Weight and Mass Converter

Weight is a measure of the force exerted on an object by gravity, while mass is a measure of the amount of matter in an object. In everyday use, the terms are often used interchangeably, but they are technically different. The SI unit for mass is the kilogram (kg).

The most common units of weight and mass are the kilogram (kg), gram (g), milligram (mg), metric ton (t), pound (lb), ounce (oz), and stone (st). The metric system is used worldwide, while the imperial system is primarily used in the United States.