Gallon per minute is a measurement of the amount of liquid passing through a given cross-sectional area in one minute. It is commonly used to describe the flow rate of water through pipes. It is also known as the volume flow rate and can be derived from a pressure gauge reading.

GPM is also often confused with PSI (pounds per square inch), which is a measure of pressure. The gallons per minute calculator allows you to determine water’s flow rate in gallons per minute from the PSI reading on your pressure gauge.

To calculate gallons per minute, get a container with a known capacity (such as a five gallon bucket). Time how long it takes the container to fill. Divide the container’s capacity in gallons by the time in seconds and multiply the result by 60 to find gallons per minute.

A standard garden hose usually has a water flow rate of 9 to 17 gallons per minute, though this can vary depending on the type of hose and water pressure. To calculate gallons per hour, divide the number of gallons per minute by the number of minutes in an hour. Gallons per minute can also be used to calculate the flow rate of a showerhead. Standard showerheads typically have a flow rate of about 2 gallons per minute in the US. To calculate the flow rate of a showerhead, you can use a specialized GPM calculator. Our specialized GPM calculator includes the conversion to LPM, which can be helpful if you’re using a different measuring system. gpm to lpm converter