The metric ton or tonne (t) equals 1,000 kilograms and is used for measuring heavy cargo, industrial output, and vehicle weights worldwide. Shipping containers, steel production, and greenhouse gas emissions are all commonly reported in tonnes. One tonne equals approximately 2,204.6 pounds or about 1.1023 short tons.

The stone (st) is a British imperial unit equal to 14 pounds or about 6.35 kilograms, traditionally used in the United Kingdom and Ireland for body weight. When someone in the UK says they weigh 11 stone, they mean 154 pounds, a convention that persists in everyday conversation and medical records. One stone equals exactly 6.35029 kilograms.