mathjs/docs/reference/functions/to.md

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

# Function to

Change the unit of a value.

For matrices, the function is evaluated element wise.


## Syntax

```js
math.to(x, unit)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | Unit | Array | Matrix | The unit to be converted.
`unit` | Unit | Array | Matrix | New unit. Can be a string like "cm" or a unit without value.

### Returns

Type | Description
---- | -----------
Unit | Array | Matrix | value with changed, fixed unit.


## Examples

```js
math.to(math.unit('2 inch'), 'cm');                   // returns Unit 5.08 cm
math.to(math.unit('2 inch'), math.unit(null, 'cm'));  // returns Unit 5.08 cm
math.to(math.unit(16, 'bytes'), 'bits');              // returns Unit 128 bits
```


## See also

[unit](unit.md)


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