It was stated in "A Matter Of Honor" that Federation transporters have a range of 40,000 kilometers. If Klingon transporters have a similar range, this would indicate that one kellicam is approximately equal to two kilometers. This is the measurement given by the Star Trek Encyclopedia (4th ed., vol. 1, p. 409). The computer game Star Trek Online mission "House Pegh" corroborates this, noting that four kellicams is equal to roughly eight kilometers.