Fluid velocity calculator API

Compute fluid velocity in a circular pipe from volumetric flow rate and diameter (v = Q/A, A = π·(d/2)²). Answers 'velocity for 0.0157 m³/s in a 0.1m pipe','how fast is the flow','velocity from flow rate and pipe size'.

Price$0.01per request

MethodPOST

Route/v1/calc/eng-fluid-velocity

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcengineeringfluidsvelocitypipeflowhydraulicscontinuity

API URLhttps://x402.hexl.dev/v1/calc/eng-fluid-velocity

Integration docs

Example request

{
  "flowRateM3s": 0.015708,
  "diameterM": 0.1
}

Example response

{
  "flowRateM3s": 0.015708,
  "diameterM": 0.1,
  "areaM2": 0.007854,
  "velocityMs": 1.999999,
  "formula": "v = Q / A, A = π*(d/2)^2"
}

Input schema

{
  "type": "object",
  "required": [
    "flowRateM3s",
    "diameterM"
  ],
  "properties": {
    "flowRateM3s": {
      "type": "number",
      "description": "volumetric flow (m³/s)",
      "examples": [
        0.015708
      ]
    },
    "diameterM": {
      "type": "number",
      "description": "pipe inner diameter (m)",
      "examples": [
        0.1
      ]
    }
  }
}

Output schema

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