Evapotranspiration intensities as well as evapotranspiration totals of the Slovak territory differ according to surface characteristics, meteorological conditions and soil water regime. Precipitation - evapotranspiration ratio is 768/494 mm of water layer for the Slovak territory, what means, that approximately 2/3 of precipitation total is lost by evapotranspiration. Accidentally, this is the same ratio as it was estimated for the whole Earth. Only 271 mm thick layer of water can be later used as surface water. Daily totals of evapotranspiration over Slovakia are below 7 mm (with probability 99 %) and usually they are below 4 mm/day (with probability 90 %). Evapotranspiration intensities of all green and dense canopies under identical conditions are close, but forests annual evapotranspiration totals are higher at about 10 % due to evaporation of intercepted water.