Grade Conversion Guide — All Grading Scales Explained
Complete guide to converting grades between different scales: 0-10, 0-20, 0-100, 1.0-7.0, 0-5, and GPA 4.0. Free conversion tables and calculator.
Most Common Grading Scales
Different countries and educational systems use different grading scales. The most common ones are:
- 0-10: Used in Spain, Mexico, Costa Rica, Ecuador
- 0-20 (vigesimal): Used in Peru, Venezuela, Dominican Republic
- 0-100: Used in Bolivia, Dominican Republic
- 1.0-7.0: Used in Chile
- 0-5: Used in Colombia
- GPA 0.0-4.0: Used in the United States and many international universities
- 1-10: Used in Argentina
Quick Conversion Table
| 0-10 | 0-20 | 0-100 | 1.0-7.0 | 0-5 | GPA 4.0 |
|---|---|---|---|---|---|
| 10 | 20 | 100 | 7.0 | 5.0 | 4.0 |
| 9 | 18 | 90 | 6.4 | 4.5 | 3.6 |
| 8 | 16 | 80 | 5.8 | 4.0 | 3.2 |
| 7 | 14 | 70 | 5.2 | 3.5 | 2.8 |
| 6 | 12 | 60 | 4.6 | 3.0 | 2.4 |
| 5 | 10 | 50 | 4.0 | 2.5 | 2.0 |
Conversion Formulas
To convert between linear scales, use the rule of three:
From 0-10 to GPA 4.0: GPA = (Grade × 4) ÷ 10
From 0-20 to 0-10: Grade = Score ÷ 2
From 0-100 to 0-10: Grade = Score ÷ 10
From 1.0-7.0 to 0-10: Grade = (Score - 1) × 10 ÷ 6
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