Kill-to-death ratio

A kill-to-death ratio, occasionally referred to as "K/D", is a player's kill to death spread ratio. It is a common statistic descriptor used in most multiplayer video games to inform the individual of one's performance in a game session.

Overview
A player's K/D is their number of kills divided by the number of times they died. If they are both the same then it will come out as one. If the player have more deaths than kills it will be a number between one and zero. If the player have more kills then deaths, then it can be any number above one. Bungie.net rounds K/Ds to the nearest hundredth.

"Kill-to-death spread" is not to be confused with "Kill-to-death ratio", as K/D Spread is a player's (or team's) total kills, minus their deaths. K/D Spread allows a quick comparasion of players after a match (or teams particully in the Multi Team playlist), while K/D Ratio provides a more accuate compaision over all the matches a player has played in. Having a good K/D Spread can be as simple as it being +1 or higher, however in unbalanced games with one pro or newbie, having a K/D Spread in the top half of the players. In the Playlist Action Sack, Tug of War is a game variant that depends on everyone on a team to have a good K/D Spread, as points are removed for dying as well as added for killing.

External reading

 * Microsoft: TrueSkill ranking system
 * GiantBomb: Kill to Death Ratio