Resistor power dissipation API

Compute resistor power dissipation (P = I²·R = V²/R) from resistance plus current or voltage, and recommend a standard wattage rating with 2x derating. Answers 'how much power does a 100Ω resistor dissipate at 0.5A','what wattage resistor do I need','will this resistor overheat'.

Price$0.01per request

MethodPOST

Route/v1/calc/eng-resistor-power

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcengineeringelectricalresistorpowerdissipationwattagederating

API URLhttps://x402.hexl.dev/v1/calc/eng-resistor-power

Integration docs

Example request

{
  "resistance": 100,
  "current": 0.5
}

Example response

{
  "resistanceOhm": 100,
  "currentA": 0.5,
  "voltageV": 50,
  "powerW": 25,
  "recommendedRatingW": null,
  "derating": "rating >= 2x dissipation",
  "formula": "P = I^2 * R = V^2 / R"
}

Input schema

{
  "type": "object",
  "required": [
    "resistance"
  ],
  "properties": {
    "resistance": {
      "type": "number",
      "description": "ohms (Ω)",
      "examples": [
        100
      ]
    },
    "current": {
      "type": "number",
      "description": "amperes (A)",
      "examples": [
        0.5
      ]
    },
    "voltage": {
      "type": "number",
      "description": "volts (V)",
      "examples": [
        50
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}