Mass application rate.
Grams per Square mile to Grams per Acre Converter — g/mi2 to g/ac
Convert Gram per Square mile (g/mi2) to Gram per Acre (g/ac) using the exact conversion factor (1 gram per square mile = 0.0015625 gram per acre). See the formula, worked examples, and conversion table.
Grams per Square mile to Grams per Acre 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.
Mass application rate.
Result = input x 3.86102159e-10 / 2.47105381e-7.
Mass Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Square mile to Grams per Acre
Gram per Square mile and Gram per Acre 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 mass application rate units.
Formula
grams per acre = grams per square mile × 0.0015625
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per square mile equals 3.861022e-10 base units, and 1 gram per acre equals 2.471054e-7 base units, so dividing one by the other gives the direct gram per square mile-to-gram per acre factor of 0.0015625.
Simple example
1 g/mi2 × 0.0015625 = 0.0015625 g/ac
1 gram per square mile = 0.0015625 grams per acre.
Real-world example
100 g/mi2 × 0.0015625 = 0.15625 g/ac
100 grams per square mile = 0.15625 grams per acre.
Conversion table
| Gram per Square mile (g/mi2) | Gram per Acre (g/ac) |
|---|---|
| 1 g/mi2 | 0.0015625 g/ac |
| 5 g/mi2 | 0.0078125 g/ac |
| 10 g/mi2 | 0.015625 g/ac |
| 50 g/mi2 | 0.078125 g/ac |
| 100 g/mi2 | 0.15625 g/ac |
| 500 g/mi2 | 0.78125 g/ac |
Reverse conversion: Gram per Acre to Gram per Square mile
0.0015625 g/ac × 640 = 1 g/mi2
0.0015625 grams per acre = 1 gram per square mile.
grams per square mile = grams per acre × 640
For a page dedicated to this direction, see Gram per Acre to Gram per Square mile.
Understanding the Gram per Square mile (g/mi2)
Mass application rate.
Understanding the Gram per Acre (g/ac)
Mass application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per acre are in 1 gram per square mile?
1 gram per square mile equals 0.0015625 grams per acre, using the exact defined conversion factor rather than an estimate.
How do I convert gram per square mile to gram per acre?
Multiply the gram per square mile value by 0.0015625. The converter above does this instantly to whatever precision you set.
How do I convert gram per acre back to gram per square mile?
Use the reverse factor: 1 gram per acre equals 640 grams per square mile. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per square mile?
Gram per Square mile (g/mi2) is a unit of agriculture.
What is a gram per acre?
Gram per Acre (g/ac) is a unit of agriculture.
Is the gram per square mile to gram per acre conversion exact?
Yes. Both gram per square mile and gram per acre are defined by fixed standards rather than physical artifacts, so the factor of 0.0015625 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.