Evapotranspiration Calculator
Calculate Reference evapotranspiration (ETo) according to FAO standards
Latitude (Decimals)
Elevation (m)
Date
Temperature (Min)
Temperature (Max)
Temperature (Dewpoint)
Temperature (Dry)
Temperature (Wet)
RHmin
RHmax
RHmean
Wind Speed (m/s)
Wind Speed height (m)
Sunlight Hours
Radiation
ETo (mm/day)
ET Value
| Tmean | Dewpoint | J | |||
|---|---|---|---|---|---|
| P | γ | Δ | |||
| δ (rad) | dr | φ | |||
| ωs | Ra | N | |||
| e°(Tmin) | e°(Tmax) | e°(Tmax) | |||
| es | e°(Tdew) | ea | |||
| es-ea | Rso | Rs | |||
| Rns | Rnl | Rn | |||
| u2 | |||||
| Tdew | Twet | Tdry | RHmin | RHmax | RHmean |
Explore our new tool, ETo Tracker, to know the Reference Evapotranspiration value specific to your location.
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