Methodology

What is Elo?

Elo is a relative skill rating system originally developed by physicist Arpad Elo for chess. Every team carries a single number; when two teams play, points flow from the underdog to the favorite based on the result and on the gap in ratings beforehand. The system is zero-sum: every point one team gains, another loses.

The formula

Each team's expected result against an opponent is a logistic function of the rating difference:

E_A = 1 / (1 + 10^((R_B − R_A − HA) / 400))

Where R_A and R_B are the two teams' ratings, and HA is a home-advantage adjustment (typically +100 Elo for the home side, 0 at neutral venues).

After a match:

R'_A = R_A + K × G × (S_A − E_A)

K weights the importance of the match (friendlies are lower, World Cup knockout games are higher). G adjusts for goal difference. S_A is the actual result: 1 for win, 0.5 for draw, 0 for loss.

Reading the numbers

• 2100+: Elite. A top-3 side in the world. Spain, Argentina, France at their best.
• 2000–2099: World class. Realistic title contenders at major tournaments.
• 1900–1999: Top tier. Capable of beating anyone on the day.
• 1800–1899: Strong. Reliable knockout-round teams.
• 1700–1799: Competitive. World Cup qualifiers.
• 1600–1699: Developing. Solid regional sides.
• Below 1600: Emerging programs.

Data source

Ratings are based on the publicly published World Football Elo Ratings, the de facto standard for national-team Elo, originally compiled by Bob Runyan and now maintained on eloratings.net. World Cup Elo focuses on men's senior national teams.

A note on forecasts

Win probabilities and tournament odds shown on this site are derived directly from current Elo ratings. They do not account for injuries, recent form trends, travel fatigue, or stylistic matchups. Treat them as a baseline: a starting point for conversation, not a forecast.