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Flow Velocity & Pipe Diameter to Volumetric Flow Rate Calculator

Volume Flow Rate Factors
Flow Velocity (v) [?]
per (/)
Diameter (ø) [?]
Calculate Volumetric Flow Rate
Volume Flow (Q) [?]
per (/)
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Contents

  • Related Tools
  • User Guide
    • Formula
      • Symbols
    • Flow Velocity Measured
    • Diameter
    • Volumetric Flow Rate Calculation

Related Tools

Find another flow measurement calculator by clicking on the required answer which coincides with the input parameters you already know.

vol flow mass flow flow speed vol mass time
area flow speed vol flow
dia flow speed vol flow
w x h flow speed vol flow
time vol mass vol flow mass flow
vol time density vol flow
mass time density mass flow
density mass flow vol flow mass vol
flow speed area, dia
  • Calculate flow speed from volumetric flow rate and pipe diameter
  • Calculate duct diameter from flow velocity and volume flow rate
  • Calculate mass flow rate from volumetric flow rate and density
  • Convert volumetric flow rates to other units
  • Convert diameter into to other units
  • Convert flow speed to other units

User Guide

This tool will calculate the volumetric flow rate in any units from the specified velocity of a substance flowing through a round duct or pipe of a chosen diameter. For each new calculation a unique conversion scale will be generated for the range of flow speeds and volumetric flow rates for the diameter specified.

Formula

The volumetric flow rate formulae used by this calculator is:

Q = v · π · (ø / 2)²

Derived from:

Q = v · A

A = π · r²

r = ø / 2

Symbols

  • Q = Volume flow rate
  • v = Flow velocity
  • A = Cross-sectional area
  • r = Radius
  • ø = Diameter

n.b. This formula assumes uniform flow conditions within the entire cross-sectional area of pipe, without any friction losses near to surfaces.

Flow Velocity Measured

Enter the speed at which the substance is moving.

Diameter

Enter the inside diameter of the circular pipe or duct.

Volumetric Flow Rate Calculation

This is the volumetric amount of substance that will flow pass in a unit of time.

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Product Selection Guides

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Help Guides

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