Memory Alpha
Memory Alpha

A square kilometer (km2) was a unit of area equal to one kilometer by one kilometer square. One square kilometer was equal to 1 million square meters. This unit of measure was used primarily on Earth and within Federation.

Comparative list of area[]

  • During the late 19th century, Greater London was hundreds of square kilometers in size. Knowing this fact, Dr. Katherine Pulaski was marveled by the holodeck's level of size and sophistication in recreating the city. Data reminded her that the holographic version of the London they were observing was "no larger than the holodeck, of course, so the computer adjusts by placing images of more distant perspectives on the holodeck walls." (TNG: "Elementary, Dear Data")
  • While preparing to search for a missing research team on Tilonus IV in 2369, William T. Riker noted that the building where they located was in the southwest quarter of the city, which itself covered over 200 square kilometers. He added, "That's a lot of land for one man to cover. I guess I'd better pack an extra pair of boots." (TNG: "Frame of Mind")
  • The energy barrier erected over the Ventu region of Ledos spanned thousands of square kilometer in area. (VOY: "Natural Law")
Omega crater on viewscreen

Some or all of the "over 300,000 square kilometers" destroyed by the Omega particle

  • The interior surface area of the Dyson sphere discovered by the USS Enterprise-D in 2369 was found to be over 1016 square kilometers, the equivalent of more than 250 million class M planets. To completely scan the interior surface would have took the Enterprise seven hours to complete. (TNG: "Relics")

10 to the 16th square kilometers is equal to 10 quadrillion square kilometers.

  • In the planetary file for Vacca VI, it is listed that the planet's polar region was 24.68 square kilometers. (TNG: "Homeward")

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