Convert Kilotonnes to Megatons
Convert Kilotonnes (kt) to Megatons (Mt) instantly and accurately.
Conversion Formula
Mt = kt × 0.001
About Kilotonnes
A kilotonne (kt) equals 1,000 metric tonnes (10⁶ kg). In military and geopolitical contexts, nuclear weapon yields are expressed in kilotons of TNT equivalent (kt TNT): the atomic bomb dropped on Hiroshima had a yield of approximately 15 kt TNT. Environmental science uses kilotonnes for reporting regional greenhouse gas inventories, industrial pollutant releases, and annual waste generation. Mining operations quote ore extraction rates in kilotonnes per day. The global atmospheric inventory of various trace gases is reported in kilotonnes.
About Megatons
A megaton (Mt) equals one million metric tonnes (10⁹ kg). Nuclear weapon yields are measured in megatons of TNT equivalent: the largest weapon ever detonated, the Soviet Tsar Bomba tested in 1961, had a yield of approximately 50 Mt TNT and produced a fireball 8 km in diameter. Annual global CO₂ emissions are reported in gigatons (Gt), but regional emissions data and specific industrial sectors are quoted in megatons. The Chicxulub asteroid impact that caused the Cretaceous-Paleogene mass extinction released energy equivalent to roughly 100 million Mt of TNT.
Quick Reference Table
| Kilotonnes (kt) | Megatons (Mt) |
|---|---|
| 1 kt | 0.001 Mt |
| 2 kt | 0.002 Mt |
| 5 kt | 0.005 Mt |
| 10 kt | 0.01 Mt |
| 25 kt | 0.025 Mt |
| 50 kt | 0.05 Mt |
| 100 kt | 0.1 Mt |