Weight Converter
Convert between kilograms, grams, pounds, ounces, stone, and tonnes.
About this tool
Weight conversion between metric and imperial units comes up constantly: recipes written abroad, shipping costs, body weight discussed across countries, and luggage allowances. This converter covers the seven units in everyday use, including stone, which remains standard for body weight in the United Kingdom and Ireland.
All conversions use the exact international definition of the pound as 0.45359237 kilograms, fixed by agreement in 1959. The stone is exactly 14 pounds and the ounce exactly one sixteenth of a pound, so every result here is exact rather than approximate.
Frequently asked questions
What is the quick kg to lb approximation?
Multiply kilograms by 2.2. The exact factor is 2.20462, so the shortcut is accurate to within a quarter percent.
Is a tonne the same as a US ton?
No. The metric tonne is 1000 kg, about 2205 lb. The US short ton is 2000 lb, about 907 kg.