---
title: toFloat() function
description: >
  `toFloat()` converts all values in the `_value` column to float types.
menu:
  flux_v0_ref:
    name: toFloat
    parent: universe
    identifier: universe/toFloat
weight: 101
flux/v0/tags: [transformations, type-conversions]
introduced: 0.7.0
---

<!------------------------------------------------------------------------------

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To make updates to this documentation, update the function comments above the
function definition in the Flux source code:

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Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md

------------------------------------------------------------------------------->

`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}]
```

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

## 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()

```

{{< expand-wrapper >}}
{{% expand "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   |

{{% /expand %}}
{{< /expand-wrapper >}}

### Convert a boolean _value column to floats

```js
import "sampledata"

sampledata.bool()
    |> toFloat()

```

{{< expand-wrapper >}}
{{% expand "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       |

{{% /expand %}}
{{< /expand-wrapper >}}