Grain bin geometric capacity calculator

Calculate cylindrical filled volume and conical grain peak volume with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use cylindrical filled volume and conical grain peak volume to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Circular bin internal diameter (m)
4
Filled cylindrical height (m)
3
Additional conical grain peak height (m)
1
Measured bulk density (kg/m³)
700
Cylindrical filled volume (m³)
37.699112
Conical grain peak volume (m³)
4.18879
Total geometric grain volume (m³)
41.887902
Estimated stored mass (kg)
29,321.531434

Try another scenario

Circular bin internal diameter (m)
2
Filled cylindrical height (m)
2
Additional conical grain peak height (m)
0
Measured bulk density (kg/m³)
500
Cylindrical filled volume (m³)
6.283185
Conical grain peak volume (m³)
0
Total geometric grain volume (m³)
6.283185
Estimated stored mass (kg)
3,141.592654
Calculation method

Calculation method

Cylindrical filled volume (m³)

π × (diameter/2)² × filled cylinder height.

Conical grain peak volume (m³)

π × (diameter/2)² × grain peak height / 3.

Total geometric grain volume (m³)

Sum cylinder and grain peak volumes.

Estimated stored mass (kg)

Total volume × measured bulk density.

Symbols and units
a
Circular bin internal diameter (m)
b
Filled cylindrical height (m)
c
Additional conical grain peak height (m)
d
Measured bulk density (kg/m³)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Ideal upright cylinder with an optional conical GRAIN peak, not the empty roof space. Excludes aeration ducts, hoppers, compaction and grain bridging. Density is supplied from measurement; structural capacity is not assessed.
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Further reading

OpenStax: arithmetic and geometry ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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