Weight & Mass Converter
Convert between grams, kilograms, ounces, pounds, stones and more — instantly.
Convert weight and mass units
This weight converter switches instantly between metric units (milligrams, grams, kilograms, tonnes) and imperial units (ounces, pounds, stones, US tons). It is useful for cooking, shipping, fitness, science, and everyday conversions between systems. Enter a value, pick your units, and the result updates as you type.
Common weight conversions
| From | To | Result |
|---|---|---|
| 1 kilogram | pounds | 2.205 lb |
| 1 pound | grams | 453.6 g |
| 1 ounce | grams | 28.35 g |
| 1 stone | kilograms | 6.350 kg |
| 1 tonne | kilograms | 1,000 kg |
Weight vs mass
In everyday use, “weight” and “mass” are used interchangeably, and that is how this converter treats them. Strictly, mass is the amount of matter in an object (measured in kilograms) while weight is the force gravity exerts on that mass. For all practical conversions on Earth, the values are equivalent.
Frequently asked questions
How many pounds are in a kilogram?
One kilogram equals about 2.205 pounds. To go the other way, multiply pounds by 0.4536 to get kilograms.
How many grams are in an ounce?
One ounce is 28.35 grams. A pound contains 16 ounces, or about 453.6 grams.