Grain Moisture Shrink Calculator
Works out what grain will weigh once it has dried.
Weight after drying
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Water removed —
Total shrink — %
Water shrink per point — %
Reading this —
The formula
dry weight = wet weight × (100 − starting moisture) ÷ (100 − target moisture)
The dry matter stays the same when grain dries, and only the water changes. Moisture here is on the wet basis, the usual convention in the grain trade.
What to watch out for
A contract may use its own shrink factor, which often adds a handling allowance on top of the water, so check the terms before comparing.
Frequently Asked Questions
How much does grain shrink per point of moisture?
Drying to 15%, the water shrink is 1.176% per point of the wet weight.
What do 100 t at 20% weigh at 15%?
94.12 t.