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 volumetric flow rate from flow velocity and pipe diameter
- Calculate flow speed from volumetric flow rate and pipe diameter
- 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 internal diameter of a round pipe or duct that a substance is flowing through, from the rate of volumetric flow and the speed of the flow. A range of conversion values for flow and diameter will also be displayed for each set of input parameters entered.
Formula
The formula used by this calculator to calculate the internal pipe or duct diameter is:
ø = (Q / (v · π))½ · 2
Derived from:
A = Q / v
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.
Volumetric Flow Rate Required
Enter the volumetric quantity which will flow through per unit of time.
Flow Velocity Measured
Enter the speed that the substance is moving through the pipe or duct.
Diameter Calculation
This is the internal diameter of a pipe or duct that would be required for a substance moving at the specified speed and volumetric flow rate.