To convert US gallons per day to milliliters per minute, multiply by 2.628757641. 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.
The rating unit for reverse-osmosis membranes and water demand. Laboratory and infusion flow: HPLC pumps and syringe drivers are set in mL/min.
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. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into milliliters per minute, which is usually more useful than the bare number.
The formula
US gallons per day- The amount you are converting, in US gallons per day
2.62875764122- The exact number of milliliters per minute in one US gallon per day
milliliters per minute- The converted result
How it works, step by step
- Enter the value in US gallons per day.
- It is multiplied by 2.62875764122, 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 bathroom tap: 2280 GPD in milliliters per minute
A bathroom tap comes to about 2280 GPD. Multiplying by the factor: 2280 × 2.62876 = 5993.57 mL/min. Dividing the answer back by 2.62876 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A shower head: 3650 GPD in milliliters per minute
Take a shower head, roughly 3650 GPD. The conversion is a single multiplication — 3650 × 2.62876 — giving 9594.97 mL/min. Because the relationship is proportional, doubling the input doubles the answer to 19,189.9 mL/min.
How to read your score
Frequently asked questions
How many milliliters per minute are in one US gallon per day?
Exactly 2.62875764122. 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 day to milliliters per minute?
milliliters per minute = US gallons per day × 2.62875764122. Reversed, US gallons per day = milliliters per minute ÷ 2.62875764122, which is the same as multiplying by 0.380407833846.
Which is the bigger unit, the US gallon per day or the milliliter per minute?
The US gallon per day. One US gallon per day equals 2.62876 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 day?
The rating unit for reverse-osmosis membranes and water demand.
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 GPD to mL/min in my head?
Plenty of people do this in their head: multiply by 2.6 instead of using the exact factor 2.628757641. At 100 that shortcut gives 260 milliliters per minute, off by 2.876 milliliters per minute or about 1.09%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Us Gallons Per Day to milliliters per minute reference tables
| Us Gallons Per Day | Milliliters Per Minute |
|---|---|
| 0.5 GPD | 1.31438 mL/min |
| 1 GPD | 2.62876 mL/min |
| 2 GPD | 5.25752 mL/min |
| 3 GPD | 7.88627 mL/min |
| 5 GPD | 13.1438 mL/min |
| 10 GPD | 26.2876 mL/min |
| 20 GPD | 52.5752 mL/min |
| 25 GPD | 65.7189 mL/min |
| 50 GPD | 131.438 mL/min |
| 75 GPD | 197.157 mL/min |
| 100 GPD | 262.876 mL/min |
| 250 GPD | 657.189 mL/min |
| 500 GPD | 1314.38 mL/min |
| 1000 GPD | 2628.76 mL/min |
| 5000 GPD | 13,143.8 mL/min |
Exact factor: 1 US gallon per day = 2.62875764122 milliliters per minute.
| Quantity | GPD | mL/min |
|---|---|---|
| A dripping tap | 2.282 GPD | 6 mL/min |
| A bathroom tap | 2282 GPD | 6000 mL/min |
| A shower head | 3652 GPD | 9600 mL/min |
| A garden hose | 6847 GPD | 1.8e+04 mL/min |
| A fire hydrant | 1.369e+06 GPD | 3.6e+06 mL/min |
| The Thames at London | 1.484e+09 GPD | 3.9e+09 mL/min |
Published reference values, converted with the same factor this page uses.