1 foot=12 inch, so for five feet, 5x12=60 inch , by adding 4 inch
60+4=64 inch,
1 inch=2.54 cm
64*2,54=162.56 cm(exact height)
I usually round 2.54 cm down to 2.5 to be practical in a height calculation, thus five-foot-four means (to me) 1 meters 60 centimeters or simply 1.60 m(or 160cm.) .
PS:1 foot=30.48 cm, I round this down to 30 cm. So the simple calculation is;
30x5+4x2.5=160 cm=1.6 m
I'm used to calculating this way but for any official record where being exact is important, It would be
162 or 163 cm.(rounding up or down is up to you)