Biology

Grain Bin Calculator

Estimate the bushel capacity of a round grain bin.

Bin diameter

Grain height

Calculated Output

Capacity (bushels) 3,272.91

Volume 4,071.5

Formula: bushels = π r² h ÷ 1.244

Step-by-Step Breakdown

1. Values used:

2. Bin diameter = 18

3. Grain height = 16

5. Capacity = 3,272.91bushels

6. Volume = 4,071.5

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The math behind it

Volume = π × radius² × height; 1 bushel = 1.244 ft³.

18 ft diameter, 16 ft grain → ~3,273 bushels.

Cone bottom?

Add the cone volume (⅓ π r² × cone height) for a hopper bin.