Grain Bin / Silo Capacity Calculator
Calculate the grain-holding capacity of a round bin or silo in tonnes from its dimensions.
Round-bin capacity = π × radius² × grain depth × bulk density. Bulk (test) density differs by grain — wheat ~770, paddy ~575, maize ~720 kg/m³. Don't fill to the very top; leave headspace for aeration and to avoid spillage.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers, traders and warehouse keepers use the free Grain Bin / Silo Capacity Calculator for an accurate answer in seconds — no formulas to remember, works offline at the store.
About Grain Bin / Silo Capacity Calculator
Sizing storage — or valuing what's in a bin — starts with its capacity in tonnes, which depends on the bin's dimensions and the grain's bulk (test) density. This tool computes a round bin or silo's capacity from its diameter, grain depth and the grain's density (wheat is far denser than paddy, so the same bin holds very different tonnages). Remember to leave headspace above the grain for aeration airflow and to prevent spillage.
How to use Grain Bin / Silo Capacity Calculator
- 1Enter your grain/store figures into the inputs.
- 2Read the headline result and the supporting breakdown.
- 3Apply the guidance in the note to your storage decisions.
Why use Grain Bin / Silo Capacity Calculator?
- ✓Uses the standard, citable storage/drying formula
- ✓Clear inputs with sensible defaults
- ✓Instant result with the working shown
- ✓Free, fully in-browser and private
Frequently asked questions
How do I calculate grain bin capacity in tonnes?+
Capacity = π × radius² × grain depth × bulk density ÷ 1000. A 4 m diameter bin with 5 m of wheat (770 kg/m³) holds about 48 tonnes. Use the correct bulk density for your grain.
Does the type of grain change bin capacity?+
Yes — capacity in tonnes depends on bulk density, which varies a lot: wheat ~770, maize ~720, paddy ~575 kg/m³. The same bin volume holds far more wheat than paddy, so always use the right density.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline at the store/godown and your data never leaves the device.
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