How much is the honors and AP/IB bonus worth?
Honors adds +0.5 point and AP or IB add +1.0 point to that course letter-grade points, always capped at a maximum of 5.0 per course.
Is the 0.5/1.0 bonus standard across every school?
No. The +0.5 bonus for honors and +1.0 for AP/IB, capped at 5.0, is the most widely used convention, but each school can adopt different values, some use a 4.5 scale instead of 5.0. Confirm your school's own convention before comparing the number against another institution's.
Does the weighted GPA replace the 4.0 GPA?
No, both coexist: the 4.0 GPA is the universal reference used for comparison across schools, while the weighted GPA only exists as an additional number once some course has honors or AP.
Why is there a 5.0 cap?
To stop the bonus from pushing a single course result to an unbounded value, 5.0 is the conventional cap used by most schools that adopt this kind of weighted scale.