One US gallon per hour is exactly 0.5714285715 barrels per day, so converting US gallons per hour to barrels per day is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
Used for fuel burn and small pumps. The unit oil production is reported in worldwide.
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. Below the calculator there is a step table for the values people look up most, and a second table putting real volumetric flow figures into barrels per day so the number you get has something to be compared against.
The formula
US gallons per hour- The amount you are converting, in US gallons per hour
0.57142857146- The exact number of barrels per day in one US gallon per hour
barrels per day- The converted result
How it works, step by step
- Enter the value in US gallons per hour.
- It is multiplied by 0.57142857146, the exact factor between the two units.
- The answer is shown in barrels per day, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A bathroom tap: 95.1 GPH in barrels per day
A bathroom tap comes to about 95.1 GPH. Multiplying by the factor: 95.1 × 0.571429 = 54.3429 bbl/d. Dividing the answer back by 0.571429 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A fire hydrant: 5.71e+04 GPH in barrels per day
Take a fire hydrant, roughly 5.71e+04 GPH. The conversion is a single multiplication — 5.71e+04 × 0.571429 — giving 32,628.6 bbl/d. Because the relationship is proportional, doubling the input doubles the answer to 65,257.1 bbl/d.
How to read your score
Frequently asked questions
How many barrels per day are in one US gallon per hour?
Exactly 0.57142857146. 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 hour to barrels per day?
barrels per day = US gallons per hour × 0.57142857146. Reversed, US gallons per hour = barrels per day ÷ 0.57142857146, which is the same as multiplying by 1.7499999999.
Which is the bigger unit, the US gallon per hour or the barrel per day?
The barrel per day. One US gallon per hour is only 0.571429 of a barrel per day, so it takes 1.75 US gallons per hour to make one barrel 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 US gallon per hour?
Used for fuel burn and small pumps.
What is a barrel per day?
The unit oil production is reported in worldwide.
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 GPH to bbl/d in my head?
Plenty of people do this in their head: divide by 1.7 instead of using the exact factor 0.5714285715. At 100 that shortcut gives 58.823529 barrels per day, off by 1.681 barrels per day or about 2.94%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Us Gallons Per Hour to barrels per day reference tables
| Us Gallons Per Hour | Barrels Per Day |
|---|---|
| 0.5 GPH | 0.285714 bbl/d |
| 1 GPH | 0.571429 bbl/d |
| 2 GPH | 1.14286 bbl/d |
| 3 GPH | 1.71429 bbl/d |
| 5 GPH | 2.85714 bbl/d |
| 10 GPH | 5.71429 bbl/d |
| 20 GPH | 11.4286 bbl/d |
| 25 GPH | 14.2857 bbl/d |
| 50 GPH | 28.5714 bbl/d |
| 75 GPH | 42.8571 bbl/d |
| 100 GPH | 57.1429 bbl/d |
| 250 GPH | 142.857 bbl/d |
| 500 GPH | 285.714 bbl/d |
| 1000 GPH | 571.429 bbl/d |
| 5000 GPH | 2857.14 bbl/d |
Exact factor: 1 US gallon per hour = 0.57142857146 barrels per day.
| Quantity | GPH | bbl/d |
|---|---|---|
| A dripping tap | 0.0951 GPH | 0.05434 bbl/d |
| A bathroom tap | 95.1 GPH | 54.34 bbl/d |
| A shower head | 152.2 GPH | 86.95 bbl/d |
| A garden hose | 285.3 GPH | 163 bbl/d |
| A fire hydrant | 5.706e+04 GPH | 3.261e+04 bbl/d |
| The Thames at London | 6.182e+07 GPH | 3.532e+07 bbl/d |
Published reference values, converted with the same factor this page uses.