kilotonne

/K IH1 L AH0 T AH0 N/
noun
  1. 1

    A measure of the strength of an explosion or a bomb based on how many thousand tons of TNT would be needed to produce the same energy.

    โ€œThat's a 300-kiloton nuclear warhead.โ€

Source: https://en.wiktionary.org/wiki/kiloton, https://en.wiktionary.org/wiki/kilotonne