This page converts cubic feet per hour into liters per minute using the factor 0.4719474432, and shows the reverse figure alongside it. Both units measure volumetric flow, which is why one number does the whole job.
Gas appliance and small-flow rating in the US. The flow unit for taps, showers and medical oxygen.
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 minute, so you can sanity-check whether your answer is a plausible size.
The formula
cubic feet per hour- The amount you are converting, in cubic feet per hour
0.4719474432- The exact number of liters per minute in one cubic foot per hour
liters per minute- The converted result
How it works, step by step
- Enter the value in cubic feet per hour.
- It is multiplied by 0.4719474432, the exact factor between the two units.
- The answer is shown in liters per minute, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A fire hydrant: 7630 CFH in liters per minute
At 7630 CFH (a fire hydrant), the same quantity in liters per minute is 7630 × 0.471947 = 3600.96 L/min. One cubic foot per hour is 0.471947 liters per minute, so the numbers shrink as expected.
A garden hose: 38.1 CFH in liters per minute
A garden hose comes to about 38.1 CFH. Multiplying by the factor: 38.1 × 0.471947 = 17.9812 L/min. Dividing the answer back by 0.471947 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
How to read your score
Frequently asked questions
How many liters per minute are in one cubic foot per hour?
Exactly 0.4719474432. 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 cubic feet per hour to liters per minute?
liters per minute = cubic feet per hour × 0.4719474432. Reversed, cubic feet per hour = liters per minute ÷ 0.4719474432, which is the same as multiplying by 2.11888000329.
Which is the bigger unit, the cubic foot per hour or the liter per minute?
The liter per minute. One cubic foot per hour is only 0.471947 of a liter per minute, so it takes 2.11888 cubic feet per hour to make one liter 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 cubic foot per hour?
Gas appliance and small-flow rating in the US.
What is a liter per minute?
The flow unit for taps, showers and medical oxygen.
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 CFH to L/min in my head?
Plenty of people do this in their head: divide by 2.1 instead of using the exact factor 0.4719474432. At 100 that shortcut gives 47.619048 liters per minute, off by 0.4243 liters per minute or about 0.90%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Cubic Feet Per Hour to liters per minute reference tables
| Cubic Feet Per Hour | Liters Per Minute |
|---|---|
| 0.5 CFH | 0.235974 L/min |
| 1 CFH | 0.471947 L/min |
| 2 CFH | 0.943895 L/min |
| 3 CFH | 1.41584 L/min |
| 5 CFH | 2.35974 L/min |
| 10 CFH | 4.71947 L/min |
| 20 CFH | 9.43895 L/min |
| 25 CFH | 11.7987 L/min |
| 50 CFH | 23.5974 L/min |
| 75 CFH | 35.3961 L/min |
| 100 CFH | 47.1947 L/min |
| 250 CFH | 117.987 L/min |
| 500 CFH | 235.974 L/min |
| 1000 CFH | 471.947 L/min |
| 5000 CFH | 2359.74 L/min |
Exact factor: 1 cubic foot per hour = 0.4719474432 liters per minute.
| Quantity | CFH | L/min |
|---|---|---|
| A dripping tap | 0.01271 CFH | 0.006 L/min |
| A bathroom tap | 12.71 CFH | 6 L/min |
| A shower head | 20.34 CFH | 9.6 L/min |
| A garden hose | 38.14 CFH | 18 L/min |
| A fire hydrant | 7628 CFH | 3600 L/min |
| The Thames at London | 8.264e+06 CFH | 3.9e+06 L/min |
Published reference values, converted with the same factor this page uses.