Capsicum GDD (Heat Units) Calculator
Calculate growing degree days for capsicum (base 12°C, ~1500 GDD) and estimate days to maturity.
Capsicum, like chilli, has a high base temperature and accumulates heat units slowly in cool weather. GDD = (Tmax + Tmin)/2 − 12°C; accumulate from sowing to predict stages and harvest.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Growers use the free Capsicum GDD Calculator to schedule the crop by accumulated heat units rather than calendar days, improving harvest and stage prediction.
About Capsicum GDD (Heat Units) Calculator
Capsicum develops by accumulated heat, not calendar days. With a base temperature of 12°C and roughly 1500 growing degree days to maturity, daily GDD = (Tmax + Tmin)/2 − 12°C. Capsicum, like chilli, has a high base temperature and accumulates heat units slowly in cool weather. Enter today's temperatures and your accumulated GDD to see today's heat units, the estimated days to maturity at current temperatures, and the progress to harvest.
How to use Capsicum GDD (Heat Units) Calculator
- 1Enter today's max and min temperature.
- 2Optionally enter accumulated GDD since sowing.
- 3Read today's GDD, days to maturity and progress.
Why use Capsicum GDD (Heat Units) Calculator?
- ✓Uses capsicum's base temperature and GDD-to-maturity
- ✓Predicts maturity from heat units, not the calendar
- ✓Tracks progress to harvest
- ✓Free, instant and fully in-browser
Frequently asked questions
What base temperature does capsicum use for GDD?+
About 12°C. Daily growing degree days are the mean temperature minus 12°C, so little development is credited on days below that threshold.
How many GDD does capsicum need?+
Roughly 1500 growing degree days to maturity. Capsicum, like chilli, has a high base temperature and accumulates heat units slowly in cool weather.
Why track heat units instead of days?+
Because temperature drives development: the same GDD total marks the same growth stage whether the season is warm or cool, making GDD a better scheduling tool than days after sowing.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline in the field and your data never leaves the device.
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