---
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: 1503
product: Flux
version: v0
publisher: InfluxData
canonical: https://docs.influxdata.com/flux/v0/stdlib/universe/tofloat/
date: '2024-04-08T16:01:02-06:00'
lastmod: '2024-04-08T16:01:02-06:00'
---

* Flux 0.7.0+

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/)
| _time | _value | *tag |
| --- | --- | --- |
| _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 |
| --- | --- | --- |
| _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 |

| _time | _value | *tag |
| --- | --- | --- |
| _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 |
| --- | --- | --- |
| _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 |

| _time | *tag | _value |
| --- | --- | --- |
| _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 |
| --- | --- | --- |
| _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 |

| _time | *tag | _value |
| --- | --- | --- |
| _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 |
| --- | --- | --- |
| _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 |