Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Climate
Solar Radiation Calculator
Estimate top-of-atmosphere solar irradiance at solar noon for a given latitude, day of year, and solar declination. Returns watts per square metre on a horizontal surface, before atmospheric attenuation.
Fill in the required fields to see your result.
Climate
Growing Degree Days Calculator
Compute daily Growing Degree Days (GDD) by subtracting a crop-specific base temperature from the average of the day's max and min temperatures. Use accumulated GDD to predict crop development stages.
Fill in the required fields to see your result.
Key differences
| Solar Radiation Calculator | Growing Degree Days Calculator | |
|---|---|---|
| Category | Climate | Climate |
| Inputs required | 3 | 3 |
| Result | Solar Radiation (W/m²) | Growing Degree Days (GDD) |
| What it does | Estimate top-of-atmosphere solar irradiance at solar noon for a given latitude, day of year, and solar declination. Returns watts per square metre on a horizontal surface, before atmospheric attenuation. | Compute daily Growing Degree Days (GDD) by subtracting a crop-specific base temperature from the average of the day's max and min temperatures. Use accumulated GDD to predict crop development stages. |