To convert liters per hour to cubic feet per hour, multiply by 0.03531466672. 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.
Gas appliance and small-flow rating in the US. 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. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into cubic feet per hour, which is usually more useful than the bare number.
The formula
liters per hour- The amount you are converting, in liters per hour
0.0353146667215- The exact number of cubic feet per hour in one liter per hour
cubic feet per hour- The converted result
How it works, step by step
- Enter the value in liters per hour.
- It is multiplied by 0.0353146667215, the exact factor between the two units.
- The answer is shown in cubic feet per hour, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A dripping tap: 0.36 L/h in cubic feet per hour
At 0.36 L/h (a dripping tap), the same quantity in cubic feet per hour is 0.36 × 0.0353147 = 0.0127133 CFH. One liter per hour is 0.0353147 cubic feet per hour, so the numbers shrink as expected.
A bathroom tap: 360 L/h in cubic feet per hour
At 360 L/h (a bathroom tap), the same quantity in cubic feet per hour is 360 × 0.0353147 = 12.7133 CFH. One liter per hour is 0.0353147 cubic feet per hour, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many cubic feet per hour are in one liter per hour?
Exactly 0.0353146667215. 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 cubic feet per hour?
cubic feet per hour = liters per hour × 0.0353146667215. Reversed, liters per hour = cubic feet per hour ÷ 0.0353146667215, which is the same as multiplying by 28.316846592.
Which is the bigger unit, the liter per hour or the cubic foot per hour?
The cubic foot per hour. One liter per hour is only 0.0353147 of a cubic foot per hour, so it takes 28.3168 liters per hour to make one cubic foot 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 liter per hour?
The rating unit for dosing pumps, drip irrigation and small boilers.
What is a cubic foot per hour?
Gas appliance and small-flow rating in the US.
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 CFH in my head?
Plenty of people do this in their head: divide by 28 instead of using the exact factor 0.03531466672. At 100 that shortcut gives 3.5714286 cubic feet per hour, off by 0.03996 cubic feet per hour or about 1.13%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Liters Per Hour to cubic feet per hour reference tables
| Liters Per Hour | Cubic Feet Per Hour |
|---|---|
| 0.5 L/h | 0.0176573 CFH |
| 1 L/h | 0.0353147 CFH |
| 2 L/h | 0.0706293 CFH |
| 3 L/h | 0.105944 CFH |
| 5 L/h | 0.176573 CFH |
| 10 L/h | 0.353147 CFH |
| 20 L/h | 0.706293 CFH |
| 25 L/h | 0.882867 CFH |
| 50 L/h | 1.76573 CFH |
| 75 L/h | 2.6486 CFH |
| 100 L/h | 3.53147 CFH |
| 250 L/h | 8.82867 CFH |
| 500 L/h | 17.6573 CFH |
| 1000 L/h | 35.3147 CFH |
| 5000 L/h | 176.573 CFH |
Exact factor: 1 liter per hour = 0.0353146667215 cubic feet per hour.
| Quantity | L/h | CFH |
|---|---|---|
| A dripping tap | 0.36 L/h | 0.01271 CFH |
| A bathroom tap | 360 L/h | 12.71 CFH |
| A shower head | 576 L/h | 20.34 CFH |
| A garden hose | 1080 L/h | 38.14 CFH |
| A fire hydrant | 2.16e+05 L/h | 7628 CFH |
| The Thames at London | 2.34e+08 L/h | 8.264e+06 CFH |
Published reference values, converted with the same factor this page uses.