Nucleofugality and electrofugality represent the reactivity of leaving groups which develop in heterolysis reactions. When neutral substrate undergoes solvolysis, nucleofuge is a leaving group that departs with an electron pair and becomes anion, while electrofuge gives its electrons over and becomes cation. Their quantification was made possible by an equation proposed by Mayr and coworkers at the beginning of 21st century (log k (25 °C) = sf (Nf + Ef)) in which nucleofugality is described with Nf and sf parameters and electrofugality with Ef parameter. Correlation enables semiquantitative estimation of solvolysis rate constants (and half-life) which is important in everyday laboratory practice for evaluation of substrate stability in solvents, and nucleofugality parameters alone made possible mutual comparison of leaving group reactivities of different structures in a certain solvent. This paper shows comprehensive nucleofugality scale comprised of all experimentaly obtained and calculated nucleofugality values in chosen organic solvents and their mixtures with water which have been published so far. The construction of the scale alone and determination of experimental and calculated nucleofugality values are described as well. Total number of nucleofugality values found by literature review is 1349, of which 310 were determined experimentally and 1039 were calculated. The most reactive leaving groups have proven to be tosylate, mesylate and trinitromethyl carbonate and the least reactive groups are primarily carboxylates. To illustrate wide reactivity range covered by Mayr equation, solvolysis rate constants were calculated for substrates comprised of chosen leaving groups and electrofuge of different reactivities.