Mass Calculator
Convert between different units of mass including kilograms, grams, pounds, ounces, and more with our easy-to-use calculator.
Mass Conversion Calculator
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Mass Conversion Results
Frequently Asked Questions
Mass is the amount of matter in an object, measured in units like kilograms or pounds. Weight is the force exerted on an object by gravity and is measured in newtons. While mass remains constant regardless of location, weight can change depending on the gravitational field. For example, an object with a mass of 1 kg would weigh about 9.8 newtons on Earth but only about 1.6 newtons on the Moon.
The most common units of mass include kilograms (kg), grams (g), milligrams (mg), pounds (lb), ounces (oz), stones (st), tons, and metric tons. In the metric system, the base unit is the kilogram, with grams and milligrams being smaller units. In the imperial system, pounds and ounces are commonly used for smaller masses, while tons are used for larger masses.
To convert between different units of mass, you need to know the conversion factors between them. For example, 1 kilogram equals 1000 grams, 2.20462 pounds, or 35.274 ounces. Our mass calculator handles these conversions automatically, allowing you to easily convert between any of the supported units by simply entering the value and selecting the units you want to convert from and to.
A ton (short ton) is a unit of mass equal to 2,000 pounds or approximately 907.185 kilograms. A metric ton (tonne) is equal to 1,000 kilograms or approximately 2,204.62 pounds. The metric ton is part of the metric system and is used in most countries around the world, while the short ton is primarily used in the United States.
Different systems of measurement for mass developed historically in different regions of the world. The metric system, which uses kilograms and grams, was developed in France in the late 18th century and is now used globally for scientific and most everyday purposes. The imperial system, which uses pounds and ounces, developed in Britain and is still used in the United States and a few other countries for everyday measurements.