Google Map API : Geometry Library is free? : I am using Google-maps Geometry Library,

    google.maps.geometry.spherical.computeDistanceBetween 

It is not available in pricing table anywhere. How google is charging money for the same.

Is it coming under other library like places or distance-matrix?

As far as I searched Geometry library is the individual one. Please help me out with the same.

Thanks in advance.