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Units and Conversions – Physical Unit Converter
x402
Units and Conversions – Physical Unit Converter is a paid API for AI agents from units-convert.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Converts a numeric value from one physical unit to another across length, mass, volume, area, speed, pressure, energy, power, time, and temperature.
Price / call$0.02
Success—
StatusUnknown
How this service works
Convert a value between units of length, mass, volume, area, speed, pressure, energy, power, time or temperature, exactly.
Output
Returns the converted numeric result along with a rounded version, the source and target unit labels, the measurement category (e.g. length, temperature), a human-readable summary, and optional disclaimer or degraded-quality flags.
Example use cases
Recipe unit conversion for cooking
“I have a recipe that calls for 2.5 cups of flour but my scale only does grams — can you convert 2.5 cups to grams? Wait, actually just convert 500 ml to fluid ounces for the liquid part.”
Travel speed limit translation
“The speed limit on the highway here is 130 km/h — what is that in mph?”
Engineering pressure unit conversion
“I need to convert 14.7 psi to bar for a spec sheet I'm filling out — what's the exact value?”
Technical details
Endpoint
GEThttps://units-convert.x402tookit.com/unit-convert?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need exact, deterministic physical unit conversions across standard measurement categories (length, mass, volume, area, speed, pressure, energy, power, time, temperature). Prefer it over general-purpose LLM math when precision and structured output (rounded result, category label, summary) are required. Not suited for cooking-specific measures (use the cooking converter sibling), data sizes, fuel economy, or Roman numeral conversions — those have dedicated sibling endpoints.
Side effects
- Incompatible units (e.g. converting length to mass) returns an error or null result
- Unrecognized unit abbreviation causes a failed lookup
- Missing required query parameters (value, from, to) results in a 400-level error
- Payment not attached or insufficient USDC balance causes a 402 payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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