Flow Rate Converter

Convert L/min, m³/h, GPM, CFM and more.

1 GPM=3.7854118 L/min
1 GPM = 3.7854118 L/min 1 L/min = 0.26417205 GPM

All conversions

0.063090196
Liter per second L/s
3.7854118
Liter per minute L/min
227.12471
Liter per hour L/h
3,785.4118
Milliliter per minute mL/min
0.000063090196
Cubic meter per second m³/s
0.0037854118
Cubic meter per minute m³/min
0.22712471
Cubic meter per hour m³/h
1
US gallon per minute GPM
60
US gallon per hour GPH
0.83267418
Imperial gallon per minute imp GPM
0.0022280093
Cubic foot per second ft³/s
0.13368056
Cubic foot per minute CFM

Common flow rate conversions

GPM to L/min
GPML/min
13.7854118
518.927059
1037.854118
2594.635295
50189.27059
100378.54118
10003,785.4118
L/min to GPM
L/minGPM
10.26417205
51.3208603
102.6417205
256.6043013
5013.208603
10026.417205
1000264.17205
m³/h to L/s
m³/hL/s
10.27777778
51.3888889
102.7777778
256.9444444
5013.888889
10027.777778
1000277.77778
CFM to m³/h
CFMm³/h
11.6990108
58.495054
1016.990108
2542.47527
5084.95054
100169.90108
10001,699.0108

Unit reference

UnitSymbolEquals
Liter per secondL/s1 L/s = 0.001 m³/s
Liter per minuteL/min1 L/min = 0.00001666666667 m³/s
Liter per hourL/h1 L/h = 2.777777778e-7 m³/s
Milliliter per minutemL/min1 mL/min = 1.666666667e-8 m³/s
Cubic meter per secondm³/sbase unit
Cubic meter per minutem³/min1 m³/min = 0.01666666667 m³/s
Cubic meter per hourm³/h1 m³/h = 0.0002777777778 m³/s
US gallon per minuteGPM1 GPM = 0.0000630901964 m³/s
US gallon per hourGPH1 GPH = 0.000001051503273 m³/s
Imperial gallon per minuteimp GPM1 imp GPM = 0.00007576816667 m³/s
Cubic foot per secondft³/s1 ft³/s = 0.02831684659 m³/s
Cubic foot per minuteCFM1 CFM = 0.0004719474432 m³/s

About this flow rate converter

Convert volumetric flow rate between metric, US and imperial units. It is designed for pumps, pipes, HVAC and ventilation, irrigation, water supply and industrial process work.

Flow rate is volume per unit time; see the volume converter and time converter, and the pressure converter for pump head.

Plumbing & pumps

Compare pump ratings in GPM, L/min and m³/h when sizing pipes and equipment.

HVAC & ventilation

Convert fan airflow between CFM and m³/h for ducts and room ventilation.

Irrigation & water

Translate well, tap and sprinkler flow between L/min and gallons per minute.

Tips for accurate results

US vs imperial gallons

GPM here is the US gallon per minute. Imperial GPM is about 20% larger; the imperial unit is shown separately.

Quick conversion

1 GPM ≈ 3.785 L/min and 1 CFM ≈ 1.699 m³/h.

Frequently asked questions

How do I convert GPM to L/min?

Multiply US gallons per minute by 3.785412. For example, 10 GPM ≈ 37.85 L/min.

How do I convert CFM to m³/h?

Multiply CFM by 1.69901. For example, 500 CFM ≈ 849.5 m³/h.

How many liters per second are in a m³/h?

One cubic meter per hour is about 0.27778 L/s.

Is this mass flow or volumetric flow?

Volumetric flow. To get mass flow, multiply by the fluid density (see the density converter).

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