Universal Flow Rate Converter – Any Pair of Units

Easily convert between all existing flow rate units with this online calculator. Switch seamlessly between cubic meters per second (m³/s), liters per second (L/s), gallons per minute (GPM), barrels per day (bbl/d), and more. All major metric and imperial units are supported, including standard flow rates for gases, water, oil.

How to Use the Flow Rate Converter

• Enter a value: Input the numerical flow rate value you want to convert.
• Select the input unit: Choose the unit corresponding to the value you entered.
• Select the output unit: Pick the desired unit to convert into.
• Automatic conversion: The tool instantly calculates the result and displays it.
• Adjust decimal places: Customize the number of decimal places for accuracy.
• Copy results: Use the copy button to quickly store the converted value.
• Reset the tool: Clear all fields and start a new conversion.

Flow Rate Unit Definitions

Flow rate quantifies the volume of fluid that moves through a given area over time. Below are the definitions of the supported units, including their symbols, measurement systems, and conversions.

Cubic Meter per Second (m³/s)

The SI base unit for flow rate, measuring the movement of one cubic meter of fluid per second. It is widely used in large-scale industrial, hydrological, and engineering applications. 1 m³/s = 1,000 L/s = 35.3147 ft³/s.

Cubic Meter per Minute (m³/min)

Represents the volume of fluid moving per minute, commonly used in ventilation, air conditioning, and industrial processes. 1 m³/min = 0.016667 m³/s = 1,000 L/min.

Cubic Meter per Hour (m³/h)

A frequently used unit in water supply, gas flow measurement, and environmental monitoring. 1 m³/h = 0.000277778 m³/s = 16.6667 L/min.

Cubic Meter per Day (m³/d)

Primarily used in water treatment, industrial processes, and large-scale consumption tracking. 1 m³/d = 1.15741 × 10⁻⁵ m³/s = 41.6667 L/h.

Liter per Second (L/s)

A metric unit for measuring flow rate in smaller-scale applications such as plumbing, firefighting, and irrigation. 1 L/s = 0.001 m³/s = 60 L/min.

Liter per Minute (L/min)

Commonly found in water flow measurement, beverage dispensing, and industrial processes. 1 L/min = 1.66667 × 10⁻⁵ m³/s = 0.06 L/s.

Liter per Hour (L/h)

Used in precise flow measurements such as irrigation, medical dosing, and laboratory testing. 1 L/h = 2.77778 × 10⁻⁷ m³/s = 0.016667 L/min.

Milliliter per Second (mL/s)

A fine-scale unit for fluid measurement, used in laboratories and pharmaceutical applications. 1 mL/s = 1 × 10⁻⁶ m³/s = 0.001 L/s.

Milliliter per Minute (mL/min)

Common in medical IV administration, chemical dosing, and microfluidic systems. 1 mL/min = 1.66667 × 10⁻⁸ m³/s = 0.001 mL/s.

Milliliter per Hour (mL/h)

Used in extremely precise flow measurements such as medical drips, controlled chemical reactions, and automated dispensing systems. 1 mL/h = 2.77778 × 10⁻¹⁰ m³/s = 0.016667 mL/min.

Cubic Foot per Second (ft³/s)

A US customary and Imperial unit used in hydrology, river flow measurements, and large-scale HVAC systems. 1 ft³/s = 0.0283168 m³/s = 448.831 L/min.

Cubic Foot per Minute (ft³/min)

Commonly used in air conditioning, industrial ventilation, and gas flow calculations. 1 ft³/min = 0.000471947 m³/s = 28.3168 L/min.

Cubic Foot per Hour (ft³/h)

A small-scale flow unit used in HVAC systems and fuel gas metering. 1 ft³/h = 7.86579 × 10⁻⁶ m³/s = 0.471947 L/h.

Cubic Inch per Second (in³/s)

Used in hydraulic and small mechanical fluid applications. 1 in³/s = 1.63871 × 10⁻⁵ m³/s = 16.3871 mL/s.

Cubic Inch per Minute (in³/min)

Found in mechanical engineering, fluid power calculations, and small-scale fuel delivery systems. 1 in³/min = 2.73118 × 10⁻⁷ m³/s = 16.3871 mL/min.

Cubic Inch per Hour (in³/h)

Used in precise engineering measurements, such as slow fluid flow in specialized machinery. 1 in³/h = 4.55196 × 10⁻⁹ m³/s = 16.3871 mL/h.

US Gallon per Second (gal/s)

A unit primarily used in the United States for measuring high-flow water distribution, firefighting, and industrial applications. 1 gal/s = 0.00378541 m³/s = 3.78541 L/s.

US Gallon per Minute (gal/min)

Common in plumbing, irrigation, and fuel flow measurement. 1 gal/min = 6.30902 × 10⁻⁵ m³/s = 3.78541 L/min.

US Gallon per Hour (gal/h)

Used in low-flow fuel consumption, HVAC systems, and water softeners. 1 gal/h = 1.0515 × 10⁻⁶ m³/s = 3.78541 L/h.

US Gallon per Day (gal/d)

Employed in long-term water usage tracking and water purification systems. 1 gal/d = 4.38126 × 10⁻⁸ m³/s = 3.78541 L/d.

Imperial Gallon per Second (gal/s)

A unit used in the UK for large-scale water flow applications. 1 gal_imp/s = 0.00454609 m³/s = 4.54609 L/s.

Imperial Gallon per Minute (gal/min)

Common in UK plumbing, fire suppression, and industrial water flow. 1 gal_imp/min = 7.57682 × 10⁻⁵ m³/s = 4.54609 L/min.

Imperial Gallon per Hour (gal/h)

Used in measuring fuel and water flow over longer periods. 1 gal_imp/h = 1.2628 × 10⁻⁶ m³/s = 4.54609 L/h.

Imperial Gallon per Day (gal/d)

Applied in municipal water tracking and consumption analysis. 1 gal_imp/d = 5.26168 × 10⁻⁸ m³/s = 4.54609 L/d.

Barrel per Second (bbl/s)

A unit for measuring oil and petroleum flow. 1 bbl/s = 0.158987 m³/s = 158.987 L/s.

Barrel per Minute (bbl/min)

Used in oil refineries and pipeline transport. 1 bbl/min = 0.00264979 m³/s = 158.987 L/min.

Barrel per Hour (bbl/h)

Common in crude oil production rates. 1 bbl/h = 4.41631 × 10⁻⁵ m³/s = 158.987 L/h.

Barrel per Day (bbl/d)

The standard measurement unit in the oil industry. 1 bbl/d = 1.84013 × 10⁻⁶ m³/s = 158.987 L/d.

Acre-Foot per Year (ac⋅ft/y)

A water resource management unit used to quantify large-scale water supply. 1 ac⋅ft/y = 3.91136 × 10⁻⁵ m³/s = 1,233.48 m³/y.

Acre-Foot per Day (ac⋅ft/d)

Used in reservoir outflow measurements. 1 ac⋅ft/d = 0.0142765 m³/s = 1,233.48 m³/d.

Acre-Foot per Hour (ac⋅ft/h)

Employed in large-scale irrigation and hydroelectric calculations. 1 ac⋅ft/h = 0.342635 m³/s = 1,233.48 m³/h.

Hundred Cubic Feet per Day (ccf/d)

A common unit in US water billing systems. 1 ccf/d = 3.27741 × 10⁻⁵ m³/s = 2.83168 m³/d.

Hundred Cubic Feet per Hour (ccf/h)

Used in gas and water flow metering. 1 ccf/h = 7.86579 × 10⁻⁴ m³/s = 2.83168 m³/h.

Hundred Cubic Feet per Minute (ccf/min)

Common in industrial HVAC and gas distribution. 1 ccf/min = 0.0471947 m³/s = 2.83168 m³/min.

Cubic Yard per Second (yd³/s)

Used in construction and mining. 1 yd³/s = 0.764555 m³/s = 764.555 L/s.

Cubic Yard per Minute (yd³/min)

Measures bulk material flow in industrial settings. 1 yd³/min = 0.0127426 m³/s = 764.555 L/min.

Cubic Centimeter per Second (cm³/s)

A precise unit used in laboratory applications. 1 cm³/s = 1 × 10⁻⁶ m³/s = 1 mL/s.

Cubic Centimeter per Minute (cm³/min)

Common in fluid mechanics and scientific measurements. 1 cm³/min = 1.66667 × 10⁻⁸ m³/s = 1 mL/min.

Cubic Centimeter per Hour (cm³/h)

Used in medical dosing and chemical reactions. 1 cm³/h = 2.77778 × 10⁻¹⁰ m³/s = 1 mL/h.

Cubic Centimeter per Day (cm³/d)

A micro-flow measurement unit. 1 cm³/d = 1.15741 × 10⁻¹¹ m³/s = 1 mL/d.

Kiloliter per Second (kL/s)

A large-scale metric unit used in municipal water supply. 1 kL/s = 1 m³/s = 1,000 L/s.

Kiloliter per Minute (kL/min)

Common in large-scale irrigation and industrial processes. 1 kL/min = 0.0166667 m³/s = 1,000 L/min.

Kiloliter per Hour (kL/h)

Used in water purification and bulk fluid transport. 1 kL/h = 0.000277778 m³/s = 1,000 L/h.

Kiloliter per Day (kL/d)

Measures daily water usage in municipal systems. 1 kL/d = 1.15741 × 10⁻⁵ m³/s = 1,000 L/d.

Megaliter per Second (ML/s)

A massive flow unit for large-scale hydrology and river discharge. 1 ML/s = 1,000 m³/s = 1,000,000 L/s.

Megaliter per Minute (ML/min)

Used in water management for large reservoirs. 1 ML/min = 16.6667 m³/s = 1,000,000 L/min.

Megaliter per Hour (ML/h)

Applied in wastewater treatment and hydroelectric projects. 1 ML/h = 0.277778 m³/s = 1,000,000 L/h.

Megaliter per Day (ML/d)

Standard in municipal water planning. 1 ML/d = 0.0115741 m³/s = 1,000,000 L/d.

Sverdrup (Sv)

Used in oceanography for large-scale current flow. 1 Sv = 1,000,000 m³/s.

Standard Cubic Centimeters per Minute (SCCM)

A gas flow measurement under standard conditions. 1 SCCM = 1.66667 × 10⁻⁸ m³/s.

Standard Cubic Feet per Minute (SCFM)

Used in gas industry and compressed air flow. 1 SCFM = 4.71947 × 10⁻⁴ m³/s.

Standard Cubic Feet per Hour (SCFH)

Common in gas supply systems. 1 SCFH = 1.311 × 10⁻⁵ m³/s.

Standard Liter per Minute (SLM)

Used in scientific gas flow applications. 1 SLM = 1.66667 × 10⁻⁵ m³/s.

Standard Liter per Second (SLS)

Applied in laboratory and industrial gas flow. 1 SLS = 0.001 m³/s.

Did we miss any units you need? Let us know in the comments below!

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