It is difficult to draw direct equivalencies between qualifications due to the different subject matter and detail that qualifications cover.
Qualifications all have a Level which indicates the difficulty of the qualification. The higher the level, the more difficult the qualification.
Qualifications also have a size, this could be measured in credits or in the time an average person would be expected to take to complete the qualification.
The Gov.UK website provides a list of the different types of qualifications available at each level, and links to compare Scottish or overseas qualifications.
If you have achieved a level 3 qualification (such as Access to Higher Education) with the intention of progressing to Higher Education, you can use the UCAS Tariff Calculator to find out how many points each qualification attracts.
If you are intending to study a qualification to meet the entry requirements for a job or further study, we would always recommend checking with your intended employer or provider that they will accept that particular qualification before you start your studies.