Grain Bin Capacity Calculator
To use grain bin capacity calculator, input your grain bin dimensions in feet, enter diameter and height to eave e.g. enter 24 for a 24-foot diameter and 18 for an 18-foot height.
The calculator shows capacities at 100%, 75%, and 50% fill levels in bushels, cubic meters and liters.
A grain bin with a diameter of 4 m and a height of 6 m, the volume can be calculated using the formula Volume (m³) = π × (2)² × 6, which results in a volume of 75.40 m³. The capacity of the bin is 75.40 m³, equivalent to 75,400 liters.
Grain Bin Capacity Calculator
| Diameter (ft) | Height (ft) | Volume (cubic ft) | Estimated Capacity (bushels)* |
|---|---|---|---|
| 18 ft | 20 ft | 5,090 cu ft | ~4,059 bushels |
| 24 ft | 20 ft | 9,040 cu ft | ~7,207 bushels |
| 30 ft | 20 ft | 14,130 cu ft | ~11,267 bushels |
| 36 ft | 20 ft | 20,320 cu ft | ~16,192 bushels |
| 42 ft | 20 ft | 27,610 cu ft | ~22,088 bushels |
Grain Bin Capacity Formula
Flat Bottom Grain Bin:
Volume (m³) = π × r² × hHopper Bottom Grain Bin:
Volume (m³) = π × r² × h + (1/3) × π × r² × rWhere:
- r: Radius of the bin (r = Diameter / 2)
- h: Height of the bin
Volume (cu.ft) = π × radius² × heightBushels = Volume ÷ 1.244Parameters:
- π: Pi (3.14159)
- radius: Bin diameter ÷ 2
- height: Height to eave
- 1.244: Cubic feet per bushel
A bin 30 feet in diameter and 20 feet high: Volume = 3.14159 × (15)² × 20 = 14,137 cu.ft. Capacity = 14,137 ÷ 1.244 = 11,364 bushels.
How to Calculate Grain Bin Capacity?
To calculate bin capacity, first find the bin’s volume by multiplying π by the radius squared by the height. Then divide by 1.244 to convert to bushels. For a bin 24 feet in diameter (12-foot radius) and 16 feet high has a volume of 7,238 cu.ft, which equals 5,818 bushels.
For a bin 36 feet × 24 feet: 24,429 bushels at full capacity, 18,322 bushels at 75%, 12,215 bushels at 50%.
With bin 48 feet × 32 feet: 57,947 bushels at full capacity, 43,460 bushels at 75%, 28,974 bushels at 50%.
A bin 30 feet × 18 feet: 10,228 bushels at full capacity, 7,671 bushels at 75%, 5,114 bushels at 50%.
What is Grain Bin Capacity?
Grain Bin Capacity: Grain bin capacity is the total volume of grain that can be stored in a cylindrical storage bin, typically measured in bushels. The capacity depends on the bin’s diameter and height, with standard conversions used to calculate bushels from cubic feet.
Fill Levels: Different fill levels are important for planning storage. While a bin’s total capacity is calculated at 100%, practical storage often uses 75% or 50% fill levels to account for grain characteristics and handling requirements.