One acre-foot per day is exactly 226.2857143 US gallons per minute, so converting acre-feet per day to US gallons per minute 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.
Irrigation and reservoir release rates in the western United States. The US standard for pumps, irrigation and fixtures.
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 minute, so you can sanity-check whether your answer is a plausible size.
The formula
acre-feet per day- The amount you are converting, in acre-feet per day
226.285714266- The exact number of US gallons per minute in one acre-foot per day
US gallons per minute- The converted result
How it works, step by step
- Enter the value in acre-feet per day.
- It is multiplied by 226.285714266, the exact factor between the two units.
- The answer is shown in US gallons per minute, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A garden hose: 0.021 ac ft/d in US gallons per minute
Take a garden hose, roughly 0.021 ac ft/d. The conversion is a single multiplication — 0.021 × 226.286 — giving 4.752 GPM. Because the relationship is proportional, doubling the input doubles the answer to 9.504 GPM.
A bathroom tap: 0.007 ac ft/d in US gallons per minute
A bathroom tap comes to about 0.007 ac ft/d. Multiplying by the factor: 0.007 × 226.286 = 1.584 GPM. Dividing the answer back by 226.286 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 minute are in one acre-foot per day?
Exactly 226.285714266. 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 acre-feet per day to US gallons per minute?
US gallons per minute = acre-feet per day × 226.285714266. Reversed, acre-feet per day = US gallons per minute ÷ 226.285714266, which is the same as multiplying by 0.00441919191958.
Which is the bigger unit, the acre-foot per day or the US gallon per minute?
The acre-foot per day. One acre-foot per day equals 226.286 US gallons per minute.
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 acre-foot per day?
Irrigation and reservoir release rates in the western United States.
What is a US gallon per minute?
The US standard for pumps, irrigation and fixtures.
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 ac ft/d to GPM in my head?
Plenty of people do this in their head: multiply by 230 instead of using the exact factor 226.2857143. At 100 that shortcut gives 23,000 US gallons per minute, off by 371.4 US gallons per minute or about 1.64%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Acre-Feet Per Day to US gallons per minute reference tables
| Acre-Feet Per Day | Us Gallons Per Minute |
|---|---|
| 0.5 ac ft/d | 113.143 GPM |
| 1 ac ft/d | 226.286 GPM |
| 2 ac ft/d | 452.571 GPM |
| 3 ac ft/d | 678.857 GPM |
| 5 ac ft/d | 1131.43 GPM |
| 10 ac ft/d | 2262.86 GPM |
| 20 ac ft/d | 4525.71 GPM |
| 25 ac ft/d | 5657.14 GPM |
| 50 ac ft/d | 11,314.3 GPM |
| 75 ac ft/d | 16,971.4 GPM |
| 100 ac ft/d | 22,628.6 GPM |
| 250 ac ft/d | 56,571.4 GPM |
| 500 ac ft/d | 113,143 GPM |
| 1000 ac ft/d | 226,286 GPM |
| 5000 ac ft/d | 1.13143e+06 GPM |
Exact factor: 1 acre-foot per day = 226.285714266 US gallons per minute.
| Quantity | ac ft/d | GPM |
|---|---|---|
| A dripping tap | 7.005e-06 ac ft/d | 0.001585 GPM |
| A bathroom tap | 0.007005 ac ft/d | 1.585 GPM |
| A shower head | 0.01121 ac ft/d | 2.536 GPM |
| A garden hose | 0.02101 ac ft/d | 4.755 GPM |
| A fire hydrant | 4.203 ac ft/d | 951 GPM |
| The Thames at London | 4553 ac ft/d | 1.03e+06 GPM |
Published reference values, converted with the same factor this page uses.