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Calcimator

Yield Monitor Calibration Calculator

Calibrate your combine yield monitor using weigh-wagon load weights and moisture correction.

Inputs

lbs
ft
ft
%
%

Results

Yield (Bushels/Acre)

114.4 bu/ac

Calibration Factor

0.97

Harvested Area1.82 acres
Moisture-Corrected Weight11,645 lbs
Yield (Lbs/Acre)6,404.7 lbs/ac
How to Use This Calculator
  1. Enter Load Weight, Header Width, and Pass Distance.
  2. Set Actual Grain Moisture and Standard Moisture.
  3. Review Yield (Bushels/Acre) (bu/ac) and Calibration Factor.
  4. Use Harvested Area (acres) and Moisture-Corrected Weight (lbs) to inform your decision.
  5. Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with Header Width

Header WidthYield (Bushels/Acre)Calibration Factor
9.6357.4 bu/ac0.97
24143 bu/ac0.97
4085.8 bu/ac0.97
5463.5 bu/ac0.97

What each input means

Load Weight
Actual weight of the harvested load from scale or weigh wagon.
Header Width
Combine header cutting width.
Pass Distance
Length of the calibration pass (half mile = 2640 ft).
Actual Grain Moisture
Moisture content of grain as harvested.
Standard Moisture
Market standard moisture (corn 15.5%, soybeans 13%, wheat 13.5%).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Load Weight = 12000, Header Width = 30, Pass Distance = 2640, Actual Grain Moisture = 18 = 5 input(s) provided
  2. Calculate Yield
    Yield
    114.4 = 114.4
  3. Calculate Calibration Factor
    Calibration Factor
    0.97 = 0.97
  4. Calculate Harvested Area
    Harvested Area
    1.818 = 1.818
  5. Calculate Moisture-Corrected Weight
    Moisture-Corrected Weight
    11645 = 11645

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