Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Climate
Evapotranspiration Calculator
Estimate monthly potential evapotranspiration (PET) from average temperature, daylight hours, and days in the month using a simplified Thornthwaite-style formula. Returns millimetres of water lost per month.
Fill in the required fields to see your result.
Climate
Rainfall Intensity Calculator
Compute rainfall intensity by dividing total rainfall by the duration in hours. Returns inches per hour, a standard metric for designing drainage and assessing flood risk.
Fill in the required fields to see your result.
Key differences
| Evapotranspiration Calculator | Rainfall Intensity Calculator | |
|---|---|---|
| Category | Climate | Climate |
| Inputs required | 3 | 2 |
| Result | Potential Evapotranspiration (mm/month) | Rainfall Intensity (inches/hour) |
| What it does | Estimate monthly potential evapotranspiration (PET) from average temperature, daylight hours, and days in the month using a simplified Thornthwaite-style formula. Returns millimetres of water lost per month. | Compute rainfall intensity by dividing total rainfall by the duration in hours. Returns inches per hour, a standard metric for designing drainage and assessing flood risk. |