This page converts liters per hour into liters per second using the factor 0.0002777777778, and shows the reverse figure alongside it. Both units measure volumetric flow, which is why one number does the whole job.
The rating unit for dosing pumps, drip irrigation and small boilers. Used for plumbing design and compressed air.
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 liters per second, which is usually more useful than the bare number.
The formula
liters per hour- The amount you are converting, in liters per hour
0.000277777777778- The exact number of liters per second in one liter per hour
liters per second- The converted result
How it works, step by step
- Enter the value in liters per hour.
- It is multiplied by 0.000277777777778, the exact factor between the two units.
- The answer is shown in liters per second, 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 liters per second
At 576 L/h (a shower head), the same quantity in liters per second is 576 × 0.000277778 = 0.16 L/s. One liter per hour is 0.000277778 liters per second, so the numbers shrink as expected.
A bathroom tap: 360 L/h in liters per second
A bathroom tap comes to about 360 L/h. Multiplying by the factor: 360 × 0.000277778 = 0.1 L/s. Dividing the answer back by 0.000277778 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 second are in one liter per hour?
Exactly 0.000277777777778. 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 liters per second?
liters per second = liters per hour × 0.000277777777778. Reversed, liters per hour = liters per second ÷ 0.000277777777778, which is the same as multiplying by 3600.
Which is the bigger unit, the liter per hour or the liter per second?
The liter per second. One liter per hour is only 0.000277778 of a liter per second, so it takes 3600 liters per hour to make one liter per second.
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 liter per second?
Used for plumbing design and compressed air.
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.
Liters Per Hour to liters per second reference tables
| Liters Per Hour | Liters Per Second |
|---|---|
| 0.5 L/h | 0.000138889 L/s |
| 1 L/h | 0.000277778 L/s |
| 2 L/h | 0.000555556 L/s |
| 3 L/h | 0.000833333 L/s |
| 5 L/h | 0.00138889 L/s |
| 10 L/h | 0.00277778 L/s |
| 20 L/h | 0.00555556 L/s |
| 25 L/h | 0.00694444 L/s |
| 50 L/h | 0.0138889 L/s |
| 75 L/h | 0.0208333 L/s |
| 100 L/h | 0.0277778 L/s |
| 250 L/h | 0.0694444 L/s |
| 500 L/h | 0.138889 L/s |
| 1000 L/h | 0.277778 L/s |
| 5000 L/h | 1.38889 L/s |
Exact factor: 1 liter per hour = 0.000277777777778 liters per second.
| Quantity | L/h | L/s |
|---|---|---|
| A dripping tap | 0.36 L/h | 0.0001 L/s |
| A bathroom tap | 360 L/h | 0.1 L/s |
| A shower head | 576 L/h | 0.16 L/s |
| A garden hose | 1080 L/h | 0.3 L/s |
| A fire hydrant | 2.16e+05 L/h | 60 L/s |
| The Thames at London | 2.34e+08 L/h | 6.5e+04 L/s |
Published reference values, converted with the same factor this page uses.