Grain Bin Capacity Calculator
Fill in the values and the answer updates as you type.
How the Grain Bin Capacity Calculator works
The cylinder volume is π × radius² × grain depth at the wall, and the peak on top is a cone with one third of the volume of a cylinder of the same base and height: π × radius² × peak height ÷ 3. One US bushel fills about 1.2445 cubic feet, and weight = bushels × test weight ÷ 2,000 for short tons. Enter a peak height of 0 for a level fill. Grain settles and packs, so a real bin often holds slightly more than the first estimate. Corn is 56 lb/bu, wheat and soybeans are 60 lb/bu, and oats are 32 lb/bu. Example: with Bin diameter 30 ft, Grain depth at the wall 24 ft, Height of the grain peak above the wall 6 ft, and Test weight 56 lb/bu, the result is Bin capacity (bushels) = 14,768; Grain volume (cu ft) = 18,378; Grain weight (short tons) = 413.5.
Inputs and results
The Grain Bin Capacity Calculator takes 4 inputs and gives 5 results.
What you enter
- Bin diameter (ft) — starts at 30.
- Grain depth at the wall (ft) — starts at 24.
- Height of the grain peak above the wall (ft) — starts at 6.
- Test weight (lb/bu) — starts at 56.
What you get
- Bin capacity (bushels)
- Grain volume (cu ft)
- Grain weight (short tons)
- Grain weight (metric tonnes)
- Bushels in the peak
Example: Grain Bin Capacity Calculator with the starting values
With bin diameter 30 ft, grain depth at the wall 24 ft, height of the grain peak above the wall 6 ft and test weight 56 lb/bu, the calculator returns:
| Bin capacity (bushels) | 14,768 |
|---|---|
| Grain volume (cu ft) | 18,378 |
| Grain weight (short tons) | 413.5 |
| Grain weight (metric tonnes) | 375.1 |
| Bushels in the peak | 1,136 |
Change any value above and the results update straight away.
Grain Bin Capacity Calculator FAQ
How do I use the Grain Bin Capacity Calculator?
Enter bin diameter, grain depth at the wall, height of the grain peak above the wall and test weight in the fields, then read bin capacity (bushels), grain volume (cu ft), grain weight (short tons) and grain weight (metric tonnes) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Grain Bin Capacity Calculator calculate?
Bushels and tons a round grain bin holds. It returns bin capacity (bushels), grain volume (cu ft), grain weight (short tons) and grain weight (metric tonnes) from the 4 values you provide.
What values does the Grain Bin Capacity Calculator start with?
It opens with bin diameter 30 ft, grain depth at the wall 24 ft, height of the grain peak above the wall 6 ft and test weight 56 lb/bu so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Grain Bin Capacity Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Grain Bin Capacity Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.