This page converts US gallons per hour into acre-feet per day using the factor 7.365319866e-05, and shows the reverse figure alongside it. Both units measure volumetric flow, which is why one number does the whole job.
Irrigation and reservoir release rates in the western United States. Used for fuel burn and small pumps.
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 acre-feet per day, so you can sanity-check whether your answer is a plausible size.
The formula
US gallons per hour- The amount you are converting, in US gallons per hour
7.36531986596e-05- The exact number of acre-feet per day in one US gallon per hour
acre-feet per day- The converted result
How it works, step by step
- Enter the value in US gallons per hour.
- It is multiplied by 7.36531986596e-05, the exact factor between the two units.
- The answer is shown in acre-feet per day, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A dripping tap: 0.0951 GPH in acre-feet per day
Take a dripping tap, roughly 0.0951 GPH. The conversion is a single multiplication — 0.0951 × 7.36532e-05 — giving 7.00442e-06 ac ft/d. Because the relationship is proportional, doubling the input doubles the answer to 1.40088e-05 ac ft/d.
A shower head: 152 GPH in acre-feet per day
A shower head comes to about 152 GPH. Multiplying by the factor: 152 × 7.36532e-05 = 0.0111953 ac ft/d. Dividing the answer back by 7.36532e-05 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 acre-feet per day are in one US gallon per hour?
Exactly 7.36531986596e-05. 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 acre-feet per day?
acre-feet per day = US gallons per hour × 7.36531986596e-05. Reversed, US gallons per hour = acre-feet per day ÷ 7.36531986596e-05, which is the same as multiplying by 13,577.142856.
Which is the bigger unit, the US gallon per hour or the acre-foot per day?
The acre-foot per day. One US gallon per hour is only 7.36532e-05 of a acre-foot per day, so it takes 13,577.1 US gallons per hour to make one acre-foot 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 acre-foot per day?
Irrigation and reservoir release rates in the western United States.
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 ac ft/d in my head?
Plenty of people do this in their head: divide by 14,000 instead of using the exact factor 0.000074. At 100 that shortcut gives 0.0071428571 acre-feet per day, off by 0.0002225 acre-feet per day or about 3.02%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Us Gallons Per Hour to acre-feet per day reference tables
| Us Gallons Per Hour | Acre-Feet Per Day |
|---|---|
| 0.5 GPH | 3.68266e-05 ac ft/d |
| 1 GPH | 7.36532e-05 ac ft/d |
| 2 GPH | 0.000147306 ac ft/d |
| 3 GPH | 0.00022096 ac ft/d |
| 5 GPH | 0.000368266 ac ft/d |
| 10 GPH | 0.000736532 ac ft/d |
| 20 GPH | 0.00147306 ac ft/d |
| 25 GPH | 0.00184133 ac ft/d |
| 50 GPH | 0.00368266 ac ft/d |
| 75 GPH | 0.00552399 ac ft/d |
| 100 GPH | 0.00736532 ac ft/d |
| 250 GPH | 0.0184133 ac ft/d |
| 500 GPH | 0.0368266 ac ft/d |
| 1000 GPH | 0.0736532 ac ft/d |
| 5000 GPH | 0.368266 ac ft/d |
Exact factor: 1 US gallon per hour = 7.36531986596e-05 acre-feet per day.
| Quantity | GPH | ac ft/d |
|---|---|---|
| A dripping tap | 0.0951 GPH | 7.005e-06 ac ft/d |
| A bathroom tap | 95.1 GPH | 0.007005 ac ft/d |
| A shower head | 152.2 GPH | 0.01121 ac ft/d |
| A garden hose | 285.3 GPH | 0.02101 ac ft/d |
| A fire hydrant | 5.706e+04 GPH | 4.203 ac ft/d |
| The Thames at London | 6.182e+07 GPH | 4553 ac ft/d |
Published reference values, converted with the same factor this page uses.