# Unit Converter (`mangudai/unit-converter`) Actor

Convert any value between units of length, weight, temperature, volume, area, speed, time, data, pressure, energy, power, angle, and frequency. Give a value and a unit, get the result in one unit or every unit in that category. No API key, pure offline, always reliable.

- **URL**: https://apify.com/mangudai/unit-converter.md
- **Developed by:** [Mangudäi](https://apify.com/mangudai) (community)
- **Categories:** Developer tools, Automation, Open source
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $0.01 / 1,000 results

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event

## What's an Apify Actor?

Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js/docs.md):

```bash
npm install apify-client
```

In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.md):

```bash
pip install apify-client
```

In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md):

````bash
# MacOS / Linux
curl -fsSL https://apify.com/install-cli.sh | bash
# Windows
irm https://apify.com/install-cli.ps1 | iex
```bash

In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/integrations/mcp.md).

If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).


# README

## Unit Converter

Convert any number between units of measurement without an API key. Give a value and a source unit, and get the result in a single target unit or in every unit of the same category. Everything runs offline from exact conversion factors, so there is nothing to rate limit and nothing to break.

### What it does

Send one or more conversion requests. For each one you provide a value and a `from` unit. Add a `to` unit to convert to that single unit. Leave `to` empty and the actor converts to every unit in the matching category. Units are auto-detected, so you never pick a category by hand.

Supported categories and a sample of their units:

- length: meter, kilometer, centimeter, millimeter, mile, yard, foot, inch, nautical mile
- weight and mass: kilogram, gram, milligram, metric ton, pound, ounce, stone, US ton, long ton
- temperature: Celsius, Fahrenheit, Kelvin, Rankine
- volume: liter, milliliter, cubic meter, US gallon, quart, pint, cup, fluid ounce, tablespoon, teaspoon, imperial gallon
- area: square meter, square kilometer, hectare, acre, square mile, square foot, square inch, square yard
- speed: meter per second, kilometer per hour, mile per hour, foot per second, knot
- time: second, millisecond, minute, hour, day, week, month, year
- digital storage: byte, bit, kilobyte, megabyte, gigabyte, terabyte, petabyte, plus binary kibibyte to tebibyte
- pressure: pascal, kilopascal, bar, psi, atmosphere, mmHg, torr
- energy: joule, kilojoule, calorie, kilocalorie, watt hour, kilowatt hour, BTU, foot pound
- power: watt, kilowatt, megawatt, horsepower, metric horsepower
- angle: degree, radian, gradian, arcminute, arcsecond, turn
- frequency: hertz, kilohertz, megahertz, gigahertz, rpm

### Input

- `conversions`: a list of objects. Each needs `value` (a number) and `from` (a unit). Optional `to` picks a single target unit; omit it to get the whole category.
- `precision`: decimal places to round to, 0 to 15. Default 6.

Units accept short symbols or full names. `km`, `kilometer`, `kilometre`, and `kilometers` all resolve to the same unit. Temperature accepts `C`, `F`, `K`, `celsius`, `fahrenheit`, and similar.

Example input:

```json
{
  "conversions": [
    { "value": 100, "from": "km", "to": "mi" },
    { "value": 72, "from": "F" },
    { "value": 5, "from": "kg", "to": "lb" },
    { "value": 1, "from": "GB", "to": "MB" }
  ],
  "precision": 6
}
````

### Output

One row per target unit. Each row has:

- `inputValue`: the value you sent
- `fromUnit`, `fromUnitName`: source unit symbol and full name
- `category`: the detected category, for example length or temperature
- `toUnit`, `toUnitName`: target unit symbol and full name
- `result`: the converted number, rounded to your precision
- `formatted`: a ready-to-read string like `100 km = 62.137119 mi`
- `error`: null on success, or a short message for an unknown unit or a cross-category request

Results export to JSON, CSV, or Excel from the dataset.

### Why it stays reliable

There is no third-party API, no key, and no login. Conversions come from fixed, standardized factors held in the code, so the same input always gives the same answer.

# Actor input Schema

## `conversions` (type: `array`):

List of conversions to run. Each item needs a numeric 'value' and a 'from' unit. Add a 'to' unit to convert to that single unit, or leave 'to' empty to convert to every unit in the same category. Units accept short symbols (km, lb, F) or full names (kilometer, pound, fahrenheit).

## `precision` (type: `integer`):

Number of decimal places to round results to (0 to 15).

## Actor input object example

```json
{
  "conversions": [
    {
      "value": 100,
      "from": "km",
      "to": "mi"
    },
    {
      "value": 72,
      "from": "F"
    },
    {
      "value": 5,
      "from": "kg",
      "to": "lb"
    },
    {
      "value": 1,
      "from": "GB",
      "to": "MB"
    }
  ],
  "precision": 6
}
```

# Actor output Schema

## `conversions` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "conversions": [
        {
            "value": 100,
            "from": "km",
            "to": "mi"
        },
        {
            "value": 72,
            "from": "F"
        },
        {
            "value": 5,
            "from": "kg",
            "to": "lb"
        },
        {
            "value": 1,
            "from": "GB",
            "to": "MB"
        }
    ],
    "precision": 6
};

// Run the Actor and wait for it to finish
const run = await client.actor("mangudai/unit-converter").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = {
    "conversions": [
        {
            "value": 100,
            "from": "km",
            "to": "mi",
        },
        {
            "value": 72,
            "from": "F",
        },
        {
            "value": 5,
            "from": "kg",
            "to": "lb",
        },
        {
            "value": 1,
            "from": "GB",
            "to": "MB",
        },
    ],
    "precision": 6,
}

# Run the Actor and wait for it to finish
run = client.actor("mangudai/unit-converter").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"])
for item in client.dataset(run["defaultDatasetId"]).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "conversions": [
    {
      "value": 100,
      "from": "km",
      "to": "mi"
    },
    {
      "value": 72,
      "from": "F"
    },
    {
      "value": 5,
      "from": "kg",
      "to": "lb"
    },
    {
      "value": 1,
      "from": "GB",
      "to": "MB"
    }
  ],
  "precision": 6
}' |
apify call mangudai/unit-converter --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com/?tools=mangudai/unit-converter",
                "--header",
                "Authorization: Bearer <YOUR_API_TOKEN>"
            ]
        }
    }
}

```

## OpenAPI specification

```json
{
    "openapi": "3.0.1",
    "info": {
        "title": "Unit Converter",
        "description": "Convert any value between units of length, weight, temperature, volume, area, speed, time, data, pressure, energy, power, angle, and frequency. Give a value and a unit, get the result in one unit or every unit in that category. No API key, pure offline, always reliable.",
        "version": "0.0",
        "x-build-id": "wdCkdVOxrNRg6Oajo"
    },
    "servers": [
        {
            "url": "https://api.apify.com/v2"
        }
    ],
    "paths": {
        "/acts/mangudai~unit-converter/run-sync-get-dataset-items": {
            "post": {
                "operationId": "run-sync-get-dataset-items-mangudai-unit-converter",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        },
        "/acts/mangudai~unit-converter/runs": {
            "post": {
                "operationId": "runs-sync-mangudai-unit-converter",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor and returns information about the initiated run in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/runsResponseSchema"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/acts/mangudai~unit-converter/run-sync": {
            "post": {
                "operationId": "run-sync-mangudai-unit-converter",
                "x-openai-isConsequential": false,
                "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.",
                "tags": [
                    "Run Actor"
                ],
                "requestBody": {
                    "required": true,
                    "content": {
                        "application/json": {
                            "schema": {
                                "$ref": "#/components/schemas/inputSchema"
                            }
                        }
                    }
                },
                "parameters": [
                    {
                        "name": "token",
                        "in": "query",
                        "required": true,
                        "schema": {
                            "type": "string"
                        },
                        "description": "Enter your Apify token here"
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK"
                    }
                }
            }
        }
    },
    "components": {
        "schemas": {
            "inputSchema": {
                "type": "object",
                "required": [
                    "conversions"
                ],
                "properties": {
                    "conversions": {
                        "title": "Conversions",
                        "type": "array",
                        "description": "List of conversions to run. Each item needs a numeric 'value' and a 'from' unit. Add a 'to' unit to convert to that single unit, or leave 'to' empty to convert to every unit in the same category. Units accept short symbols (km, lb, F) or full names (kilometer, pound, fahrenheit)."
                    },
                    "precision": {
                        "title": "Decimal precision",
                        "minimum": 0,
                        "maximum": 15,
                        "type": "integer",
                        "description": "Number of decimal places to round results to (0 to 15).",
                        "default": 6
                    }
                }
            },
            "runsResponseSchema": {
                "type": "object",
                "properties": {
                    "data": {
                        "type": "object",
                        "properties": {
                            "id": {
                                "type": "string"
                            },
                            "actId": {
                                "type": "string"
                            },
                            "userId": {
                                "type": "string"
                            },
                            "startedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "finishedAt": {
                                "type": "string",
                                "format": "date-time",
                                "example": "2025-01-08T00:00:00.000Z"
                            },
                            "status": {
                                "type": "string",
                                "example": "READY"
                            },
                            "meta": {
                                "type": "object",
                                "properties": {
                                    "origin": {
                                        "type": "string",
                                        "example": "API"
                                    },
                                    "userAgent": {
                                        "type": "string"
                                    }
                                }
                            },
                            "stats": {
                                "type": "object",
                                "properties": {
                                    "inputBodyLen": {
                                        "type": "integer",
                                        "example": 2000
                                    },
                                    "rebootCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "restartCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "resurrectCount": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "computeUnits": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "options": {
                                "type": "object",
                                "properties": {
                                    "build": {
                                        "type": "string",
                                        "example": "latest"
                                    },
                                    "timeoutSecs": {
                                        "type": "integer",
                                        "example": 300
                                    },
                                    "memoryMbytes": {
                                        "type": "integer",
                                        "example": 1024
                                    },
                                    "diskMbytes": {
                                        "type": "integer",
                                        "example": 2048
                                    }
                                }
                            },
                            "buildId": {
                                "type": "string"
                            },
                            "defaultKeyValueStoreId": {
                                "type": "string"
                            },
                            "defaultDatasetId": {
                                "type": "string"
                            },
                            "defaultRequestQueueId": {
                                "type": "string"
                            },
                            "buildNumber": {
                                "type": "string",
                                "example": "1.0.0"
                            },
                            "containerUrl": {
                                "type": "string"
                            },
                            "usage": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "integer",
                                        "example": 1
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            },
                            "usageTotalUsd": {
                                "type": "number",
                                "example": 0.00005
                            },
                            "usageUsd": {
                                "type": "object",
                                "properties": {
                                    "ACTOR_COMPUTE_UNITS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATASET_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "KEY_VALUE_STORE_WRITES": {
                                        "type": "number",
                                        "example": 0.00005
                                    },
                                    "KEY_VALUE_STORE_LISTS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_READS": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "REQUEST_QUEUE_WRITES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_INTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "DATA_TRANSFER_EXTERNAL_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                                        "type": "integer",
                                        "example": 0
                                    },
                                    "PROXY_SERPS": {
                                        "type": "integer",
                                        "example": 0
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
```