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.