Managing multiple grading scales after changing majors

Changing majors — or transferring between programmes — can leave you with coursework graded on different scales. The key to a coherent CGPA is to convert everything to one common scale before averaging.

The principle

You cannot average raw numbers from different scales directly — an 8 on a 10-point scale is not comparable to a 3 on a 4.0 scale. First express each course's grade as grade points on a single chosen scale, then credit-weight as usual.

How to do it

• Pick a target scale — usually the one your current programme uses.
• Convert each course's grade to that scale. For point-to-point conversions, the scale converter handles same-direction scales.
• Credit-weight the converted grades in the CGPA calculator to get one combined figure.

Check your institution's method

Your university has its own rule for combining mixed-scale records — some recompute everything on the new scale, some keep programmes separate. The official CGPA on your transcript follows that rule, so confirm it rather than assuming your combined figure matches.

When in doubt, separate

If the scales are genuinely incompatible (for example an inverted scale in the mix), report each segment on its own scale rather than forcing a single misleading number, and let evaluators combine them.

The averaging mistake that inflates or deflates you

The single biggest error after a major change is averaging raw numbers from different scales — treating an 8/10 and a 3.0/4.0 as if they sit on the same ruler. They don't. Always convert every course to one chosen scale first, then credit-weight. Skipping the conversion step can swing your combined figure by a full grade in either direction.

Key takeaways

• Never average grades from different scales directly — convert to one scale first.
• Pick a target scale (usually your current programme's), convert, then credit-weight.
• Use the scale converter for same-direction point-to-point conversions.
• If scales are genuinely incompatible, report each segment separately rather than forcing one number.