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
- Determine volume flow from area and speed of flow
- 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 speed of the flow in any units from the specified volumetric flow rate for a substance passing through a known cross-sectional area. For each calculated flow speed a conversion scale will be displayed with a range of values for flow versus speed for the same cross sectional area.

### Formula

The formula used by this calculator to calculate the flow velocity is:

v = Q / A

#### Symbols

- v = Flow velocity
- Q = Volumetric flow rate
- 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.

### Volumetric Flow Rate Measured

Enter the required amount of volume needed to flow pass per unit of time.

### Cross-Sectional Area

Enter the cross-sectional area perpendicular to the direction of flow of the substance through a pipe, duct or channel at the point of measurement.

### Flow Velocity Calculation

This is the speed of flow that will be produced by the specified volumetric flow rate and cross-sectional area