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Electrical Calculators – Wire Resistance
x402
Electrical Calculators – Wire Resistance is a paid API for AI agents from electrical-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02).
Calculates wire resistance using R = ρL/A for copper or aluminium at a given temperature, or corrects a known resistance to a new temperature.
Price / call$0.02
Success—
StatusUnknown
How this service works
Wire resistance R = rho L / A for copper or aluminium at a temperature, or correct a known resistance to a new temperature.
Output
Returns computed resistance in ohms for the specified geometry and temperature, plus supporting values: conductor cross-section in mm², resistivity at 20°C, temperature coefficient (alpha), a human-readable summary, and a disclaimer. For temperature-correction mode, returns the corrected resistance and the temperatures used.
Example use cases
Cable sizing for residential wiring
“Calculate the resistance of 30 metres of 2.5mm² copper wire at 25°C — I need to check if voltage drop will be acceptable for a 20A circuit.”
Temperature correction for field measurement
“I measured a copper conductor at 0.45 ohms at 15°C. What will its resistance be at 75°C? The material is copper.”
Aluminium feeder resistance check
“What's the total resistance of 150 metres of aluminium wire in AWG 2/0 at 60°C? I'm sizing a feeder run for a subpanel.”
Technical details
Endpoint
GEThttps://electrical-calc.x402tookit.com/wire-resistance?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a precise, physics-based wire resistance calculation (R = ρL/A) for copper or aluminium, with correct temperature adjustment via the standard alpha coefficient formula. Prefer it over voltage-drop endpoints when you need the raw resistance value rather than voltage drop, and over general-purpose calculators when you need material-specific resistivity constants and temperature correction in one call.
Side effects
- Missing required 'material' parameter returns validation error
- Providing neither 'awg' nor 'sizeMm2' causes missing-geometry error
- Invalid AWG string (e.g. non-standard gauge) may return an error or null area
- Providing only geometry fields without length returns partial result (no total resistance)
- Extreme temperatures outside physical model range may yield unreliable results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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