> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Units

## Using Units

Add units to a block input by typing in the unit abbreviation after the input value. This tells the input what unit you want and sets the input to that unit.

* Some units auto-populate when certain inputs are tied together. For example, In min and In max in the **Ramp** block always have the same units. Adding a unit for one input automatically sets the units for the other.
* Blocks only accept units that fit with their Output Types.

## Converting Units

Inputs auto-convert units when you type in a different unit of the same type.

**For example:** Type '5 m' into a Size input. The result converts the meters to millimeters, but shows 5 m in the input.

## Writing Units

* Use '^' to denote units with a superscript.
  * **For example:** mm^2 means mm<sup>2</sup>
* Use \* for multiplying units.
* Use / for dividing units.

## Accepted Base Units

Below is a list of accepted units for:

* <a href="#Length">Length</a>
* <a href="#Mass">Mass</a>
* <a href="#Time">Time</a>
* <a href="#Angle">Angle</a>
* <a href="#Temperature">Temperature</a>
* <a href="#Complex Units">Complex Units</a>

#### Length

| Name        | Abbreviation | Unit System    |
| ----------- | ------------ | -------------- |
| Micrometers | um           | SI             |
| Millimeters | mm           | SI             |
| Centimeters | cm           | SI             |
| Meters      | m            | SI             |
| Kilometers  | km           | SI             |
| Inches      | in           | U.S. Customary |
| Feet        | ft           | U.S. Customary |
| Yards       | yd           | U.S. Customary |
| Miles       | mi           | U.S. Customary |

#### Mass

| Name       | Abbreviation | Unit System    |
| ---------- | ------------ | -------------- |
| Grams      | g            | SI             |
| Kilograms  | kg           | SI             |
| Ounces     | oz           | U.S. Customary |
| Pounds     | lbm          | U.S. Customary |
| Metric Ton | tonne        | Metric         |
| Ton        | ton          | U.S. Customary |

#### Time

| Name         | Abbreviation | Unit System |
| ------------ | ------------ | ----------- |
| Milliseconds | ms           | -           |
| Seconds      | s            | SI          |
| Minutes      | min          | -           |
| Hours        | hr           | -           |

#### Angle

| Name    | Abbreviation | Unit System |
| ------- | ------------ | ----------- |
| Degrees | deg          | -           |
| Radians | rad          | SI          |

#### Temperature

Read more on using temperature units [here](https://support.ntopology.com/hc/en-us/articles/360060934274).

| Name            | Abbreviation | Unit System    |
| --------------- | ------------ | -------------- |
| Delta Farenheit | dF           | U.S. Customary |
| Delta Celcius   | dC           | SI             |
| Farenheit       | F            | U.S. Customary |
| Celcius         | C            | SI             |
| Kelvin          | K            | SI             |

#### Complex Units

| Name                      | Abbreviation | Unit System    |
| ------------------------- | ------------ | -------------- |
| Newton                    | N            | Metric         |
| Kilonewton                | kN           | Metric         |
| Pound Force               | lbf          | U.S. Customary |
| Pascal                    | Pa           | Metric         |
| Megapascal                | MPA          | Metric         |
| Gigapascal                | GPa          | Metric         |
| Pound Per Square Inch     | psi          | U.S. Customary |
| Kilopound Per Square Inch | ksi          | U.S. Customary |
| Hertz                     | Hz           | SI             |
| British Thermal Unit      | BTU          | U.S. Customary |
| Watt                      | W            | SI             |
| Kilowatt                  | kW           | SI             |
| Megawatt                  | MW           | SI             |
| Joule                     | J            | SI             |