Biology

Growing Degree Units Calculator

Find growing degree units for a day.

Calculated Output

Growing degree units (GDU) 22.5

Formula: GDU = (Tmax + Tmin)/2 − base (min 0)

Step-by-Step Breakdown

1. Values used:

2. Daily high = 85 °F

3. Daily low = 60 °F

4. Base temperature = 50 °F

6. Growing degree units = 22.5GDU

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The math behind it

GDU = (daily high + daily low) ÷ 2 − base temperature, never below zero. Corn uses a 50 °F base.

High 85, low 60, base 50 → 22.5 GDU.

Why track?

Crop stages occur at predictable cumulative GDU totals.