# Quantity

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

Quantities such as distance, time, mass, weight, etc. Particular instances of say Mass are strings like '3 kg' or '4 milligrams'.

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

## Subtypes

| Type | Description |
|------|-------------|
| [Distance](https://schema.org.ai/Distance) | Properties that take Distances as values are of the form '<Number> <Length unit of measure>'. E.g., '7 ft'. |
| [Duration](https://schema.org.ai/Duration) | Quantity: Duration (use [ISO 8601 duration format](http://en.wikipedia.org/wiki/ISO_8601)). |
| [Energy](https://schema.org.ai/Energy) | Properties that take Energy as values are of the form '<Number> <Energy unit of measure>'. |
| [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'. |

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