Biology & Life Science

Instant, private, and free

Grain Bin Calculator.

Calculate geometric bin volume and optional mass from bulk density.

On-device calculationNo signup
01

Set your values

Results update as you type.

Cylinder volume: 226.194671 m³

Cylinder volume

226.194671m³
Roof volume: 18.849556 m³

Roof volume

18.849556m³
Total bin volume: 245.044227 m³

Total bin volume

245.044227m³
Estimated mass: 183,783.170235 kg

Estimated mass

183,783.170235kg

Educational arithmetic only. Enter measured values and keep units consistent. No crop, feed, veterinary, or experimental recommendation is inferred.

Use Cases

Estimate grain storage capacity

Determine the total volume of a grain bin to plan storage needs or compare with grain quantities.

Example: A bin with 10 m diameter, 8 m straight-wall height, and 3 m roof height has a volume of about 628 m³.

Calculate grain mass for logistics

Use bulk density to estimate the weight of grain in the bin, useful for transport or inventory.

Example: With a bulk density of 720 kg/m³, the same bin holds about 452,000 kg of wheat.

Frequently Asked Questions

How does the Grain Bin Calculator compute volume?
It calculates the volume of the cylindrical straight-wall section using the bin diameter and straight-wall height, then adds the volume of the conical roof (or hopper) using the conical roof height. The total is the geometric bin volume.
What is the optional bulk density used for?
If you enter a bulk density in kg/m³, the calculator multiplies the total volume by that density to estimate the mass of grain (or other material) the bin can hold. Leave it blank to get volume only.
Can I use this for any type of grain?
Yes, as long as you know the bulk density of the specific grain (e.g., wheat, corn, soybeans). The calculator uses the density you provide to estimate mass, so it works for any material with a known bulk density.

Tips & Common Mistakes

Tips

  • Measure the straight-wall height from the floor to the eave, not including the roof.
  • For the conical roof height, measure from the eave to the peak of the roof.
  • Use consistent units: enter diameter and heights in meters, and bulk density in kg/m³.
  • If you don't know the bulk density, leave it blank to get volume only, then multiply by a typical density later.

Common Mistakes to Avoid

  • Using the total height (including roof) as the straight-wall height, which overestimates volume.
  • Entering diameter in feet but heights in meters, causing unit mismatch.
  • Forgetting that the roof is a cone, not a cylinder, so its volume is one-third of a cylinder's volume.

Last updated: August 13, 2026