This page converts US gallons per hour into milliliters per minute using the factor 63.0901964, and shows the reverse figure alongside it. Both units measure volumetric flow, which is why one number does the whole job.
Laboratory and infusion flow: HPLC pumps and syringe drivers are set in mL/min. Used for fuel burn and small pumps.
Standard versus actual volume. Gas flow in CFM depends on pressure and temperature, which is why compressor ratings say SCFM and specify the reference conditions. Converting the number is exact; comparing two ratings measured at different conditions is not. Below the calculator there is a step table for the values people look up most, and a second table putting real volumetric flow figures into milliliters per minute so the number you get has something to be compared against.
The formula
US gallons per hour- The amount you are converting, in US gallons per hour
63.0901964034- The exact number of milliliters per minute in one US gallon per hour
milliliters per minute- The converted result
How it works, step by step
- Enter the value in US gallons per hour.
- It is multiplied by 63.0901964034, the exact factor between the two units.
- The answer is shown in milliliters per minute, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A garden hose: 285 GPH in milliliters per minute
At 285 GPH (a garden hose), the same quantity in milliliters per minute is 285 × 63.0902 = 17,980.7 mL/min. One US gallon per hour is 63.0902 milliliters per minute, so the numbers grow as expected.
A dripping tap: 0.0951 GPH in milliliters per minute
At 0.0951 GPH (a dripping tap), the same quantity in milliliters per minute is 0.0951 × 63.0902 = 5.99988 mL/min. One US gallon per hour is 63.0902 milliliters per minute, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many milliliters per minute are in one US gallon per hour?
Exactly 63.0901964034. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert US gallons per hour to milliliters per minute?
milliliters per minute = US gallons per hour × 63.0901964034. Reversed, US gallons per hour = milliliters per minute ÷ 63.0901964034, which is the same as multiplying by 0.0158503231406.
Which is the bigger unit, the US gallon per hour or the milliliter per minute?
The US gallon per hour. One US gallon per hour equals 63.0902 milliliters per minute.
What does this quantity actually measure?
Both units measure volumetric flow. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a US gallon per hour?
Used for fuel burn and small pumps.
What is a milliliter per minute?
Laboratory and infusion flow: HPLC pumps and syringe drivers are set in mL/min.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do GPH to mL/min in my head?
Plenty of people do this in their head: multiply by 63 instead of using the exact factor 63.0901964. At 100 that shortcut gives 6300 milliliters per minute, off by 9.02 milliliters per minute or about 0.14%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Us Gallons Per Hour to milliliters per minute reference tables
| Us Gallons Per Hour | Milliliters Per Minute |
|---|---|
| 0.5 GPH | 31.5451 mL/min |
| 1 GPH | 63.0902 mL/min |
| 2 GPH | 126.18 mL/min |
| 3 GPH | 189.271 mL/min |
| 5 GPH | 315.451 mL/min |
| 10 GPH | 630.902 mL/min |
| 20 GPH | 1261.8 mL/min |
| 25 GPH | 1577.25 mL/min |
| 50 GPH | 3154.51 mL/min |
| 75 GPH | 4731.76 mL/min |
| 100 GPH | 6309.02 mL/min |
| 250 GPH | 15,772.5 mL/min |
| 500 GPH | 31,545.1 mL/min |
| 1000 GPH | 63,090.2 mL/min |
| 5000 GPH | 315,451 mL/min |
Exact factor: 1 US gallon per hour = 63.0901964034 milliliters per minute.
| Quantity | GPH | mL/min |
|---|---|---|
| A dripping tap | 0.0951 GPH | 6 mL/min |
| A bathroom tap | 95.1 GPH | 6000 mL/min |
| A shower head | 152.2 GPH | 9600 mL/min |
| A garden hose | 285.3 GPH | 1.8e+04 mL/min |
| A fire hydrant | 5.706e+04 GPH | 3.6e+06 mL/min |
| The Thames at London | 6.182e+07 GPH | 3.9e+09 mL/min |
Published reference values, converted with the same factor this page uses.