RC time constant calculator API

Compute an RC circuit's time constant (τ = R·C), 99% settling time (5τ), and the charge/discharge percentage at an optional time t (Vc = V·(1−e^(−t/τ)). Answers 'what is the RC time constant of 1kΩ and 1µF','how long to settle','what percent charged at t'.

Price$0.01per request

MethodPOST

Route/v1/calc/eng-rc-time-constant

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcengineeringelectricalrctime-constantcapacitorfiltertransient

API URLhttps://x402.hexl.dev/v1/calc/eng-rc-time-constant

Integration docs

Example request

{
  "resistanceOhm": 1000,
  "capacitanceF": 0.000001,
  "timeS": 0.001
}

Example response

{
  "resistanceOhm": 1000,
  "capacitanceF": 0.000001,
  "timeConstantS": 0.001,
  "timeConstantMs": 1,
  "settle99PctS": 0.005,
  "formula": "tau = R * C; Vc(t) = V * (1 - e^(-t/tau))",
  "timeS": 0.001,
  "chargedPercent": 63.2121,
  "dischargedPercent": 36.7879
}

Input schema

{
  "type": "object",
  "required": [
    "resistanceOhm",
    "capacitanceF"
  ],
  "properties": {
    "resistanceOhm": {
      "type": "number",
      "description": "ohms (Ω)",
      "examples": [
        1000
      ]
    },
    "capacitanceF": {
      "type": "number",
      "description": "farads (F)",
      "examples": [
        0.000001
      ]
    },
    "timeS": {
      "type": "number",
      "description": "optional elapsed time (s)",
      "examples": [
        0.001
      ]
    }
  }
}

Output schema

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