🔢 Score to Grade Calculator
Dutch schools have used the linear correction model for decades to convert test scores into grades between 1 and 10. This model ensures fairness: 0% always scores a 1 (the lowest grade), and 100% always a 10 (the highest). For every percentage in between, the scale is perfectly linear. It is especially popular in secondary education (havo, vwo and vmbo) and many universities. Use this calculator to quickly convert your test score to the final grade, with all intermediate steps visible.
Formula
Grade = 1 + 9 × (score ÷ max score)
This linear model, also called the correction model or 1+9p model, converts the percentage correct (score divided by the maximum) into a grade on the 1-to-10 scale. The number 1 is the minimum starting value (ensures that even 0% yields a 1), and 9 is the multiplier for the percentage. At 0% you get exactly a 1 (the lowest grade), and at 100% exactly a 10. It is the most common system in Dutch secondary education, except for some schools that apply an N-term or other model. The simplicity and predictability make it widely trusted.
Steps
- 1Enter the number of points achieved. This is your raw test score (e.g., 75 points).
- 2Enter the maximum number of points possible. This is the total possible score of the test (e.g., 100 points).
- 3Calculate your percentage by dividing the score by the maximum. This gives the fraction of correct answers.
- 4Apply the formula: Grade = 1 + 9 × percentage. This gives your final grade on the 1-10 scale, sometimes rounded to one decimal place.
Percentage to grade (linear 1+9p model)
| Percentage correct (%) | Grade | Classification |
|---|---|---|
| 0–10% | 1.0–1.9 | Very poor |
| 10–20% | 1.9–2.8 | Poor |
| 20–35% | 2.8–4.2 | Fair |
| 35–55% | 4.2–5.95 | Inadequate |
| 55–70% | 5.95–7.3 | Pass |
| 70–85% | 7.3–8.65 | Good |
| 85–95% | 8.65–9.55 | Very good |
| 95–100% | 9.55–10.0 | Excellent |
Based on the linear 1+9p correction model; individual schools may differ. Rounding rules may vary by school.
commonMistakes
- Assuming 50% score gives a 5. Under the linear model it is 1 + 9 × 0.5 = 5.5, not 5. This is a common expectation error.
- Forgetting that 0 points still gives a grade of 1, not a 0; the Dutch grading system has no grade 0. This prevents complete failure from being recorded as zero.
- Assuming this linear model is used everywhere. Some schools apply an N-term, others use a completely different correction model. Always ask your teacher which model your school uses.
- Not knowing how to apply rounding rules. A 5.95 may round to 6, but 5.94 should not—check your school's rules. Teachers sometimes use different conventions.
useCases
- Checking your own test before the official result is out. This gives you insight into your performance and potential areas for improvement.
- As a teacher, quickly converting a full class's scores into final grades, with consistency across all subjects.
- Finding out how many more points you still need for a pass (5.5), good (7.0), or even an 8.0.
- Understanding how tests and exam results are calculated, so you better understand how your grade report is compiled.