One liter per hour is exactly 0.003666154138 imperial gallons per minute, so converting liters per hour 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 British pump unit, about 20% more volume per minute than the US gallon version. The rating unit for dosing pumps, drip irrigation and small boilers.
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
liters per hour- The amount you are converting, in liters per hour
0.00366615413832- The exact number of imperial gallons per minute in one liter per hour
imperial gallons per minute- The converted result
How it works, step by step
- Enter the value in liters per hour.
- It is multiplied by 0.00366615413832, 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 shower head: 576 L/h in imperial gallons per minute
At 576 L/h (a shower head), the same quantity in imperial gallons per minute is 576 × 0.00366615 = 2.1117 gpm. One liter per hour is 0.00366615 imperial gallons per minute, so the numbers shrink as expected.
A fire hydrant: 2.16e+05 L/h in imperial gallons per minute
Take a fire hydrant, roughly 2.16e+05 L/h. The conversion is a single multiplication — 2.16e+05 × 0.00366615 — giving 791.889 gpm. Because the relationship is proportional, doubling the input doubles the answer to 1583.78 gpm.
How to read your score
Frequently asked questions
How many imperial gallons per minute are in one liter per hour?
Exactly 0.00366615413832. 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 liters per hour to imperial gallons per minute?
imperial gallons per minute = liters per hour × 0.00366615413832. Reversed, liters per hour = imperial gallons per minute ÷ 0.00366615413832, which is the same as multiplying by 272.7654.
Which is the bigger unit, the liter per hour or the imperial gallon per minute?
The imperial gallon per minute. One liter per hour is only 0.00366615 of a imperial gallon per minute, so it takes 272.765 liters per hour 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 liter per hour?
The rating unit for dosing pumps, drip irrigation and small boilers.
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 L/h to gpm in my head?
Plenty of people do this in their head: divide by 270 instead of using the exact factor 0.003666154138. At 100 that shortcut gives 0.37037037 imperial gallons per minute, off by 0.003755 imperial gallons per minute or about 1.02%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Liters Per Hour to imperial gallons per minute reference tables
| Liters Per Hour | Imperial Gallons Per Minute |
|---|---|
| 0.5 L/h | 0.00183308 gpm |
| 1 L/h | 0.00366615 gpm |
| 2 L/h | 0.00733231 gpm |
| 3 L/h | 0.0109985 gpm |
| 5 L/h | 0.0183308 gpm |
| 10 L/h | 0.0366615 gpm |
| 20 L/h | 0.0733231 gpm |
| 25 L/h | 0.0916539 gpm |
| 50 L/h | 0.183308 gpm |
| 75 L/h | 0.274962 gpm |
| 100 L/h | 0.366615 gpm |
| 250 L/h | 0.916539 gpm |
| 500 L/h | 1.83308 gpm |
| 1000 L/h | 3.66615 gpm |
| 5000 L/h | 18.3308 gpm |
Exact factor: 1 liter per hour = 0.00366615413832 imperial gallons per minute.
| Quantity | L/h | gpm |
|---|---|---|
| A dripping tap | 0.36 L/h | 0.00132 gpm |
| A bathroom tap | 360 L/h | 1.32 gpm |
| A shower head | 576 L/h | 2.112 gpm |
| A garden hose | 1080 L/h | 3.959 gpm |
| A fire hydrant | 2.16e+05 L/h | 791.9 gpm |
| The Thames at London | 2.34e+08 L/h | 8.579e+05 gpm |
Published reference values, converted with the same factor this page uses.