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 area from volume flow and flow speed
- Calculate flow velocity from a given volume flow rate and area
- Calculate cross-sectional area of circular pipe or duct
- Calculate cross-sectional area of rectangular shaped duct
- Area units converter
- Convert volume and time to flow rate
- Volumetric flow rate units converter
- Volumetric units converter

## User Guide

This tool will calculate the volumetric flow rate in any units from the specified velocity of a substance flowing through a defined cross-sectional area. For each new calculation a unique conversion scale will be generated for the range of flow velocities and volumetric flow rates with the cross sectional area specified.

### Formula

The volumetric flow rate formula used by this calculator is:

Q = v · A

#### Symbols

- Q = Volume flow rate
- v = Flow velocity
- A = Cross-sectional area

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

### Flow Velocity Measured

Enter the speed at which the substance is moving.

### Cross-Sectional Area

Enter the size of the area perpendicular to the direction of flow.

### Volumetric Flow Rate Calculation

This is the amount of volume that will flow pass per unit of time.