bash proj4

echo "-436231.78 -1133608.56" | cs2cs -f "%.10f" +init=esri:102067 +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56 +to +init=epsg:4326
18.7939443539   49.5737863847 41.9206952797

echo "-436231.78 -1133608.56" | cs2cs -f "%.10f" +proj=krovak +ellps=bessel +nadgrids=jezek_czech08.llb +to +proj=longlat +datum=WGS84
18.7939504934   49.5737917878 0.0000000000

http://geographiclib.sourceforge.net/cgi-bin/GeodSolve?type=I&input=%0949.5737917878+18.7939504934%2C+49.5737863847+18.7939443539%09&format=g&azi2=f&prec=3&radius=6378137&flattening=1%2F298.257223563&option=Submit

0.747