Length compare

length-compare · version 1.0.0 · Units & sizes · free, no key needed

Compare two integer length measurements by exact nanometer amounts.

Use when you need to: length compare · compare length measurements · compare two integer lengths.

Decide before calling

Read the versioned contract and the supported scope below. Reuse length-compare@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use length-compare@1.0.0 for length compare. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• length compare
• compare length measurements
• compare two integer lengths

Not supported

• sort a list of lengths
• approximate comparison
• nautical miles
• floating-point lengths

Behavior

• left and right are objects with a canonical integer value and a length unit.
• Units are exactly nm, um, mm, cm, m, km, in, ft, yd, mi using the LENGTH_NM table.
• Each side is converted to nanometers as a BigInt and those amounts are compared.
• cmp is the JSON integer -1, 0, or 1 according as left is less than, equal to, or greater than right.
• Negative values are allowed; input -0 is canonicalized to 0.

Input

• left (object, required)
• right (object, required)

Output

• cmp (one of -1, 0, 1, required)

Limits

• max digits: 1000
• units: ["nm","um","mm","cm","m","km","in","ft","yd","mi"]

Example

Request input:

{
  "left": {
    "value": "1",
    "unit": "m"
  },
  "right": {
    "value": "1",
    "unit": "yd"
  }
}

Response:

{
  "result": {
    "cmp": 1
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "length-compare",
  "version": "1.0.0",
  "input": {
    "left": {
      "value": "1",
      "unit": "m"
    },
    "right": {
      "value": "1",
      "unit": "yd"
    }
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/length-compare/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"left":{"value":"1","unit":"m"},"right":{"value":"1","unit":"yd"}}'

The machine-readable contract is at /v1/tools/length-compare/versions/1.0.0.

CLI

node cli.mjs run length-compare 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Length add: Add integer length terms in mixed units and return the exact sum in a chosen unit.
• Length convert: Convert a canonical integer length between exact SI and international customary units.
• Byte size compare: Compare two non-negative integer byte sizes by exact byte amounts.
• Css length convert: Convert px, pt, pc, in, cm, mm, or Q using exact CSS ratios; returns a rounded decimal value.
• Css px to rem: Convert px to rem or em with a supplied root or parent font size; returns an exactly rounded relative length.
• Css rem to px: Convert rem or em to px using a supplied root or parent font size; returns an exactly rounded pixel length.