Unit Convert API

POST https://api.findutils.com/api/tools/unit-convert/execute

Convert between length, weight, volume, area, speed, time, data size and temperature units (km/mi/m/ft, kg/lb, L/gal/m3, m²/ha/acre, mph/kph/knot, s/min/hr/day/year, KB/MB/GB, °C/°F/K).

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Request body

application/json

value

number required

Numeric value to convert.
from

string required

Source unit (e.g. "km", "lb", "C").
to

string required

Target unit.
category

string optional

length, weight, data, area, speed, volume, time or temperature. Detected from the units when omitted. One of length · weight · data · area · speed · volume · time · temperature.

Example arguments

Verified

{
  "value": 1,
  "from": "km",
  "to": "mi"
}

curl -X POST https://api.findutils.com/api/tools/unit-convert/execute \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "value": 1,
    "from": "km",
    "to": "mi"
  }'

const response = await fetch('https://api.findutils.com/api/tools/unit-convert/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json', Authorization: 'Bearer YOUR_API_KEY' },
  body: JSON.stringify({"value":1,"from":"km","to":"mi"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/unit-convert/execute",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"value":1,"from":"km","to":"mi"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/unit-convert/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json', 'Authorization: Bearer YOUR_API_KEY'],
    CURLOPT_POSTFIELDS => '{"value":1,"from":"km","to":"mi"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call unit_convert from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: API key
REST id: unit-convert
MCP name: unit_convert
Category: Date & time
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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