How do scores in the A Level compare to grades in other pre-university courses such as the IB Diploma and AP courses in the US?

A Level subject courses are highly regarded as having great depth of study and as being rigorous and challenging. As individual courses, the highest A Level subject grade of A* has a UCAS tariff point score of 56 which equates to an IB HL score of 7. The table further illustrates this.