How does the Growing Degree Calculator work?

Record daily max and min temperatures Then: Calculate GDD = (max+min)/2 - base temp Then: Sum daily values across season.

Can you give an example of how to use the Growing Degree Calculator?

Example: Input Max: 28C, min: 18C, base: 10C gives a result of 13 GDD per day (Typical crop needs 2000-3000 GDD).

Is the Growing Degree Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Growing Degree Calculator?

Our Growing Degree Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Growing Degree Calculator

Growing Degree Days (GDD) Calculator

Daily High Temp (F)

Daily Low Temp (F)

Base Temperature (F)

Number of Days

Tracks cumulative heat units to predict crop maturity. Essential for harvest planning.

Difficulty:beginner

References

›Growing degree day — Wikipedia

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Growing Degree Days (GDD) Calculator