Convert kilometers per hour to miles per hour

Convert kilometers per hour to miles per hour instantly. Type a value below and the result updates as you go.

Convert

Value

From

Result

Use this tool from AI agents

This tool's engine is available to AI agents over MCP as convert_units. Add the Clean.tools server, then your agent can call it directly.

Claude Code

claude mcp add --transport http clean-tools https://mcp.clean.tools/mcp

Claude Desktop (mcpServers)

{"mcpServers":{"clean-tools":{"command":"npx","args":["-y","@clean-tools/mcp"]}}}

Cursor

https://mcp.clean.tools/mcp

Or call it over plain HTTP from any script. Same engine, JSON in and JSON out, no key:

curl

curl -s https://api.clean.tools/v1/convert_units \
  -H 'content-type: application/json' \
  -d '{"category":"length","value":10,"from":"km","to":"mile"}'

JavaScript

const res = await fetch('https://api.clean.tools/v1/convert_units', {
  method: 'POST',
  headers: { 'content-type': 'application/json' },
  body: JSON.stringify({ category: 'length', value: 10, from: 'km', to: 'mile' })
});
const data = await res.json();

OpenAPI spec npm: @clean-tools/mcp Full developer guide

Converting kilometers per hour to miles per hour

1 km/h equals 0.621371 mph, so 10 kilometers per hour is 6.213712 mph. The converter above is preset to kilometers per hour and miles per hour, so you can type any value and read the result instantly. Switch the category or units at any time to convert something else.

The conversion uses exact factors, and everything runs locally in your browser with no data sent to a server. No cost, no signup, no tracking.

Frequently asked questions

How many miles per hour are in a km/h?

0.621371 miles per hour. 1 km/h equals 0.621371 mph, so 10 kilometers per hour is 6.213712 mph.

Can I convert other units too?

Yes. The tool above handles length, weight, temperature, volume, data, speed, area, and time. Pick a different category or swap the from and to units to convert anything in those groups.

Can I use this from the command line or an AI agent?

Yes. The same converter is a REST endpoint at https://api.clean.tools/v1/convert_units, and it is an MCP server you can add to Claude, Claude Code, or Cursor. The @clean-tools/mcp npm package runs it as a local stdio server.

More conversions

View all tools

Use Clean.tools from your AI agent

This tool is also convert_units on the Clean.tools MCP server — the same engine, callable by your AI agent directly. No key, no signup: requests are processed in memory and request contents are never stored.