Flow Velocity & Area to Flow Rate Calculator

Volume Flow Rate Factors
Flow Velocity (v) [?]
nanometres (nm) micrometres (µm) thousands of an inch (thou) millimetres (mm) centimetres (cm) inches (in) feet (ft) yards (yd) metres (m) kilometres (km) miles (mi) nautical miles (nmi)
per (/)
nanosecond (ns) microsecond (µs) millisecond (ms) second (s) minute (min) hour (hr) day (d) week (wk) month (mo) year (yr)
Flow Area (A) [?]
Select area unit sq nanometres (nm²) sq micrometres (µm²) sq thous (thou²) sq millimetres (mm²) sq centimetres (cm²) sq inches (in²) sq feet (ft²) sq yards (yd²) sq metres (m²) acres (ac) hectares (ha) sq kilometres (km²) sq miles (mi²) sq nautical miles (nmi²)
Calculate Volumetric Flow Rate
Volume Flow (Q) [?]
cu nanometres (nm³) cu micrometres (µm³) cu thous (thou³) cu millimetres (mm³) cu centimetres (cc, cm³) millilitres (mL) teaspoons (tsp, usa) teaspoons (tsp, metric) tablespoons (Tbsp, usa) tablespoons (Tbsp, metric) cu inches (in³) fluid ounces (fl oz, imp) fluid ounces (fl oz, usa) cups (usa) cups (metric) pints (pt, usa liq) pints (pt, imp) litres (L) gallons (gal, usa liq) gallons (gal, imp) cu feet (ft³) barrels (bbl, oil) cu yards (yd³) cu metres (m³) kilolitres (kL) megalitres (ML) cu kilometres (km³) cu miles (mi³) cu nautical miles (nmi³)
per (/)
nanosecond (ns) microsecond (µs) millisecond (ms) second (s) minute (min) hour (hr) day (d) week (wk) month (mo) year (yr)

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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 area from volume flow and flow speed
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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.