Is US GPM the same as Imperial GPM?

No. US and Imperial gallons have different volumes, so the flow rates differ.

Does flow rate require pipe diameter?

Not for unit conversion. Diameter is needed when relating volumetric flow to velocity.

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Flow Rate Converter

Convert volumetric flow rate units and clearly distinguish US GPM from Imperial GPM.

Flow Rate Converter interface

Volumetric flow rate value

Enter a signed or unsigned volumetric flow value. Negative values may represent direction.

Number format

Controls display only. Raw conversion values remain unrounded.

Negative volumetric flow can represent direction in a selected sign convention; physical flow magnitude is normally non-negative.

From unit

To unit

Flow-rate conversions are performed locally in your browser and are not submitted to a third-party calculation API.

Result section

okFixed decimal, 6 places

Primary converted value

1 L/min = 0.035315 ft^3/min

Cubic foot per minute from Liter per minute.

Secondary results

Original input: 1 L/min
Base-unit normalization: 0.000017 m^3/s
Conversion method: 1 L/min = 0.03531466672 ft^3/min

Unit conversion summary

1 L/min = 0.035315 ft^3/min

Reverse conversion: 0.035315 ft^3/min converts back to 1 L/min.

Assumptions

m^3/s is the internal base unit.
US gallon and Imperial gallon are separate units.

Calculation steps

Validate input and unitsLiter per minute to Cubic foot per minute
Normalize input to cubic metre per second0.000017 m^3/s
Convert base value to target unit0.035315 ft^3/min
Generate all-unit comparison tableEach row is converted from the same normalized base value.

Volumetric flow rate conversion

Q_{base}=Q_{input}\times F_{from};\quad Q_{output}=Q_{base}/F_{to}

Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

1 L/min x 0.00001666666667 m^3/s/L/min = 0.000017 m^3/s

0.000017 m^3/s / 0.0004719474432 m^3/s/ft^3/min = 0.035315 ft^3/min

All-unit comparison table

Every row is converted from the same normalized base value, not from a rounded display result.

Input flow rate converted to all supported units
Unit name	Symbol	Converted value	Group	Status
Cubic meter per second	m^3/s	0.000017 m^3/s	SI	comparison
Cubic meter per minute	m^3/min	0.001000 m^3/min	Metric	comparison
Cubic meter per hour	m^3/h	0.060000 m^3/h	Metric	comparison
Liter per second	L/s	0.016667 L/s	Metric	comparison
Liter per minute	L/min	1.000000 L/min	Metric	source
Liter per hour	L/h	60.000000 L/h	Metric	comparison
Milliliter per second	mL/s	16.666667 mL/s	Metric	comparison
Cubic centimeter per second	cm^3/s	16.666667 cm^3/s	Metric	comparison
Cubic foot per second	ft^3/s	0.000589 ft^3/s	US customary	comparison
Cubic foot per minute	ft^3/min	0.035315 ft^3/min	US customary	target
Cubic foot per hour	ft^3/h	2.118880 ft^3/h	US customary	comparison
US gallon per second	US gal/s	0.004403 US gal/s	US customary	comparison
US gallon per minute	US GPM	0.264172 US GPM	US customary	comparison
US gallon per hour	US gal/h	15.850323 US gal/h	US customary	comparison
Imperial gallon per minute	Imperial GPM	0.219969 Imperial GPM	Imperial	comparison

Technical visual

Volumetric flow is volume passing through a cross-section per unit time.

Engineering interpretation

Volumetric flow is volume per unit time.
Mass flow requires density; velocity requires cross-sectional area.

What is a flow rate converter?

Convert volumetric flow rate units for fluid systems, laboratory flow meters, HVAC, pumps, and CFD boundary data.

How to use the flow rate converter

Enter the volumetric flow rate value. Scientific notation such as 1e6 is supported.
Choose the source unit and target unit.
Select automatic, fixed-decimal, significant-figure, or scientific display formatting.
Review the primary result, base-unit normalization, formula substitution, and all-unit comparison table.
Copy the result, copy a share link with safe URL state, or print the calculation summary when needed.

Supported flow rate units

Supported units include m^3/s, m^3/min, m^3/h, L/s, L/min, L/h, mL/s, cm^3/s, ft^3/s, CFM, ft^3/h, US gal/s, US GPM, US gal/h, and Imperial GPM.

Flow Rate conversion formula

Volumetric flow rate normalizes to m^3/s. Pipe diameter is not needed for unit conversion.

Notation

Formula notation
Symbol	Meaning	Unit
x_input	Entered value	selected source unit
F_from	Source-unit factor or formula to base unit	base m^3/s
x_base	Normalized base-unit value	m^3/s
F_to	Target-unit factor or formula from base unit	base m^3/s
x_output	Converted output value	selected target unit

Worked examples

1 m^3/s to L/min

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: 1 m^3/s = 60,000.000000 L/min

1 ft^3/min to m^3/s

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: 1.00000e+0 ft^3/min = 4.71947e-4 m^3/s

-10 L/min to m^3/s

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: -1.00000e+1 L/min = -1.66667e-4 m^3/s

For engineering, simulation, and research work

The Flow Rate Converter normalizes to m^3/s and explains volumetric flow, mass flow, velocity, and signed flow conventions.

Common mistakes

Using ambiguous GPM without specifying US or Imperial gallons.
Confusing flow rate with velocity.
Treating volumetric flow as mass flow without density.

Limitations

This converter does not calculate velocity, Reynolds number, or pressure drop.
It does not infer pipe diameter or density.

Technical notes

Negative volumetric flow can represent direction in a selected sign convention; physical flow magnitude is normally non-negative.
This converter does not calculate velocity, Reynolds number, or pressure drop.
It does not infer pipe diameter or density.

References

NIST SP 811: NIST Special Publication 811, Guide for the Use of the International System of Units (SI).
BIPM SI Brochure: Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition.
ISO 80000: ISO 80000 quantities and units series.

Professional support from ScholarEase Consultancy Services LLP

Professional support is available for engineering calculations, CFD and FEA projects, data analysis, MATLAB/Python work, technical documentation, and research support. The converter remains free to use without purchasing services.

Visit ScholarEase

Engineering disclaimer

This tool is intended for educational, estimation, and preliminary engineering use. Always verify critical engineering calculations with applicable standards, validated software, and qualified professional judgment before using results in real design, manufacturing, construction, safety, or compliance decisions.

Need Professional Support?

ScholarTool is powered by ScholarEase Consultancy Services LLP. Professional engineering, simulation, research, and technical documentation support is available through the connected services website.

Visit ScholarEase

Last reviewed: 2026-06-19

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Flow Rate Converter interface

Volumetric flow rate value

Enter a signed or unsigned volumetric flow value. Negative values may represent direction.

Number format

Controls display only. Raw conversion values remain unrounded.

Negative volumetric flow can represent direction in a selected sign convention; physical flow magnitude is normally non-negative.

From unit

To unit

Flow-rate conversions are performed locally in your browser and are not submitted to a third-party calculation API.

Result section

okFixed decimal, 6 places

Primary converted value

1 L/min = 0.035315 ft^3/min

Cubic foot per minute from Liter per minute.

Secondary results

Original input: 1 L/min
Base-unit normalization: 0.000017 m^3/s
Conversion method: 1 L/min = 0.03531466672 ft^3/min

Unit conversion summary

1 L/min = 0.035315 ft^3/min

Reverse conversion: 0.035315 ft^3/min converts back to 1 L/min.

Assumptions

m^3/s is the internal base unit.
US gallon and Imperial gallon are separate units.

Calculation steps

Validate input and unitsLiter per minute to Cubic foot per minute
Normalize input to cubic metre per second0.000017 m^3/s
Convert base value to target unit0.035315 ft^3/min
Generate all-unit comparison tableEach row is converted from the same normalized base value.

Volumetric flow rate conversion

Q_{base}=Q_{input}\times F_{from};\quad Q_{output}=Q_{base}/F_{to}

Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

1 L/min x 0.00001666666667 m^3/s/L/min = 0.000017 m^3/s

0.000017 m^3/s / 0.0004719474432 m^3/s/ft^3/min = 0.035315 ft^3/min

All-unit comparison table

Every row is converted from the same normalized base value, not from a rounded display result.

Input flow rate converted to all supported units
Unit name	Symbol	Converted value	Group	Status
Cubic meter per second	m^3/s	0.000017 m^3/s	SI	comparison
Cubic meter per minute	m^3/min	0.001000 m^3/min	Metric	comparison
Cubic meter per hour	m^3/h	0.060000 m^3/h	Metric	comparison
Liter per second	L/s	0.016667 L/s	Metric	comparison
Liter per minute	L/min	1.000000 L/min	Metric	source
Liter per hour	L/h	60.000000 L/h	Metric	comparison
Milliliter per second	mL/s	16.666667 mL/s	Metric	comparison
Cubic centimeter per second	cm^3/s	16.666667 cm^3/s	Metric	comparison
Cubic foot per second	ft^3/s	0.000589 ft^3/s	US customary	comparison
Cubic foot per minute	ft^3/min	0.035315 ft^3/min	US customary	target
Cubic foot per hour	ft^3/h	2.118880 ft^3/h	US customary	comparison
US gallon per second	US gal/s	0.004403 US gal/s	US customary	comparison
US gallon per minute	US GPM	0.264172 US GPM	US customary	comparison
US gallon per hour	US gal/h	15.850323 US gal/h	US customary	comparison
Imperial gallon per minute	Imperial GPM	0.219969 Imperial GPM	Imperial	comparison

How to use the flow rate converter

Enter the volumetric flow rate value. Scientific notation such as 1e6 is supported.
Choose the source unit and target unit.
Select automatic, fixed-decimal, significant-figure, or scientific display formatting.
Review the primary result, base-unit normalization, formula substitution, and all-unit comparison table.
Copy the result, copy a share link with safe URL state, or print the calculation summary when needed.

Symbol

Meaning

Unit

x_input

Entered value

selected source unit

F_from

Source-unit factor or formula to base unit

base m^3/s

x_base

Normalized base-unit value

m^3/s

F_to

Target-unit factor or formula from base unit

base m^3/s

x_output

Converted output value

selected target unit

Worked examples

1 m^3/s to L/min

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: 1 m^3/s = 60,000.000000 L/min

1 ft^3/min to m^3/s

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: 1.00000e+0 ft^3/min = 4.71947e-4 m^3/s

-10 L/min to m^3/s

Method: Q_base = Q_input x factor_from; Q_output = Q_base / factor_to.

Result: -1.00000e+1 L/min = -1.66667e-4 m^3/s

Engineering disclaimer

Flow Rate Converter interface

Result section

Secondary results

Unit conversion summary

Assumptions

Calculation steps

Volumetric flow rate conversion

All-unit comparison table

Technical visual

Engineering interpretation

What is a flow rate converter?

How to use the flow rate converter

Supported flow rate units

Flow Rate conversion formula

Notation

Worked examples

1 m^3/s to L/min

1 ft^3/min to m^3/s

-10 L/min to m^3/s

For engineering, simulation, and research work

Common mistakes

Limitations

Technical notes

References

Professional support from ScholarEase Consultancy Services LLP

Related tools

Print summary

Engineering disclaimer

Need Professional Support?

Flow Rate Converter interface

Result section

Secondary results

Unit conversion summary

Assumptions

Calculation steps

Volumetric flow rate conversion

All-unit comparison table

Technical visual

Engineering interpretation

What is a flow rate converter?

How to use the flow rate converter

Supported flow rate units

Flow Rate conversion formula

Notation

Worked examples

1 m^3/s to L/min

1 ft^3/min to m^3/s

-10 L/min to m^3/s

For engineering, simulation, and research work

Common mistakes

Limitations

Technical notes

References

Professional support from ScholarEase Consultancy Services LLP

Related tools

Print summary

Engineering disclaimer

Need Professional Support?