Growing Degree Day Calculator

Calculate GDD accumulation for crop maturity prediction from daily high/low temperatures.

Daily High (°F)

Daily Low (°F)

Base Temp (°F)

Upper Cutoff (°F)

Days Elapsed

Crop Type

Today's GDD

Accum. GDD

GDD to Maturity

Days to Maturity

Corn, Soybeans: 50°F (10°C)

Wheat, Barley: 40°F (4.4°C)

Cool-season grass: 32°F (0°C)

Related Calculators

Frost probability.

ET crop water demand.

Rain harvesting.

Relative humidity.

Temperature units.

Solar irradiance.