Calculate grain bin volume in cubic feet and bushels from diameter, wall height and roof height, plus approximate wheat tonnage.
Result
How to use this tool
Measure the bin diameter in feet.
Enter the straight-wall height, excluding the roof.
If the roof is a cone, enter its height; otherwise leave zero.
Volume, bushels and wheat tonnage appear instantly.
Formula & worked example
A 30 ft diameter bin with 20 ft walls holds about 11,360 bushels.
Limitations — read this before you rely on it
Geometric capacity only. Usable storage is lower once floors, cones, freeboard and grain behaviour are allowed for.
Frequently asked questions
1 bushel = 1.2445 cubic feet (2150.42 cubic inches).
Aeration floors, cone bottoms, freeboard and the grain heap shape all reduce fill.
No, bushels are volume. It changes weight: wheat 60 lb, corn 56 lb per bushel.
Leave roof height at zero and the tool counts only the cylinder.
No. Leave headspace for aeration and safe access.