Weight Converter
Formula
Try other calculators
Meters, feet, miles and more.
Celsius, Fahrenheit, Kelvin and more.
Liters, gallons, cups and more.
How the weight converter works
Enter a weight, pick units — grams to tonnes, ounces to stone — and get the instant answer plus your value in all seven units. Swap flips the direction; decimals control the precision.
Handy equivalents
1 kg = 2.20462 lb, 1 lb = 453.6 g, 1 stone = 6.35 kg (UK body weight). A US ton (2,000 lb) differs from a metric tonne (1,000 kg) — watch which one a recipe or spec means.
Frequently asked questions
How many grams in a pound?
453.59237 g exactly. So 2 lb is about 907 g — just under a kilo.
What is a stone?
14 pounds (6.35 kg) — the UK's traditional unit for body weight. 10 stone ≈ 63.5 kg.
Kg or lbs — which should I use?
Science, medicine and most of the world: kg. US daily life: lbs. Our converter speaks both.
What's the difference between mass and weight?
Mass (kg) is how much stuff; weight is gravity's pull on it. On Earth we use them interchangeably — on the Moon you'd weigh 1/6th but your mass wouldn't change.