How flow rate converter works
Volumetric flow — volume passing a point per unit time — is quoted in a different unit by every industry: plumbers and pump makers use gallons or liters per minute, HVAC engineers use cubic feet per minute (CFM), water utilities use cubic meters per hour, and lab pumps use milliliters per minute. This converter translates any of the twelve units into any other.
Every conversion is anchored to liters per second using exact definitions: one US gallon is exactly 3.785411784 L, one imperial gallon is exactly 4.54609 L and one cubic foot is exactly 28.316846592 L. The tool normalizes your value through L/s, so both directions of every pair agree.
Results are reported to 12 significant digits, with the intermediate value in L/s shown for every conversion so you can check magnitudes at a glance — 10 US gpm is 37.85 L/min, one CFM is 28.32 L/min or 7.48 gpm, and one m³/h is 16.67 L/min. All math runs in your browser.