To convert milliliters per minute to US gallons per hour, multiply by 0.01585032314. That factor is the whole relationship: both units measure volumetric flow, so the conversion is a proportion with no offset and no substance-specific constant.
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 US gallons per hour so the number you get has something to be compared against.
The formula
milliliters per minute- The amount you are converting, in milliliters per minute
0.0158503231406- The exact number of US gallons per hour in one milliliter per minute
US gallons per hour- The converted result
How it works, step by step
- Enter the value in milliliters per minute.
- It is multiplied by 0.0158503231406, the exact factor between the two units.
- The answer is shown in US gallons per hour, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A garden hose: 1.8e+04 mL/min in US gallons per hour
At 1.8e+04 mL/min (a garden hose), the same quantity in US gallons per hour is 1.8e+04 × 0.0158503 = 285.306 GPH. One milliliter per minute is 0.0158503 US gallons per hour, so the numbers shrink as expected.
A dripping tap: 6 mL/min in US gallons per hour
Take a dripping tap, roughly 6 mL/min. The conversion is a single multiplication — 6 × 0.0158503 — giving 0.0951019 GPH. Because the relationship is proportional, doubling the input doubles the answer to 0.190204 GPH.
How to read your score
Frequently asked questions
How many US gallons per hour are in one milliliter per minute?
Exactly 0.0158503231406. 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 milliliters per minute to US gallons per hour?
US gallons per hour = milliliters per minute × 0.0158503231406. Reversed, milliliters per minute = US gallons per hour ÷ 0.0158503231406, which is the same as multiplying by 63.0901964034.
Which is the bigger unit, the milliliter per minute or the US gallon per hour?
The US gallon per hour. One milliliter per minute is only 0.0158503 of a US gallon per hour, so it takes 63.0902 milliliters per minute to make one US gallon per hour.
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 milliliter per minute?
Laboratory and infusion flow: HPLC pumps and syringe drivers are set in mL/min.
What is a US gallon per hour?
Used for fuel burn and small pumps.
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 mL/min to GPH in my head?
Plenty of people do this in their head: divide by 63 instead of using the exact factor 0.01585032314. At 100 that shortcut gives 1.5873016 US gallons per hour, off by 0.002269 US gallons per hour or about 0.14%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Milliliters Per Minute to US gallons per hour reference tables
| Milliliters Per Minute | Us Gallons Per Hour |
|---|---|
| 0.5 mL/min | 0.00792516 GPH |
| 1 mL/min | 0.0158503 GPH |
| 2 mL/min | 0.0317006 GPH |
| 3 mL/min | 0.047551 GPH |
| 5 mL/min | 0.0792516 GPH |
| 10 mL/min | 0.158503 GPH |
| 20 mL/min | 0.317006 GPH |
| 25 mL/min | 0.396258 GPH |
| 50 mL/min | 0.792516 GPH |
| 75 mL/min | 1.18877 GPH |
| 100 mL/min | 1.58503 GPH |
| 250 mL/min | 3.96258 GPH |
| 500 mL/min | 7.92516 GPH |
| 1000 mL/min | 15.8503 GPH |
| 5000 mL/min | 79.2516 GPH |
Exact factor: 1 milliliter per minute = 0.0158503231406 US gallons per hour.
| Quantity | mL/min | GPH |
|---|---|---|
| A dripping tap | 6 mL/min | 0.0951 GPH |
| A bathroom tap | 6000 mL/min | 95.1 GPH |
| A shower head | 9600 mL/min | 152.2 GPH |
| A garden hose | 1.8e+04 mL/min | 285.3 GPH |
| A fire hydrant | 3.6e+06 mL/min | 5.706e+04 GPH |
| The Thames at London | 3.9e+09 mL/min | 6.182e+07 GPH |
Published reference values, converted with the same factor this page uses.