Free calculator · No signup
Grain Moisture Shrink Calculator
Convert wet bushels at harvest to dry bushels at market moisture, and see total shrink.
Your numbers
Result
How it's calculated
Dry bushels = wet bushels × (100 − harvest moisture) ÷ (100 − market moisture), then reduced by a small handling (invisible) shrink for the fines and dust lost in drying and handling.
The water-only part is the physical loss of removing moisture; the handling factor (often 0.5–1.0%) covers the rest. Elevators apply their own shrink schedule — this shows the physics so you can compare.
Row Wise tracks harvest timing and yield by field, so you know what's coming out of each one and when it's fit to cut.
Get notified at launch →Frequently asked questions
How is grain shrink calculated?
Shrink converts a wet weight down to the equivalent dry weight at market moisture. The water removed is (harvest − market) moisture points; a handling factor adds the dust and fines lost in the process.
What market moisture should I use?
Corn is typically sold at 15%, grain sorghum at 14%, wheat around 13.5% and soybeans at 13%. Use the preset buttons to load these, then match your buyer's contract.
Why is my elevator's shrink higher than the physical shrink?
Buyers add a shrink factor (often ~1.25–1.4% per point) plus drying charges that exceed the pure water loss. This tool shows the physical baseline so you can see the difference.