CMA

Agriculture

Corn Moisture Adjustment Calculator

Translate wet grain to dry matter, target-moisture weight, handled market weight, bushels, drying cost, and net value.

Wet grain weight (lb)Initial moisture (%)Target moisture (%)Additional handling shrink (%)Price per market bushelStandard bushel weight (lb)Drying cost per moisture point per bushel

Dry matter in wet grain (lb)-

Equivalent weight at target moisture (lb)-

Weight after entered handling shrink (lb)-

Market bushel equivalent (bu)-

Moisture percentage points removed-

Gross value before drying cost-

Entered per-point drying cost-

Gross value less entered drying cost-

Decision view

Corn moisture mass-flow diagram

Corn moisture mass-flow diagramDry matter is preserved while water and handling losses remain explicit.

Exact scenario comparisonTarget moisture (%) changes while all other entered assumptions remain constant.

Target moisture (%)	Dry matter in wet grain (lb)	Equivalent weight at target moisture (lb)	Weight after entered handling shrink (lb)	Market bushel equivalent (bu)	Moisture percentage points removed	Gross value before drying cost	Entered per-point drying cost	Gross value less entered drying cost

How to use Corn Moisture Adjustment Calculator

Enter wet weight and both moisture percentages.
Enter handling shrink, bushel basis, price, and drying charge.
Follow the material-flow diagram from wet mass to net value.

Calculator guide

Understanding Corn Moisture Adjustment Calculator

Moisture adjustment must preserve dry matter: removing water changes gross weight but not the dry solids used to derive target-moisture equivalent weight.

Find dry matter At 20% moisture, 80% of the entered wet weight is dry matter.

Restore target-moisture weight Dividing by the 84.5% target dry fraction adds the target water portion back.

Apply handling shrink Handling shrink occurs after moisture equivalence in this model.

Convert to bushels and points The bushel conversion uses the separately entered standard weight.

Calculation method

How the calculation works

Preserve dry matter in a corn-moisture calculation while translating wet weight to a target-moisture equivalent, then apply handling shrink and the entered drying-cost basis. Multiply wet weight by its dry fraction, divide by the target dry fraction, apply handling shrink, then convert pounds to market bushels.

Detailed calculation process

Preserve dry matter through corn moisture adjustment

The default starts with 56,000 lb at 20% moisture, targets 15.5%, applies 0.5% handling shrink, uses 56 lb/bu, $4.75/bu, and $0.045 per point-bushel.

General formula: DM = W(1-M_i/100)W_t = DM/(1-M_t/100)W_m = W_t(1-s/100)B = W_m/w_bPoints = max(M_i-M_t,0)C_d = B(Points)cV_net = Bp-C_d Dry matter is invariant during the moisture conversion. Handling shrink is a later, separate reduction; pricing and drying cost use the resulting market-bushel equivalent.

What each symbol means

W, DM Wet grain weight and dry matter (lb).

M_i, M_t Initial and target moisture (% wet basis).

W_t, W_m Target-moisture and post-handling weights (lb).

s Additional handling shrink (%).

w_b, B Standard bushel weight (lb/bu) and market bushels.

c, p Drying cost ($/point-bu) and price ($/bu).

Worked substitution with the default inputs

1. Find dry matter DM = 56,000(1-20/100)DM = 44,800 lb At 20% moisture, 80% of the entered wet weight is dry matter.

2. Restore target-moisture weight W_t = 44,800/(1-15.5/100)W_t = 53,017.751 lb Dividing by the 84.5% target dry fraction adds the target water portion back.

3. Apply handling shrink W_m = 53,017.751(1-0.5/100)W_m = 52,752.663 lb Handling shrink occurs after moisture equivalence in this model.

4. Convert to bushels and points B = 52,752.663/56 = 942.012 buPoints = max(20-15.5,0) = 4.5 The bushel conversion uses the separately entered standard weight.

5. Reconcile value and drying cost Gross = 942.012(4.75) = $4,474.556C_d = 942.012(4.5)(0.045) = $190.757V_net = $4,283.799 Gross value minus entered drying charge matches the displayed net value.

The default preserves 44,800 lb dry matter and yields 942.012 market bushels with $4,283.80 net modeled value.

Purpose-built visual

Moisture mass-flow diagram

A Sankey-style material path preserves dry solids, separates removed water and handling loss, and ends at market weight.

Live inputs Every plotted quantity is recalculated from the current form values.

Decision context Reference lines and endpoints retain their actual units.

Reconciliation The visual and calculation steps close to the displayed result.

Worked situations

Practical examples

The default starts with 56,000 lb at 20% moisture, targets 15.5%, applies 0.5% handling shrink, uses 56 lb/bu, $4.75/bu, and $0.045 per point-bushel.
The default preserves 44,800 lb dry matter and yields 942.012 market bushels with $4,283.80 net modeled value.

Better inputs

Useful tips

Change one assumption at a time and compare the live result and visual.
Keep all entered quantities on the units stated beside their fields.
Retain extra precision through intermediate steps and round only reported results.

Before relying on the result

Limitations and common mistakes

Elevator shrink schedules, test weight, grading, spoilage, temperature, and contracts vary.
The model uses wet-basis moisture percentages.
A standard-weight bushel is a pricing conversion, not a physical volume measurement.

Reference

Key terms

Dry matter: Grain mass excluding water.
Moisture point: One percentage-point difference in moisture.
Handling shrink: Additional entered weight loss after moisture adjustment.

Important note

Calculated from the entered field and production values. Confirm seed-lot data, equipment calibration, labels, local conditions, and applicable agronomic guidance.

Frequently asked questions

Why divide by the target dry fraction?

Target weight contains the same dry matter plus a smaller allowed water fraction.

Can target moisture exceed initial moisture?

Yes mathematically, but drying points are floored at zero.

Is test weight modeled?

Only through the entered pounds-per-bushel conversion.

Does handling shrink equal water loss?

No. It is a separate entered adjustment.