Growing Degree Days
Calculate Growing Degree Days instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Growing Degree Days
Tmax, °C
Tmin, °C
T base
GDD
10
More about: Growing Degree Days
What it calculates
The “Growing Degree Days” calculator computes GDD from 3 parameters: tmax, °c, tmin, °c, t base.
A handy everyday calculator for daily tasks.
Example calculation
With parameters Tmax, °C = 25, Tmin, °C = 15, T base = 10 the result is 10.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.