xG Delta (Sobreperformance)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Gols - xG
About this calculator
The xG Delta (Outperformance) calculator measures the difference between actual goals scored and expected goals (xG). This helps identify if a team or player is outperforming or underperforming based on chances created.
The formula is straightforward: Goals - xG. A positive result means the team scored more than expected from their opportunities. A negative value indicates lower efficiency in converting chances.
It is useful in performance analysis, such as evaluating an attacker's form on bad days or the impact of luck. However, it doesn't account for factors like key passes or goalkeeper saves, limiting its scope to purely offensive metrics.
It's recommended to use xG Delta alongside other metrics, like xG per game or xG against, for a fuller understanding of overall performance. Extreme values may reflect luck or random errors, not sustained trends.
Frequently asked questions
What is xG delta?
It's the difference between actual goals and expected goals (xG), showing if a team or player is converting chances better or worse than expected.
When to use xG delta?
Use it to analyze offensive efficiency in matches or leagues, especially when assessing luck or exceptional performance factors.
How to interpret positive or negative values?
Positive values mean better-than-expected performance; negatives indicate worse. Small variations may be random fluctuations.
What are the limitations of xG delta?
It doesn't account for goalkeeper saves, key passes, or contextual factors like opponent pressure, focusing only on created chances.