Weight Converter
Convert between milligrams, grams, kilograms, metric tonnes, ounces, pounds, stone, US and UK tons. All conversions update live. Last updated: June 2026.
Popular Weight Conversions
Click any card to load it into the converter above.
Weight Conversion Reference
Kilograms and grams are metric (SI) units. Pounds, ounces, and stone are imperial or US customary units. The metric tonne (1,000 kg) differs from the US short ton (2,000 lbs) and the UK long ton (2,240 lbs). If you want more context on when to use each unit system, the full guide to using unit converters walks through it.
Frequently Asked Questions
How many pounds in a kilogram?
1 kilogram = 2.20462 pounds. To convert kg to pounds, multiply by 2.20462. To convert pounds to kg, multiply by 0.453592 (or divide by 2.20462). A quick approximation: 1 kg is roughly 2.2 lbs.
How many grams in an ounce?
1 ounce (avoirdupois) = 28.3495 grams. There are 16 ounces in a pound and 1 pound = 453.592 grams. Note: troy ounces used for precious metals are slightly heavier at 31.1035 grams.
What is my weight in kg if I weigh 150 lbs?
150 lbs ÷ 2.20462 = 68.04 kg. To convert any weight from lbs to kg, divide by 2.20462, or multiply by 0.453592. For a rough estimate, divide your lb value by 2.2.
How many kg in a stone?
1 stone = 14 pounds = 6.35029 kg. Stone is a unit of weight used primarily in the UK and Ireland for measuring body weight. 10 stone = 140 lbs = 63.5 kg.
What is a metric tonne?
1 metric tonne = 1,000 kg = 2,204.62 lbs. This differs from the US short ton (2,000 lbs = 907.18 kg) and the UK long ton (2,240 lbs = 1,016.05 kg). The metric tonne is the standard unit of mass for large quantities in most countries.