“12-point scale” and “10-point scale” describe maxima, not complete grading policies. They do not identify the institution, credential level, pass mark, grade bands, course weighting, or recipient calculation.
There is therefore no general 12-to-10 or 12/10-to-4.0 formula.
Compare named policies
The McMaster Registrar documents one institutional 12-point scale. It maps named letter grades to points and calculates GPA with course units.
Mexico's education authority publishes a technical-baccalaureate regulation for a defined education level and period using a 5-to-10 grading range with a minimum passing grade of 6. This example alone cannot represent every Mexican or Latin American record.
The examples show that a “10-point scale” may not even be zero-based. Dividing a grade by 10 and multiplying by another maximum discards the policy.
Record the missing dimensions
| Dimension | Source record A | Source record B |
|---|---|---|
| Institution or authority | ____ | ____ |
| Credential level | ____ | ____ |
| Effective dates or cohort | ____ | ____ |
| Scale range | ____ | ____ |
| Passing grade | ____ | ____ |
| Grade bands or labels | ____ | ____ |
| Credit weighting | ____ | ____ |
| Repeat/failure treatment | ____ | ____ |
Only after these fields are known can a recipient's documented rule be applied.
Proportional rescaling is not equivalence
For illustration:
9 on a 12-point maximum → 9 ÷ 12 × 4 = 3.0
9 on a 10-point maximum → 9 ÷ 10 × 4 = 3.6
These values express relative position between maxima. They do not preserve grade bands, pass marks, or institutional meaning and must not be submitted as official GPAs.
Follow the application
Some recipients allow the original institutional scale. The University of Maryland Graduate School provides one such example. Another recipient may calculate internally or require an evaluation.
Use the exact current instruction rather than a regional label such as “Canadian 12-point” or “Latin American 10-point.”
FAQ
Is a 9 on both scales comparable?
No. The same numeral can have different meanings under different policies.
Is every Canadian 12-point scale McMaster's scale?
No. McMaster is a named institutional example, not a Canada-wide standard.
Can I use proportional rescaling for planning?
Yes, if it is clearly labeled as relative scale position rather than a credential or admissions GPA.