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Growing Degree Units (GDU) Calculator

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Calculates accumulated growing degree units (GDUs), which are used to estimate crop development rates based on temperature data.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Minimum Daily Temperature, Maximum Daily Temperature, and Base Temperature in the units shown.

Step 2

Read Average Daily Temperature and Growing Degree Units in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Corn

Minimum Daily Temperature: 12 celsius; Maximum Daily Temperature: 30 celsius; Base Temperature: 10 celsius

Average Daily Temperature: 21 celsius; Growing Degree Units: 11 gdu

Wheat

Minimum Daily Temperature: 8 celsius; Maximum Daily Temperature: 25 celsius; Base Temperature: 5 celsius

Average Daily Temperature: 16.5 celsius; Growing Degree Units: 11.5 gdu

Soybeans

Minimum Daily Temperature: 12 celsius; Maximum Daily Temperature: 28 celsius; Base Temperature: 10 celsius

Average Daily Temperature: 20 celsius; Growing Degree Units: 10 gdu

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