Swing% is one of the indicators of modern CS2 statistics. It answers a question that neither K/D nor the number of frags can: how much a player's actions brought their team closer to winning the round or pushed it further away.
How it works
The metric is based on the team's probability of winning the round. At any moment it can be estimated from the situation: how many players are alive on each side, where the bomb is, what weapons the teams have, and how much time is left. Every event shifts that chance. A kill, an assist, planting or defusing the bomb, a death, surviving the round: all of these move the odds up or down. The size of the shift is called the swing, and a player's total swing over a round or a match is expressed as a percentage.
That is why swing can be both positive and negative. A death that leaves the team outnumbered gives a minus. A kill that restores the odds gives a plus.
Why not all frags are equal
Two identical kills can be worth very different amounts. Typical examples:
- A player finishes off the last opponent when their team has five players alive. The round is already won, so the swing is minimal.
- A player gets the first kill on entering the bombsite. The team immediately gains a numerical advantage, and the swing is significant.
- A player pulls off a clutch, a situation where they are left alone against several opponents. The probability of winning was close to zero beforehand, so the swing is very large.
- A player kills an opponent when the team has already lost the round and nothing important is left on the map. The swing is almost zero, even though in the table it is an ordinary frag.
This is how the metric separates players who pad their numbers from those who decide the outcome of rounds. This matters to analysts, because ordinary statistics often overstate the contribution of players who kill in already decided situations and understate the contribution of those who do the "invisible" work: opening up the site, winning the first duel, trading with an opponent.
How to read the number
A high Swing% means that a player regularly performs actions at important moments. A low one does not necessarily mean weak play. Role matters too: players who go in first more often and take on the risk have higher values, while those who play in a support role and work more with utility (grenades: smokes, flashbangs, molotovs) make a smaller direct contribution in kills. That is why Swing% is best viewed together with ADR (average damage per round), K/D and the overall picture of the match, rather than as the sole assessment of a player.
The name comes from the English word swing, meaning "oscillation" or "shift": this is how the metric describes the pendulum of a team's chances over the course of a round.