To convert liters per hour to US gallons per day, multiply by 6.340130564. 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 rating unit for reverse-osmosis membranes and water demand.
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 US gallons per day, so you can sanity-check whether your answer is a plausible size.
The formula
liters per hour- The amount you are converting, in liters per hour
6.34013056409- The exact number of US gallons per day in one liter per hour
US gallons per day- The converted result
How it works, step by step
- Enter the value in liters per hour.
- It is multiplied by 6.34013056409, the exact factor between the two units.
- The answer is shown in US gallons per day, 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 US gallons per day
A shower head comes to about 576 L/h. Multiplying by the factor: 576 × 6.34013 = 3651.92 GPD. Dividing the answer back by 6.34013 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A bathroom tap: 360 L/h in US gallons per day
A bathroom tap comes to about 360 L/h. Multiplying by the factor: 360 × 6.34013 = 2282.45 GPD. Dividing the answer back by 6.34013 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 US gallons per day are in one liter per hour?
Exactly 6.34013056409. 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 US gallons per day?
US gallons per day = liters per hour × 6.34013056409. Reversed, liters per hour = US gallons per day ÷ 6.34013056409, which is the same as multiplying by 0.157725458473.
Which is the bigger unit, the liter per hour or the US gallon per day?
The liter per hour. One liter per hour equals 6.34013 US gallons per day.
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 US gallon per day?
The rating unit for reverse-osmosis membranes and water demand.
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 GPD in my head?
Plenty of people do this in their head: multiply by 6.3 instead of using the exact factor 6.340130564. At 100 that shortcut gives 630 US gallons per day, off by 4.013 US gallons per day or about 0.63%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Liters Per Hour to US gallons per day reference tables
| Liters Per Hour | Us Gallons Per Day |
|---|---|
| 0.5 L/h | 3.17007 GPD |
| 1 L/h | 6.34013 GPD |
| 2 L/h | 12.6803 GPD |
| 3 L/h | 19.0204 GPD |
| 5 L/h | 31.7007 GPD |
| 10 L/h | 63.4013 GPD |
| 20 L/h | 126.803 GPD |
| 25 L/h | 158.503 GPD |
| 50 L/h | 317.007 GPD |
| 75 L/h | 475.51 GPD |
| 100 L/h | 634.013 GPD |
| 250 L/h | 1585.03 GPD |
| 500 L/h | 3170.07 GPD |
| 1000 L/h | 6340.13 GPD |
| 5000 L/h | 31,700.7 GPD |
Exact factor: 1 liter per hour = 6.34013056409 US gallons per day.
| Quantity | L/h | GPD |
|---|---|---|
| A dripping tap | 0.36 L/h | 2.282 GPD |
| A bathroom tap | 360 L/h | 2282 GPD |
| A shower head | 576 L/h | 3652 GPD |
| A garden hose | 1080 L/h | 6847 GPD |
| A fire hydrant | 2.16e+05 L/h | 1.369e+06 GPD |
| The Thames at London | 2.34e+08 L/h | 1.484e+09 GPD |
Published reference values, converted with the same factor this page uses.