as the underdog, stand to gain far more from an upset.

  5. 5 Apply the weighting factors

    If a team wins by more than 15 points, the Core Rating Change is multiplied by 1.5. So if Wales had won 30–10, the exchange would be 0.64 × 1.5 = 0.96. And if this were a Rugby World Cup Finals match, the change would then be doubled on top of that.

Common questions

Do teams get credit for losing narrowly to a stronger opponent?
No. In this system you cannot earn points for a loss, and you cannot lose points for a win. Rewarding brave defeats might sound appealing, but taking points away from a team that actually won is a lot harder to justify. And if a close result really does signal a genuine shift in strength, that shift will show up naturally in later matches anyway.
How much does margin of victory matter?
Less than you might think. Research showed that results matter more than margins when it comes to producing accurate rankings. Whether a side beats much weaker opposition by 60 points or 100 points tells you very little about how good they actually are. That said, winning comfortably does carry meaning, so a weighting kicks in when a team wins by more than 15 points, rewarding a victory with “something to spare.”
Are all matches treated as equally important?
Almost all of them, yes. The one exception is the Rugby World Cup, where points exchanges are doubled. Every other full international counts the same.
Will teams tend to rise at certain times of year, such as after the Six Nations?
No. Because every match is a zero-sum exchange, there is no built-in advantage to simply playing more games. A team’s rating stays exactly where it is until they next take the field. Many matches produce only tiny movements, and a “predictable” result can lead to little or no change at all.
How much do past achievements count?
The rankings are built to reflect current strength, not history. Older successes gradually fade in importance and get replaced by more recent results.
How does the system handle freak results?
There is a cap on how far any team’s rating can move up or down from a single match. This stops the rankings from overreacting to one unusual scoreline.
How do you allow for home advantage?
When calculating an exchange, the home side is treated as if they are three rating points better than their actual rating. This “handicaps” them, so they gain fewer points for a win and give away more for a loss, which effectively neutralises the benefit of playing at home.

Is the system actually reliable?

The rankings are checked in several objective ways, and one of the most important is “Predictive Accuracy.” If, over time, the system consistently does a good job of predicting which team will win a given match, that is strong evidence it is capturing current strength accurately and responding sensibly to changes in form.