1 Comparison tables of the different systems: Comparison table of ISO TR/11941, North Korean national system (1992), Revised Romanization, McCune-Reischauer, Yale (PDF file from UN Group of Experts on Geographical Names Working Group on Romanization Systems) Comparison table of IPA, Yale, McCune-Reischauer, Lukoff, South Korea Ministry of Education, ...
A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 1000 kg (= 106 g). The kilogram or kilogramme, (symbol: kg) is the SI base unit of mass. A gram is defined as one thousandth of a kilogram.
I'm pretty sure 1=1 a tonne is a metric tonne equal to 1000Kg or 2204.6lbs We have three different tons:   Long ton, in the United Kingdom Imperial system is 2,240 pounds, exactly 1,016.0469088 kg.   Short ton, in North America is 2,000 pounds or 907.18474 kg.