Liquid application rate.
Gallons per Square foot to Cubic Meters per Square Kilometer Converter — gal/ft2 to m3/km2
Convert Gallon per Square foot (gal/ft2) to Cubic Meter per Square Kilometer (m3/km2) using the exact conversion factor (1 gallon per square foot = 40,745.83333 cubic meter per square kilometer). See the formula, worked examples, and conversion table.
Gallons per Square foot to Cubic Meters per Square Kilometer 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 0.04074583333 / 1e-6.
Liquid Application Rate units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Gallons per Square foot to Cubic Meters per Square Kilometer
Gallon per Square foot and Cubic Meter per Square Kilometer 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
cubic meters per square kilometer = gallons per square foot × 40745.8333333
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per square foot equals 0.0407458333333 base units, and 1 cubic meter per square kilometer equals 0.000001 base units, so dividing one by the other gives the direct gallon per square foot-to-cubic meter per square kilometer factor of 40745.8333333.
Simple example
1 gal/ft2 × 40745.83333 = 40,745.83333 m3/km2
1 gallon per square foot = 40,745.83333 cubic meters per square kilometer.
Real-world example
100 gal/ft2 × 40745.83333 = 4,074,583.333 m3/km2
100 gallons per square foot = 4,074,583.333 cubic meters per square kilometer.
Conversion table
| Gallon per Square foot (gal/ft2) | Cubic Meter per Square Kilometer (m3/km2) |
|---|---|
| 1 gal/ft2 | 40,745.83333 m3/km2 |
| 5 gal/ft2 | 203,729.1667 m3/km2 |
| 10 gal/ft2 | 407,458.3333 m3/km2 |
| 50 gal/ft2 | 2,037,291.667 m3/km2 |
| 100 gal/ft2 | 4,074,583.333 m3/km2 |
| 500 gal/ft2 | 20,372,916.67 m3/km2 |
Reverse conversion: Cubic Meter per Square Kilometer to Gallon per Square foot
1 m3/km2 × 0.00002454238675 = 0.0000245424 gal/ft2
1 cubic meter per square kilometer = 0.0000245424 gallons per square foot.
gallons per square foot = cubic meters per square kilometer × 0.0000245423867471
For a page dedicated to this direction, see Cubic Meter per Square Kilometer to Gallon per Square foot.
Understanding the Gallon per Square foot (gal/ft2)
Liquid application rate.
Understanding the Cubic Meter per Square Kilometer (m3/km2)
Liquid application rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic meters per square kilometer are in 1 gallon per square foot?
1 gallon per square foot equals 40,745.83333 cubic meters per square kilometer, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per square foot to cubic meter per square kilometer?
Multiply the gallon per square foot value by 40745.83333. The converter above does this instantly to whatever precision you set.
How do I convert cubic meter per square kilometer back to gallon per square foot?
Use the reverse factor: 1 cubic meter per square kilometer equals 0.0000245424 gallons per square foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per square foot?
Gallon per Square foot (gal/ft2) is a unit of agriculture.
What is a cubic meter per square kilometer?
Cubic Meter per Square Kilometer (m3/km2) is a unit of agriculture.
Is the gallon per square foot to cubic meter per square kilometer conversion exact?
Yes. Both gallon per square foot and cubic meter per square kilometer are defined by fixed standards rather than physical artifacts, so the factor of 40745.83333 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.