GDU Calculator

(1) Enter postal code for field location. (2) Move the green slider to set plant date. Results show total GDUs and Year-To-Year Comparisons change by date. (3) Move the brown sliders to set daily, weekly, monthly or annual accumulations. (4) Click on any graph line for number estimates. (5) Click on any graph bar for daily details.

Benefit: Get field-by-field crop progress and 14-day forecast. See disclaimer.


@ 41.682602, -93.709577 Select Map Location
Unit of Measurement:
Total GDUs Since
To Date
Versus Normal
(+14 days)
Accumulated GDUs
Individual GDUs
Year-To-Year Comparisons From  to 
Season Total GDUs GDUs From Normal
- - -

GDU = Growing Degree Units
CHU = Crop Heat Units

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