Pipe Pressure Drop Calculator

curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pipe-pressure-drop-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputMode": "flow",
  "flowRate": "100",
  "flowUnit": "lpm",
  "pipeDiameter": "50",
  "diameterUnit": "mm",
  "pipeLength": "100",
  "lengthUnit": "m",
  "material": "steel",
  "fluid": "water20"
}
'

{
  "tool": "pipe-pressure-drop-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "status": "100 L/min through a 50 mm commercial steel (new) pipe, 100 m long, drops 17,605 Pa (17.61 kPa, 0.1761 bar, 2.553 psi) — head loss 1.798 m (5.901 ft). Re = 42,280 (turbulent flow), f = 0.02448.",
    "result": [
      {
        "property": "Velocity",
        "value": "0.8488 m/s"
      },
      {
        "property": "Reynolds number",
        "value": "42,280"
      },
      {
        "property": "Flow regime",
        "value": "Turbulent"
      },
      {
        "property": "Relative roughness (ε/D)",
        "value": "0.0009"
      },
      {
        "property": "Friction factor (f)",
        "value": "0.02448"
      },
      {
        "property": "Pressure drop",
        "value": "17,605 Pa (17.61 kPa, 0.1761 bar, 2.553 psi)"
      },
      {
        "property": "Head loss",
        "value": "1.798 m (5.901 ft)"
      },
      {
        "property": "Formula",
        "value": "ΔP = f(L/D)(ρV²/2) = 0.02448 × (100/0.05) × (998.2 × 0.8488² / 2)"
      }
    ],
    "materialTable": [
      {
        "material": "PVC / plastic (smooth)",
        "roughness-mm": "0.0015",
        "roughness-in": "0.000059",
        "this-pipe": ""
      },
      {
        "material": "Copper / brass",
        "roughness-mm": "0.0015",
        "roughness-in": "0.000059",
        "this-pipe": ""
      },
      {
        "material": "Commercial steel (new)",
        "roughness-mm": "0.045",
        "roughness-in": "0.001772",
        "this-pipe": "◄ Selected"
      },
      {
        "material": "Galvanized steel",
        "roughness-mm": "0.15",
        "roughness-in": "0.005906",
        "this-pipe": ""
      },
      {
        "material": "Cast iron",
        "roughness-mm": "0.26",
        "roughness-in": "0.010236",
        "this-pipe": ""
      },
      {
        "material": "Concrete",
        "roughness-mm": "1",
        "roughness-in": "0.03937",
        "this-pipe": ""
      },
      {
        "material": "Riveted steel",
        "roughness-mm": "3",
        "roughness-in": "0.11811",
        "this-pipe": ""
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}

POST

tool

pipe-pressure-drop-calculator

curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pipe-pressure-drop-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputMode": "flow",
  "flowRate": "100",
  "flowUnit": "lpm",
  "pipeDiameter": "50",
  "diameterUnit": "mm",
  "pipeLength": "100",
  "lengthUnit": "m",
  "material": "steel",
  "fluid": "water20"
}
'

{
  "tool": "pipe-pressure-drop-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "status": "100 L/min through a 50 mm commercial steel (new) pipe, 100 m long, drops 17,605 Pa (17.61 kPa, 0.1761 bar, 2.553 psi) — head loss 1.798 m (5.901 ft). Re = 42,280 (turbulent flow), f = 0.02448.",
    "result": [
      {
        "property": "Velocity",
        "value": "0.8488 m/s"
      },
      {
        "property": "Reynolds number",
        "value": "42,280"
      },
      {
        "property": "Flow regime",
        "value": "Turbulent"
      },
      {
        "property": "Relative roughness (ε/D)",
        "value": "0.0009"
      },
      {
        "property": "Friction factor (f)",
        "value": "0.02448"
      },
      {
        "property": "Pressure drop",
        "value": "17,605 Pa (17.61 kPa, 0.1761 bar, 2.553 psi)"
      },
      {
        "property": "Head loss",
        "value": "1.798 m (5.901 ft)"
      },
      {
        "property": "Formula",
        "value": "ΔP = f(L/D)(ρV²/2) = 0.02448 × (100/0.05) × (998.2 × 0.8488² / 2)"
      }
    ],
    "materialTable": [
      {
        "material": "PVC / plastic (smooth)",
        "roughness-mm": "0.0015",
        "roughness-in": "0.000059",
        "this-pipe": ""
      },
      {
        "material": "Copper / brass",
        "roughness-mm": "0.0015",
        "roughness-in": "0.000059",
        "this-pipe": ""
      },
      {
        "material": "Commercial steel (new)",
        "roughness-mm": "0.045",
        "roughness-in": "0.001772",
        "this-pipe": "◄ Selected"
      },
      {
        "material": "Galvanized steel",
        "roughness-mm": "0.15",
        "roughness-in": "0.005906",
        "this-pipe": ""
      },
      {
        "material": "Cast iron",
        "roughness-mm": "0.26",
        "roughness-in": "0.010236",
        "this-pipe": ""
      },
      {
        "material": "Concrete",
        "roughness-mm": "1",
        "roughness-in": "0.03937",
        "this-pipe": ""
      },
      {
        "material": "Riveted steel",
        "roughness-mm": "3",
        "roughness-in": "0.11811",
        "this-pipe": ""
      }
    ]
  },
  "credits_used": 5,
  "credits_remaining": null
}

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json

pipeDiameter

number

required

Inside Diameter

Required range: x >= 0

pipeLength

number

required

Pipe Run Length

Required range: x >= 0

inputMode

enum<string>

Known Quantity

Available options:

flow,

velocity

flowRate

number

Volumetric Flow Rate

Required range: x >= 0

flowUnit

enum<string>

Flow Unit

Available options:

lpm,

lps,

m3h,

m3s,

gpm,

cfm

velocity

number

Mean Velocity

Required range: x >= 0

velocityUnit

enum<string>

Velocity Unit

Available options:

mps,

fps

diameterUnit

enum<string>

Diameter Unit

Available options:

mm,

in,

m,

ft

lengthUnit

enum<string>

Length Unit

Available options:

m,

ft,

km,

mi

material

enum<string>

Pipe Material

Available options:

pvc,

copper,

steel,

galvanized,

castiron,

concrete,

riveted,

custom

roughness

number

Absolute Roughness (mm)

Required range: x >= 0

fluid

enum<string>

Fluid

Available options:

water20,

water60,

seawater20,

air20,

ethanol20,

sae30,

glycerin20,

custom

density

number

Density (kg/m³)

Required range: x >= 0

viscosity

number

Viscosity

Required range: x >= 0

viscosityUnit

enum<string>

Viscosity Unit

Available options:

cp,

pas,

cst

Response

Tool output

outputs

object

required

Show child attributes

tool

string

required

The tool's slug, echoing the {slug} in the request path.

tool_version

string

required

Output-contract version for this tool.

credits_used

integer

required

Credits this call consumed, after any settlement refund. 0 when metering is disabled.

credits_remaining

integer | null

required

Credits left in the current monthly allowance, or null when metering is disabled.

request_id

string

Correlation id, also sent as x-request-id.

Overview

Catalog

Account

Tools

Pipe Pressure Drop Calculator

Authorizations

Body

Response