APIs › Business & Financial Calculators › Unit Converter

Unit Converter

Converts across length, mass, volume, area, temperature, pressure, energy, power, speed, time and data units with exact factors.

POST /v1/business/unit-convert $0.003 per call

Specification

Endpoint

POST /v1/business/unit-convert

Price

$0.003 per call · tier micro_data

Payment

x402 on X Layer (chain 196) · settled in USDG or USDT0 · schemes exact, aggr_deferred

Data source

Deterministic decimal arithmetic on caller-supplied input

Timeout

15 seconds

Max request

256 KB

Version

1.0.0

Calling it

The first call returns a 402 with the payment challenge. Retry with a signed authorisation in the X-PAYMENT header — see the payment guide for the exact shape.

curl -i -X POST "https://api.dana-edu.pp.ua/v1/business/unit-convert" \
  -H "content-type: application/json" \
  -d '{ ... }'

Response

Real output, captured by running this endpoint at build time — not written by hand. Volatile fields such as timestamps are elided. Captured 2026-07-30.

{
  "input": {
    "value": "5000",
    "unit": "bbl_oil"
  },
  "output": {
    "value": "794.93647464",
    "unit": "m3"
  },
  "dimension": "volume",
  "base_unit": "m3",
  "base_unit_value": "794.93647464",
  "factor_used": "0.158987294928",
  "exact": true
}

Every response is wrapped in the same envelope: data plus warnings, sources, confidence, informational_only and a measured processing_ms. See the envelope reference.

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