Pressure unit convert

pressure-unit-convert · version 1.0.0 · Units & sizes · free, no key needed

Convert exact decimal pressure values among seven units and return a reduced exact fraction.

Use when you need to: convert pressure units exactly · convert pascals to psi · convert kilopascals to bar.

Decide before calling

Read the versioned contract and the supported scope below. Reuse pressure-unit-convert@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 pressure-unit-convert@1.0.0 for convert pressure units exactly. 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

• convert pressure units exactly
• convert pascals to psi
• convert kilopascals to bar
• convert atmospheres to torr
• convert torr to millimetres of mercury
• exact pressure conversion
• pressure unit fraction conversion

Not supported

• convert temperature or mass units
• look up measured atmospheric pressure

Behavior

• Accepts only canonical ASCII decimal strings and the seven declared unit names.
• Uses declared exact rational pascal factors; returns a reduced fraction and a finite canonical decimal when one exists, otherwise numerator/denominator.
• No rounding occurs; negative zero canonicalizes to zero.

Input

• value (string, required): min length 1; max length 100; pattern ^-?(?:0|[1-9][0-9]*)(?:\.[0-9]+)?$
• from_unit (one of "pascal", "kilopascal", "bar", "atmosphere", "torr", "psi", "millimetre_of_mercury", required)
• to_unit (one of "pascal", "kilopascal", "bar", "atmosphere", "torr", "psi", "millimetre_of_mercury", required)

Output

• value (string, required): min length 1
• numerator (string, required): pattern ^-?(?:0|[1-9][0-9]*)$
• denominator (string, required): pattern ^[1-9][0-9]*$
• from_unit (one of "pascal", "kilopascal", "bar", "atmosphere", "torr", "psi", "millimetre_of_mercury", required)
• to_unit (one of "pascal", "kilopascal", "bar", "atmosphere", "torr", "psi", "millimetre_of_mercury", required)

Limits

• max input bytes: 256
• max value bytes: 100
• max fraction digits: 98
• max output bytes: 512

Example

Request input:

{
  "value": "1",
  "from_unit": "atmosphere",
  "to_unit": "pascal"
}

Response:

{
  "result": {
    "value": "101325",
    "numerator": "101325",
    "denominator": "1",
    "from_unit": "atmosphere",
    "to_unit": "pascal"
  }
}

How to call it

MCP

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

{
  "id": "pressure-unit-convert",
  "version": "1.0.0",
  "input": {
    "value": "1",
    "from_unit": "atmosphere",
    "to_unit": "pascal"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/pressure-unit-convert/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"value":"1","from_unit":"atmosphere","to_unit":"pascal"}'

The machine-readable contract is at /v1/tools/pressure-unit-convert/versions/1.0.0.

CLI

node cli.mjs run pressure-unit-convert 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

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