What weight & mass units can I convert between?

The Weight & Mass converter supports 11 units, including Microgram, Milligram, Gram, Kilogram, and more.

Is the Weight & Mass converter free and accurate?

Yes — it's free with no limits, and uses standard conversion factors for weight & mass.

Does the converter store the values I enter?

No. Conversions run entirely in your browser — nothing you type is sent to a server or stored.

Weight & Mass Converter

Select the units you want to convert between and enter a value.

Weight & Mass

From

Worth Knowing

Strictly speaking, this converts mass, not weight — mass is the amount of matter and stays constant, while weight is the force gravity exerts on it and would differ on the Moon. In everyday use the two are treated interchangeably on Earth, so kilograms and pounds are used loosely for both. The most consequential conversion here is kilograms to pounds (multiply by about 2.205), the one that trips up recipes, luggage limits, and gym plates when people move between metric and imperial systems.

How to Use

Choose the unit you're converting from and the unit you want, from the two dropdowns above.
Type a value into the input field — the converted result updates instantly.
Swap the two units any time to flip the direction of the conversion.