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/d)

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

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