Mass application rate.
Grams per Square Kilometer to Grams per Square mile Converter — g/km2 to g/mi2
Convert Gram per Square Kilometer (g/km2) to Gram per Square mile (g/mi2) using the exact conversion factor (1 gram per square kilometer = 2.58998811 gram per square mile). See the formula, worked examples, and conversion table.
Grams per Square Kilometer to Grams 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.
Mass application rate.
Result = input x 1e-9 / 3.86102159e-10.
Mass Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Grams per Square Kilometer to Grams per Square mile
Gram per Square Kilometer and Gram 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 mass application rate units.
Formula
grams per square mile = grams per square kilometer × 2.58998811034
This factor comes from each unit's defined relationship to the category's base unit: 1 gram per square kilometer equals 1e-9 base units, and 1 gram per square mile equals 3.861022e-10 base units, so dividing one by the other gives the direct gram per square kilometer-to-gram per square mile factor of 2.58998811034.
Simple example
1 g/km2 × 2.58998811 = 2.58998811 g/mi2
1 gram per square kilometer = 2.58998811 grams per square mile.
Real-world example
100 g/km2 × 2.58998811 = 258.998811 g/mi2
100 grams per square kilometer = 258.998811 grams per square mile.
Conversion table
| Gram per Square Kilometer (g/km2) | Gram per Square mile (g/mi2) |
|---|---|
| 1 g/km2 | 2.58998811 g/mi2 |
| 5 g/km2 | 12.94994055 g/mi2 |
| 10 g/km2 | 25.8998811 g/mi2 |
| 50 g/km2 | 129.4994055 g/mi2 |
| 100 g/km2 | 258.998811 g/mi2 |
| 500 g/km2 | 1,294.994055 g/mi2 |
Reverse conversion: Gram per Square mile to Gram per Square Kilometer
2.58998811 g/mi2 × 0.3861021585 = 0.9999999999 g/km2
2.58998811 grams per square mile = 0.9999999999 grams per square kilometer.
grams per square kilometer = grams per square mile × 0.386102158542
For a page dedicated to this direction, see Gram per Square mile to Gram per Square Kilometer.
Understanding the Gram per Square Kilometer (g/km2)
Mass application rate.
Understanding the Gram per Square mile (g/mi2)
Mass application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per square mile are in 1 gram per square kilometer?
1 gram per square kilometer equals 2.58998811 grams per square mile, using the exact defined conversion factor rather than an estimate.
How do I convert gram per square kilometer to gram per square mile?
Multiply the gram per square kilometer value by 2.58998811. The converter above does this instantly to whatever precision you set.
How do I convert gram per square mile back to gram per square kilometer?
Use the reverse factor: 1 gram per square mile equals 0.3861021585 grams per square kilometer. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram per square kilometer?
Gram per Square Kilometer (g/km2) is a unit of agriculture.
What is a gram per square mile?
Gram per Square mile (g/mi2) is a unit of agriculture.
Is the gram per square kilometer to gram per square mile conversion exact?
Yes. Both gram per square kilometer and gram per square mile are defined by fixed standards rather than physical artifacts, so the factor of 2.58998811 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.