Mass application rate.
Pounds per Square mile to Short tons per Acre Converter — lb/mi2 to ton/ac
Convert Pound per Square mile (lb/mi2) to Short ton per Acre (ton/ac) using the exact conversion factor (1 pound per square mile = 7.8125e-7 short ton per acre). See the formula, worked examples, and conversion table.
Pounds per Square mile to Short tons 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 / 0.2241702312.
Mass Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Pounds per Square mile to Short tons per Acre
Pound per Square mile and Short ton 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
short tons per acre = pounds per square mile × 7.8125e-7
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 short ton per acre equals 0.224170231239 base units, so dividing one by the other gives the direct pound per square mile-to-short ton per acre factor of 7.8125e-7.
Simple example
1 lb/mi2 × 7.8125e-7 = 7.8125e-7 ton/ac
1 pound per square mile = 7.8125e-7 short tons per acre.
Real-world example
100 lb/mi2 × 7.8125e-7 = 0.000078125 ton/ac
100 pounds per square mile = 0.000078125 short tons per acre.
Conversion table
| Pound per Square mile (lb/mi2) | Short ton per Acre (ton/ac) |
|---|---|
| 1 lb/mi2 | 7.8125e-7 ton/ac |
| 5 lb/mi2 | 0.0000039063 ton/ac |
| 10 lb/mi2 | 0.0000078125 ton/ac |
| 50 lb/mi2 | 0.0000390625 ton/ac |
| 100 lb/mi2 | 0.000078125 ton/ac |
| 500 lb/mi2 | 0.000390625 ton/ac |
Reverse conversion: Short ton per Acre to Pound per Square mile
7.8125e-7 ton/ac × 1280000 = 1 lb/mi2
7.8125e-7 short tons per acre = 1 pound per square mile.
pounds per square mile = short tons per acre × 1280000
For a page dedicated to this direction, see Short ton per Acre to Pound per Square mile.
Understanding the Pound per Square mile (lb/mi2)
Mass application rate.
Understanding the Short ton per Acre (ton/ac)
Mass application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many short tons per acre are in 1 pound per square mile?
1 pound per square mile equals 7.8125e-7 short tons per acre, using the exact defined conversion factor rather than an estimate.
How do I convert pound per square mile to short ton per acre?
Multiply the pound per square mile value by 7.8125e-7. The converter above does this instantly to whatever precision you set.
How do I convert short ton per acre back to pound per square mile?
Use the reverse factor: 1 short ton per acre equals 1,280,000 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 short ton per acre?
Short ton per Acre (ton/ac) is a unit of agriculture.
Is the pound per square mile to short ton per acre conversion exact?
Yes. Both pound per square mile and short ton per acre are defined by fixed standards rather than physical artifacts, so the factor of 7.8125e-7 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.