Liquid application rate.
Gallons per Acre to Gallons per Square mile Converter — gal/ac to gal/mi2
Convert Gallon per Acre (gal/ac) to Gallon per Square mile (gal/mi2) using the exact conversion factor (1 gallon per acre = 640 gallon per square mile). See the formula, worked examples, and conversion table.
Gallons per Acre to Gallons per Square mile converter
Converter
Agriculture Converter
Convert acres, hectares, yield, seed, fertilizer, irrigation, and application-rate units.
Context values
Some unit families need one extra value for a physically accurate result.
Liquid application rate.
Result = input x 9.35395623e-7 / 1.46155566e-9.
Liquid Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Gallons per Acre to Gallons per Square mile
Gallon per Acre and Gallon per Square mile both measure a farming-related quantity — a land area or an application/yield rate per unit area — used to report crop yields, calculate how much fertilizer or seed a field needs, and plan irrigation. Both are liquid application rate units.
Formula
gallons per square mile = gallons per acre × 640
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per acre equals 9.353956e-7 base units, and 1 gallon per square mile equals 1.461556e-9 base units, so dividing one by the other gives the direct gallon per acre-to-gallon per square mile factor of 640.
Simple example
1 gal/ac × 640 = 640 gal/mi2
1 gallon per acre = 640 gallons per square mile.
Real-world example
100 gal/ac × 640 = 64,000 gal/mi2
100 gallons per acre = 64,000 gallons per square mile.
Conversion table
| Gallon per Acre (gal/ac) | Gallon per Square mile (gal/mi2) |
|---|---|
| 1 gal/ac | 640 gal/mi2 |
| 5 gal/ac | 3,200 gal/mi2 |
| 10 gal/ac | 6,400 gal/mi2 |
| 50 gal/ac | 32,000 gal/mi2 |
| 100 gal/ac | 64,000 gal/mi2 |
| 500 gal/ac | 320,000 gal/mi2 |
Reverse conversion: Gallon per Square mile to Gallon per Acre
640 gal/mi2 × 0.0015625 = 1 gal/ac
640 gallons per square mile = 1 gallons per acre.
gallons per acre = gallons per square mile × 0.0015625
For a page dedicated to this direction, see Gallon per Square mile to Gallon per Acre.
Understanding the Gallon per Acre (gal/ac)
Liquid application rate.
Understanding the Gallon per Square mile (gal/mi2)
Liquid application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallons per square mile are in 1 gallon per acre?
1 gallon per acre equals 640 gallons per square mile, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per acre to gallon per square mile?
Multiply the gallon per acre value by 640. The converter above does this instantly to whatever precision you set.
How do I convert gallon per square mile back to gallon per acre?
Use the reverse factor: 1 gallon per square mile equals 0.0015625 gallons per acre. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per acre?
Gallon per Acre (gal/ac) is a unit of agriculture.
What is a gallon per square mile?
Gallon per Square mile (gal/mi2) is a unit of agriculture.
Is the gallon per acre to gallon per square mile conversion exact?
Yes. Both gallon per acre and gallon per square mile are defined by fixed standards rather than physical artifacts, so the factor of 640 used above is exact to as many digits as you choose to display.
What's the difference between a yield rate and an application rate?
A yield rate describes how much of a crop is harvested per unit of land area (for example, tonnes per hectare). An application rate describes how much of an input like fertilizer or seed is applied per unit of land area. Both are commonly expressed using the same kind of mass-per-area units.