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Grain Moisture Shrink Calculator

Conserve dry matter when reducing wet-basis moisture, then subtract an explicitly based handling deduction from the theoretical dried mass.

95 / DECLARE THE SHRINK BASIS

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Starting values are illustrative. Use your own costs, rates and assumptions.

INPUT GROUP 01

Wet-basis mass and moisture

Check the assumptions before acting on a result.

Read the method and example

YOUR CALCULATION

Conserve dry matter for water removal, then apply a separately based handling deduction.

Dry matter before handling (tonnes)

13.6

Theoretical mass at target moisture (tonnes)

16

Water-only mass reduction (tonnes)

1

Handling deduction on original wet mass (tonnes)

0.17

Mass after drying and handling deduction (tonnes)

15.83

Total mass reduction from original wet mass

6.88%

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Illustrative inputs loaded. Replace them with your own assumptions.

How the grain moisture shrink calculator works

Initial dry matter is original wet mass times one minus initial wet-basis moisture fraction. Water-only mass at target moisture equals that dry matter divided by one minus target moisture fraction. Target moisture cannot exceed initial moisture and neither can be 100%.

Water removed is original mass less theoretical target-moisture mass. Additional handling deduction is the entered percentage of ORIGINAL wet mass, subtracted afterward. A deduction exceeding the theoretical dried mass is rejected. This declared bulk-mass allowance is separate from the dry-matter-conserving water calculation.

Total shrink percentage uses the original wet mass denominator and is unavailable at zero mass. This does not reproduce a buyer’s commercial shrink schedule or recommend drying, storage moisture, handling practice or grade. Actual handling loss and settlement conventions need their own evidence.

Worked example

17 tonnes at 20% moisture contain 13.6 tonnes of dry matter. At 15% target moisture, that corresponds to 16 tonnes before handling, so one tonne of water is removed. A 1% deduction on the original 17 tonnes removes another 0.17 tonne, leaving 15.83 tonnes. With zero handling deduction, 16 tonnes remain.

Sources and assumptions

The source material explains the underlying calculation or pricing structure. Entered prices, costs, schedules and scenario choices are your assumptions; this tool does not obtain supplier quotes or predict actual results.

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  • Grain Storage Cost

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