Flow Converter
Convert volumetric flow rate between liters/second, gallons/minute, cubic meters/hour, CFM, and more. Used in HVAC, plumbing, hydraulics, and chemical processing. See also our Mass Flow Rate Converter and Molar Flow Rate Converter.
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Popular Flow Converters:
What is a Flow Converter?
A flow rate converter is a tool that converts between units of volumetric flow such as liters per second, gallons per minute (GPM), cubic meters per hour, and cubic feet per minute (CFM). It is essential for HVAC design, plumbing, hydraulic engineering, and water treatment.
How to Convert Flow Units
Select the flow rate unit you want to convert from and the target unit using the dropdown menus. Enter your value in the input field and the converter instantly calculates the equivalent flow rate. Use popular links for common conversions like L/s to GPM.
Flow Conversion Formulas
History of Flow Measurement
Flow measurement dates back to ancient civilizations that built aqueducts and irrigation systems. Modern flow measurement began with the Venturi meter in the 18th century. The cubic meter per second is the SI unit, while GPM dominates American plumbing and CFM is standard for HVAC airflow.
About This Flow Converter
This flow converter supports 15 units including liter/second, liter/minute, cubic meter/second, cubic meter/hour, cubic foot/minute (CFM), cubic foot/second, gallon (US)/minute (GPM), gallon/hour, and milliliter/second. It covers both SI and US customary flow units.
Frequently Asked Questions
How do I convert liters per second to GPM?
Multiply the L/s value by 15.8503 to get gallons per minute. For example, 2 L/s × 15.8503 = 31.7 GPM.
What is CFM and what is it used for?
CFM stands for cubic feet per minute. It is the standard unit for measuring airflow in HVAC systems, ventilation fans, and air compressors in the United States.
How do I convert cubic meters per hour to liters per second?
Divide the m³/h value by 3.6 to get L/s. For example, 36 m³/h ÷ 3.6 = 10 L/s.
What is the difference between flow rate and velocity?
Flow rate is the volume of fluid passing a point per unit time (e.g., L/s). Velocity is the speed of the fluid (e.g., m/s). Flow rate = velocity × cross-sectional area of the pipe.
How do I convert GPM to cubic meters per hour?
Multiply the GPM value by 0.2271 to get m³/h. For example, 100 GPM × 0.2271 = 22.71 m³/h.
Metric Conversion Factor Tables for Flow Converter
| Units to convert | Multiply By The Number | Convert as Unit |
|---|---|---|
| Liter/second (L/s) | 60 | Liter/minute (L/min) |
| Liter/minute (L/min) | 0.0166667 | Liter/second (L/s) |
| Liter/second (L/s) | 15.850323 | Gallon (US)/minute (gpm) |
| Gallon (US)/minute (gpm) | 0.0630902 | Liter/second (L/s) |
| Cubic meter/second (m³/s) | 1000 | Liter/second (L/s) |
| Cubic foot/minute (cfm) | 0.471947 | Liter/second (L/s) |
| Cubic meter/hour (m³/h) | 0.277778 | Liter/second (L/s) |
Flowconverters & it's abbreviations
| Unit | Abbreviation | Unit | Abbreviation | Unit | Abbreviation |
|---|---|---|---|---|---|
| cubic meter/second | m³/s | cubic meter/minute | m³/min | cubic meter/hour | m³/h |
| liter/second | L/s | liter/minute | L/min | liter/hour | L/h |
| cubic foot/second | ft³/s | cubic foot/minute | ft³/min | cubic foot/hour | ft³/h |
| gallon (US)/second | gal/s | gallon (US)/minute | gpm | gallon (US)/hour | gal/h |
| gallon (US)/day | gal/day | cubic centimeter/second | cm³/s | milliliter/second | mL/s |
Complete list of Flow conversion units and its conversion.
- 1 liter/second = 60 liter/minute
L/s to L/min → - 1 liter/minute = 0.0166667 liter/second
L/min to L/s → - 1 liter/second = 15.850323 gallon (US)/minute
L/s to gpm →
- 1 cubic meter/hour = 4.40287 gallon (US)/minute
m³/h to gpm → - 1 cubic foot/second = 448.831 gallon (US)/minute
cfs to gpm →
- 1 gallon (US)/minute = 0.0630902 liter/second
gpm to L/s → - 1 cubic meter/second = 1000 liter/second
m³/s to L/s → - 1 cubic foot/minute = 0.471947 liter/second
cfm to L/s →