A short Ton is the US customary version, is equal to 2,000 lbs. A long Ton or Imperial Ton is mostly outdated and is equal to 2,240 lbs. A tonne, also known as a metric Ton, is equal to 1000kg or 2,204.6 lbs. – WTF Fun Facts
Source: https://asseteng.com.au/whats-difference-ton-tonne-one-heavier