---
title: toFloat() function
description: toFloat() converts all values in the _value column to float types.
url: https://docs.influxdata.com/flux/v0/stdlib/universe/tofloat/
estimated_tokens: 2045
product: Flux
version: v0
---

# toFloat() function

-   Flux 0.7.0+
-   View InfluxDB support

`toFloat()` converts all values in the `_value` column to float types.

#### Supported data types

-   string (numeric, scientific notation, ±Inf, or NaN)
-   boolean
-   int
-   uint

##### Function type signature

```js
(<-tables: stream[{A with _value: B}]) => stream[{A with _value: B, _value: float}]
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### tables

Input data. Default is piped-forward data (`<-`).

## Examples

-   [Convert an integer \_value column to floats](#convert-an-integer-_value-column-to-floats)
-   [Convert a boolean \_value column to floats](#convert-a-boolean-_value-column-to-floats)

### Convert an integer \_value column to floats

```js
import "sampledata"

sampledata.int()
    |> toFloat()
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |

#### Output data

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |

### Convert a boolean \_value column to floats

```js
import "sampledata"

sampledata.bool()
    |> toFloat()
```

[](#view-example-input-and-output)

View example input and output

#### Input data

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t1 | true |
| 2021-01-01T00:00:10Z | t1 | true |
| 2021-01-01T00:00:20Z | t1 | false |
| 2021-01-01T00:00:30Z | t1 | true |
| 2021-01-01T00:00:40Z | t1 | false |
| 2021-01-01T00:00:50Z | t1 | false |

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t2 | false |
| 2021-01-01T00:00:10Z | t2 | true |
| 2021-01-01T00:00:20Z | t2 | false |
| 2021-01-01T00:00:30Z | t2 | true |
| 2021-01-01T00:00:40Z | t2 | true |
| 2021-01-01T00:00:50Z | t2 | false |

#### Output data

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t1 | 1 |
| 2021-01-01T00:00:10Z | t1 | 1 |
| 2021-01-01T00:00:20Z | t1 | 0 |
| 2021-01-01T00:00:30Z | t1 | 1 |
| 2021-01-01T00:00:40Z | t1 | 0 |
| 2021-01-01T00:00:50Z | t1 | 0 |

| _time | *tag | _value |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | t2 | 0 |
| 2021-01-01T00:00:10Z | t2 | 1 |
| 2021-01-01T00:00:20Z | t2 | 0 |
| 2021-01-01T00:00:30Z | t2 | 1 |
| 2021-01-01T00:00:40Z | t2 | 1 |
| 2021-01-01T00:00:50Z | t2 | 0 |

#### Related

-   [Work with floats](/flux/v0/data-types/basic/float/)
-   [float() function](/flux/v0/stdlib/universe/float/)

[transformations](/flux/v0/tags/transformations/) [type-conversions](/flux/v0/tags/type-conversions/)