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Calcimator

Grain Bin Aeration Calculator

Calculate fan CFM requirements, static pressure, and horsepower for grain bin aeration based on bin size, grain depth, and target airflow rate.

Inputs

ft
ft
CFM/bu
%

Results

Required Fan CFM

1,636 CFM

Estimated Fan HP0.4 HP
Static Pressure0.9 in. WC
Bin Capacity16,358 bushels
CFM per Sq Ft Floor1.61
Est. Annual Electricity$6.91
How to Use This Calculator
  1. Enter grain type, moisture content, and bin capacity in bushels.
  2. Set fan CFM per bushel and target grain temperature.
  3. Input outside air temperature and relative humidity.
  4. Review aeration runtime hours and estimated cooling time to reach target temperature.
  5. Use these to set aeration fan run-time schedules and prevent storage loss.
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