Flow Rate Converter

Convert between different flow rate units including liters per second, cubic meters per hour, gallons per minute, cubic feet per minute, and more. Perfect for HVAC, plumbing, chemical engineering, and irrigation applications.

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Common Conversions
Quick access to frequently used conversions
Unit Information

Metric Units

International System of Units (SI) measurements

m³/s
metric
Cubic Meters per Second
Base unit of flow rate in the SI system
L/s
metric
Liters per Second
Common flow rate unit, 1 L/s = 0.001 m³/s
m³/h
metric
Cubic Meters per Hour
Flow rate unit for larger systems
L/min
metric
Liters per Minute
Flow rate unit for medium flows
mL/s
metric
Milliliters per Second
Small flow rate unit for laboratory use
m³/day
metric
Cubic Meters per Day
Daily flow rate unit for water treatment
L/day
metric
Liters per Day
Very slow flow rate unit

Imperial Units

Traditional British and American measurements

gal/min
imperial
Gallons per Minute
Common flow rate unit in the United States
cfm
imperial
Cubic Feet per Minute
Air flow rate unit, used in HVAC systems
gph
imperial
Gallons per Hour
Slow flow rate unit for irrigation
ft³/s
imperial
Cubic Feet per Second
High flow rate unit for rivers and large systems
yd³/h
imperial
Cubic Yards per Hour
Large volume flow rate unit

Scientific Units

Scientific and technical measurements

acre-ft/day
scientific
Acre-Feet per Day
Large scale water management unit
bbl/day
scientific
Barrels per Day
Oil and gas industry flow rate unit
Preferences

Common Use Cases

  • HVAC Systems: Air flow rates, duct sizing, ventilation
  • Plumbing: Water flow, pipe sizing, fixture design
  • Chemical Engineering: Process flow rates, reactor design
  • Irrigation: Water distribution, sprinkler systems
  • Environmental: River flow, wastewater treatment

Popular Conversions

0.5 L/s7.93 gal/min
100 cfm169.9 m³/h
2.5 gal/min0.158 L/s
50 m³/h29.4 cfm

How Our Flow Rate Converter Works

1️⃣

Enter Flow Rate Value

Input any flow rate value in the "From" field. Our converter accepts decimal numbers and scientific notation.

2️⃣

Select Units

Choose your source unit (e.g., L/s) and target unit (e.g., gal/min) from our comprehensive unit selection.

3️⃣

Get Instant Result

View the converted flow rate in real-time. Copy results, explore common conversions, or check conversion history.

Understanding Flow Rate Units

Metric Units (SI)

m³/s (Cubic Meters per Second)
Base unit in the SI system. 1 m³/s = 1000 L/s
L/s (Liters per Second)
Common flow rate unit for medium flows.

Imperial Units

gal/min (Gallons per Minute)
Standard flow rate unit in the United States.
cfm (Cubic Feet per Minute)
Air flow rate unit, used in HVAC systems.

Engineering Units

acre-ft/day
Large scale water management unit.
bbl/day (Barrels per Day)
Oil and gas industry flow rate unit.

Frequently Asked Questions

How accurate is this flow rate converter?

Our flow rate converter uses precise conversion factors and maintains accuracy up to 8 decimal places. All conversions are based on internationally recognized standards.

Can I convert negative flow rates?

Yes, our converter supports negative values for applications like relative flow rates, reverse flow measurements, or scientific calculations.

What is the highest flow rate I can convert?

Our converter can handle flow rates from -1 trillion to 1 quadrillion units, covering everything from laboratory micro-flows to industrial mega-flows.

How do I use scientific notation?

Enable "Show scientific notation" in preferences for very large or small values. You can also input values like 1e6 for 1,000,000.

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