Pipe flow rate calculator API

Compute volumetric flow rate through a circular pipe (Q = A·v, A = π·(d/2)²) in m³/s, L/s, and m³/h. Answers 'flow rate in a 0.1m pipe at 2 m/s','how many litres per second','m³/h through this pipe'.

Price$0.01per request

MethodPOST

Route/v1/calc/eng-flow-rate

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcengineeringfluidsflow-ratepipecontinuityhydraulicsvolumetric

API URLhttps://x402.hexl.dev/v1/calc/eng-flow-rate

Integration docs

Example request

{
  "diameterM": 0.1,
  "velocityMs": 2
}

Example response

{
  "diameterM": 0.1,
  "velocityMs": 2,
  "areaM2": 0.007854,
  "flowRateM3s": 0.015708,
  "flowRateLs": 15.707963,
  "flowRateM3h": 56.548668,
  "formula": "Q = A * v, A = π*(d/2)^2"
}

Input schema

{
  "type": "object",
  "required": [
    "diameterM",
    "velocityMs"
  ],
  "properties": {
    "diameterM": {
      "type": "number",
      "description": "pipe inner diameter (m)",
      "examples": [
        0.1
      ]
    },
    "velocityMs": {
      "type": "number",
      "description": "flow velocity (m/s)",
      "examples": [
        2
      ]
    }
  }
}

Output schema

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