THE FEUTEX TOOLKIT

Garden Growing Degree Day

Calculate one day of temperature accumulation above a user-chosen base and add it to a seasonal total.

Gardening workspace● Runs in your browser

01 Your input

Daily maximum temperature°CDaily minimum temperature°CCrop model base temperature°CPrevious accumulated degree days°C·days

02 Your result

View or copy raw result data

Result data

FormulaDaily degree days = Math.max(0,(high+low)/2-base); Accumulated degree days = prior+Math.max(0,(high+low)/2-base)

Sources and model references

Made for real tasks

Calculate one day of temperature accumulation above a user-chosen base and add it to a seasonal total.
Compare an alternative set of measurements without uploading personal data.

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

Enter daily maximum temperature, daily minimum temperature, crop model base temperature, and previous accumulated degree days in the displayed units.
Calculate and use each labeled result for garden growing degree day. Compare the result with a measured sample before committing materials.

{
  "high": 24,
  "low": 10,
  "base": 5,
  "prior": 120
}

Simple average method without upper/lower temperature caps. Enter the base specified by your crop model; this does not predict a harvest date.

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.