# Mass

> [DataType](https://schema.org.ai/DataType) > [Quantity](https://schema.org.ai/Quantity) > [Mass](https://schema.org.ai/Mass)

Properties that take Mass as values are of the form '<Number> <Mass unit of measure>'. E.g., '7 kg'.

**Extends:** [Quantity](https://schema.org.ai/Quantity)

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Quoted from Schema.org 30.1, https://schema.org/Mass, under CC BY-SA 3.0. Served by the Org.AI Foundation at https://schema.org.ai/Mass.