Mass application rate.
Pounds per Square mile to Pounds per Acre Converter — lb/mi2 to lb/ac
Convert Pound per Square mile (lb/mi2) to Pound per Acre (lb/ac) using the exact conversion factor (1 pound per square mile = 0.0015625 pound per acre). See the formula, worked examples, and conversion table.
Pounds per Square mile to Pounds 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 1.75132993e-7 / 0.0001120851156.
Mass Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Square mile to Pounds per Acre
Pound per Square mile and Pound 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
pounds per acre = pounds per square mile × 0.0015625
This factor comes from each unit's defined relationship to the category's base unit: 1 pound per square mile equals 1.75133e-7 base units, and 1 pound per acre equals 0.000112085115619 base units, so dividing one by the other gives the direct pound per square mile-to-pound per acre factor of 0.0015625.
Simple example
1 lb/mi2 × 0.0015625 = 0.0015625 lb/ac
1 pound per square mile = 0.0015625 pounds per acre.
Real-world example
100 lb/mi2 × 0.0015625 = 0.15625 lb/ac
100 pounds per square mile = 0.15625 pounds per acre.
Conversion table
| Pound per Square mile (lb/mi2) | Pound per Acre (lb/ac) |
|---|---|
| 1 lb/mi2 | 0.0015625 lb/ac |
| 5 lb/mi2 | 0.0078125 lb/ac |
| 10 lb/mi2 | 0.015625 lb/ac |
| 50 lb/mi2 | 0.078125 lb/ac |
| 100 lb/mi2 | 0.15625 lb/ac |
| 500 lb/mi2 | 0.78125 lb/ac |
Reverse conversion: Pound per Acre to Pound per Square mile
0.0015625 lb/ac × 640 = 1 lb/mi2
0.0015625 pounds per acre = 1 pounds per square mile.
pounds per square mile = pounds per acre × 640
For a page dedicated to this direction, see Pound per Acre to Pound per Square mile.
Understanding the Pound per Square mile (lb/mi2)
Mass application rate.
Understanding the Pound per Acre (lb/ac)
Mass application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per acre are in 1 pound per square mile?
1 pound per square mile equals 0.0015625 pounds per acre, using the exact defined conversion factor rather than an estimate.
How do I convert pound per square mile to pound per acre?
Multiply the pound per square mile value by 0.0015625. The converter above does this instantly to whatever precision you set.
How do I convert pound per acre back to pound per square mile?
Use the reverse factor: 1 pound per acre equals 640 pounds per square mile. You can also use the swap control in the converter above to flip the direction instantly.
What is a pound per square mile?
Pound per Square mile (lb/mi2) is a unit of agriculture.
What is a pound per acre?
Pound per Acre (lb/ac) is a unit of agriculture.
Is the pound per square mile to pound per acre conversion exact?
Yes. Both pound per square mile and pound 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.