One US gallon per day is exactly 0.0005782458423 imperial gallons per minute, so converting US gallons per day to imperial gallons per minute is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
The rating unit for reverse-osmosis membranes and water demand. The British pump unit, about 20% more volume per minute than the US gallon version.
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 imperial gallons per minute so the number you get has something to be compared against.
The formula
US gallons per day- The amount you are converting, in US gallons per day
0.000578245842299- The exact number of imperial gallons per minute in one US gallon per day
imperial gallons per minute- The converted result
How it works, step by step
- Enter the value in US gallons per day.
- It is multiplied by 0.000578245842299, the exact factor between the two units.
- The answer is shown in imperial gallons 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 imperial gallons per minute
A bathroom tap comes to about 2280 GPD. Multiplying by the factor: 2280 × 0.000578246 = 1.3184 gpm. Dividing the answer back by 0.000578246 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A garden hose: 6850 GPD in imperial gallons per minute
At 6850 GPD (a garden hose), the same quantity in imperial gallons per minute is 6850 × 0.000578246 = 3.96098 gpm. One US gallon per day is 0.000578246 imperial gallons per minute, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many imperial gallons per minute are in one US gallon per day?
Exactly 0.000578245842299. 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 imperial gallons per minute?
imperial gallons per minute = US gallons per day × 0.000578245842299. Reversed, US gallons per day = imperial gallons per minute ÷ 0.000578245842299, which is the same as multiplying by 1729.36824937.
Which is the bigger unit, the US gallon per day or the imperial gallon per minute?
The imperial gallon per minute. One US gallon per day is only 0.000578246 of a imperial gallon per minute, so it takes 1729.37 US gallons per day to make one imperial gallon 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 imperial gallon per minute?
The British pump unit, about 20% more volume per minute than the US gallon version.
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 gpm in my head?
Plenty of people do this in their head: divide by 1700 instead of using the exact factor 0.0005782458423. At 100 that shortcut gives 0.058823529 imperial gallons per minute, off by 0.0009989 imperial gallons per minute or about 1.73%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Us Gallons Per Day to imperial gallons per minute reference tables
| Us Gallons Per Day | Imperial Gallons Per Minute |
|---|---|
| 0.5 GPD | 0.000289123 gpm |
| 1 GPD | 0.000578246 gpm |
| 2 GPD | 0.00115649 gpm |
| 3 GPD | 0.00173474 gpm |
| 5 GPD | 0.00289123 gpm |
| 10 GPD | 0.00578246 gpm |
| 20 GPD | 0.0115649 gpm |
| 25 GPD | 0.0144561 gpm |
| 50 GPD | 0.0289123 gpm |
| 75 GPD | 0.0433684 gpm |
| 100 GPD | 0.0578246 gpm |
| 250 GPD | 0.144561 gpm |
| 500 GPD | 0.289123 gpm |
| 1000 GPD | 0.578246 gpm |
| 5000 GPD | 2.89123 gpm |
Exact factor: 1 US gallon per day = 0.000578245842299 imperial gallons per minute.
| Quantity | GPD | gpm |
|---|---|---|
| A dripping tap | 2.282 GPD | 0.00132 gpm |
| A bathroom tap | 2282 GPD | 1.32 gpm |
| A shower head | 3652 GPD | 2.112 gpm |
| A garden hose | 6847 GPD | 3.959 gpm |
| A fire hydrant | 1.369e+06 GPD | 791.9 gpm |
| The Thames at London | 1.484e+09 GPD | 8.579e+05 gpm |
Published reference values, converted with the same factor this page uses.