Quirkulator

Us Gallons Per Minute to Liters Per Hour Converter

Convert US gallons per minute to liters per hour with the exact factor 227.125, plus real reference values in both units.

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Result in liters per hour
Adjust the inputs

Your result updates live as you type.

To convert US gallons per minute to liters per hour, multiply by 227.1247071. 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 dosing pumps, drip irrigation and small boilers. The US standard for pumps, irrigation and fixtures.

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. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in liters per hour, so you can sanity-check whether your answer is a plausible size.

The formula

liters per hour = US gallons per minute × 227.124707052
US gallons per minute
The amount you are converting, in US gallons per minute
227.124707052
The exact number of liters per hour in one US gallon per minute
liters per hour
The converted result

How it works, step by step

  1. Enter the value in US gallons per minute.
  2. It is multiplied by 227.124707052, the exact factor between the two units.
  3. The answer is shown in liters per hour, with the reverse conversion beneath it.
  4. Check the reference table if you want a figure of comparable size.

Worked examples

The Thames at London: 1.03e+06 GPM in liters per hour

At 1.03e+06 GPM (the thames at london), the same quantity in liters per hour is 1.03e+06 × 227.125 = 2.33938e+08 L/h. One US gallon per minute is 227.125 liters per hour, so the numbers grow as expected.

A dripping tap: 0.00159 GPM in liters per hour

At 0.00159 GPM (a dripping tap), the same quantity in liters per hour is 0.00159 × 227.125 = 0.361128 L/h. One US gallon per minute is 227.125 liters per hour, so the numbers grow as expected.

How to read your score

0–0ZeroZero US gallons per minute is zero liters per hour.
0–1Under one unitThe answer is less than one liter per hour.
1–1,000Everyday rangeA typical working figure in liters per hour.
1,000–—Large valueLarge enough that the exact figure below the gauge is easier to read than the gauge itself.

Frequently asked questions

How many liters per hour are in one US gallon per minute?

Exactly 227.124707052. 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 minute to liters per hour?

liters per hour = US gallons per minute × 227.124707052. Reversed, US gallons per minute = liters per hour ÷ 227.124707052, which is the same as multiplying by 0.00440286753906.

Which is the bigger unit, the US gallon per minute or the liter per hour?

The US gallon per minute. One US gallon per minute equals 227.125 liters 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 US gallon per minute?

The US standard for pumps, irrigation and fixtures.

What is a liter per hour?

The rating unit for dosing pumps, drip irrigation and small boilers.

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 GPM to L/h in my head?

Plenty of people do this in their head: multiply by 230 instead of using the exact factor 227.1247071. At 100 that shortcut gives 23,000 liters per hour, off by 287.5 liters per hour or about 1.27%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.

Us Gallons Per Minute to liters per hour reference tables

Us Gallons Per Minute to liters per hour conversion table
Us Gallons Per MinuteLiters Per Hour
0.5 GPM113.562 L/h
1 GPM227.125 L/h
2 GPM454.249 L/h
3 GPM681.374 L/h
5 GPM1135.62 L/h
10 GPM2271.25 L/h
20 GPM4542.49 L/h
25 GPM5678.12 L/h
50 GPM11,356.2 L/h
75 GPM17,034.4 L/h
100 GPM22,712.5 L/h
250 GPM56,781.2 L/h
500 GPM113,562 L/h
1000 GPM227,125 L/h
5000 GPM1.13562e+06 L/h

Exact factor: 1 US gallon per minute = 227.124707052 liters per hour.

Real volumetric flow figures in US gallons per minute and liters per hour
QuantityGPML/h
A dripping tap0.001585 GPM0.36 L/h
A bathroom tap1.585 GPM360 L/h
A shower head2.536 GPM576 L/h
A garden hose4.755 GPM1080 L/h
A fire hydrant951 GPM2.16e+05 L/h
The Thames at London1.03e+06 GPM2.34e+08 L/h

Published reference values, converted with the same factor this page uses.

Related calculators

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Flow Rate Unit Pairs

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