Instant Flow Rate Conversion for Engineering and HVAC

In fluid dynamics, engineering, and HVAC system design, the volumetric flow rate is a fundamental measurement. However, it's expressed in numerous units across different regions and industries. Our free Volumetric Flow Rate Converter is an essential tool designed to eliminate confusion and streamline your work. It allows for instant and precise conversions between common units like US Gallons per Minute (GPM), Cubic Feet per Minute (CFM), Liters per Second (L/s), and Cubic Meters per Hour (m³/h).

Whether you're sizing a pump, designing a ventilation system, or analyzing fluid flow in a pipe, this converter provides the accurate values you need. Avoid manual calculations and potential errors by using our reliable, easy-to-use tool for all your flow rate conversion needs.

How to Use the Flow Rate Converter

1. Enter Your Value: Type the numeric flow rate value you need to convert into the "From" field.
2. Select Units: Choose your starting unit (e.g., CFM) and your target unit (e.g., L/s) from the dropdown lists.
3. Convert: Click the "Convert Flow Rate" button to see the result calculated instantly.
4. Copy Result: Use the "Copy Result" button to quickly copy the converted value for your reports, spreadsheets, or design documents.

Frequently Asked Questions About Volumetric Flow Rate

How do you calculate volumetric flow rate?

The volumetric flow rate (Q) is calculated by multiplying the cross-sectional area of the flow (A) by the average velocity of the fluid (v). The formula is Q = A × v. For example, if water is flowing through a pipe with a cross-sectional area of 0.1 square meters at a velocity of 2 meters per second, the volumetric flow rate is 0.1 m² × 2 m/s = 0.2 m³/s.

How do you convert volumetric flow rate to mass flow rate?

To convert volumetric flow rate (Q) to mass flow rate (ṁ), you need to know the density (ρ) of the fluid. The formula is: Mass Flow Rate = Volumetric Flow Rate × Density (ṁ = Q × ρ). For instance, if the volumetric flow rate of water (density ≈ 1000 kg/m³) is 0.2 m³/s, the mass flow rate is 0.2 m³/s × 1000 kg/m³ = 200 kg/s.

What is the difference between mass flow and volumetric flow?

The key difference is what they measure. Volumetric flow rate measures the volume of fluid passing a point per unit of time (e.g., liters per second). It can be affected by changes in temperature and pressure. Mass flow rate measures the mass of fluid passing a point per unit of time (e.g., kilograms per second). It remains constant regardless of temperature or pressure changes.

What is the formula for volumetric flow rate conversion?

There isn't one single formula, but a set of specific conversion factors between units. For example, to convert US Gallons Per Minute (GPM) to Liters Per Second (L/s), you use the factor that 1 GPM ≈ 0.06309 L/s. Our converter handles all these factors automatically, so you just need to select the units and input the value.

What is the unit of volumetric flow rate?

The SI (International System of Units) unit for volumetric flow rate is cubic meters per second (m³/s). However, many other units are commonly used depending on the industry and region, including Gallons Per Minute (GPM), Cubic Feet Per Minute (CFM), Liters per Second (L/s), and Cubic Meters per Hour (m³/h).