Earth currently has an axial tilt of about 23.4 °. This value remains about the same relative to a stationary orbital plane throughout the cycles of axial precession. But the ecliptic (i.e., Earth 's orbit) moves due to planetary perturbations, and the obliquity of the ecliptic is not a fixed quantity. At present, it is decreasing at a rate of about 47 '' per century (see details in Short term below).
how much is the tilt of the earth's axis
about 23.4 °