WinRate

Win rate is a measure used to describe the proportion of successful outcomes in a set of trials. It is typically expressed as a percentage and is calculated by dividing the number of wins by the total number of attempts, then multiplying by 100.

Formulaically, win rate = (wins / total attempts) × 100. For example, if a player wins 7 out of 10 matches, the win rate is 70%. Win rate is an empirical metric that reflects observed performance over a specified sample or period, and it can vary with sample size and selection.

Win rate is widely used across domains. In video games and competitive gaming, it often indicates player skill or effectiveness of strategies. In sports and tests, it summarizes historical success. In trading and investing, win rate can describe the proportion of profitable trades, though profitability also depends on profit per trade and risk management. In machine learning and A/B testing, win rate can measure the frequency of a favorable outcome in experiments or simulations.

Limitations and caveats. Win rate alone does not convey profitability or risk. A high win rate may accompany small gains or large losses, and a low sample size can mislead. It can be affected by luck, selection bias, or non-stationary conditions. Therefore, win rate should be considered alongside other metrics such as average gain per win, loss per loss, risk-reward ratio, and sample size.

Related concepts include win-loss ratio, hit rate, success rate, and profitability metrics. See also statistical significance and confidence intervals when interpreting win rate estimates.