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GDU Calculator — Growing Degree Units — Free Online Tool
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GDU Calculator — Growing Degree Units

Calculate daily heat units for crop development and maturity staging

Formula: GDU = [(Tmax + Tmin) / 2] − Tbase. Standard corn calculation applies upper and lower temperature bounds (max capped at 86°F / 30°C, min floored at 50°F / 10°C).
Temperature & Crop Inputs

Calculation Results

⚠️ Growing Degree Units (GDU) provide an estimation of physiological development for agricultural planning. Actual crop maturity can vary based on soil moisture, hybrid maturity ratings, daylight hours, and stress factors. Consult local agricultural extension services for precise regional crop models.

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