Curve Grades Calculator

Introduction: The Curve Grades Calculator is a useful tool for students and educators looking to apply a curve to a set of grades. Whether you want to adjust scores based on the lowest grade or curve the entire distribution, this calculator makes the process quick and efficient. Enter your original grades, specify the curve percentage, click “Calculate,” and instantly get your curved grades.

Formula: The calculator applies a curve based on the lowest grade in the original set. It calculates the minimum grade, determines the curve amount by a specified percentage, and then adds this curve amount to each original grade. The result is a set of curved grades that maintain the original grade distribution with the desired adjustment.

How to Use:

  1. Enter your original grades, separated by commas, in the “Enter Original Grades” field.
  2. Specify the desired curve percentage in the “Enter Curve Percentage” field.
  3. Click the “Calculate” button to obtain your curved grades.
  4. The result will be displayed in the “Curved Grades” field.

Example: Suppose you have original grades of 85, 90, and 78, and you want to apply a 5% curve. Enter “85, 90, 78” in the grades field and “5” in the curve percentage field. Click “Calculate,” and the curved grades will be displayed.


  1. Q: What does it mean to curve grades? A: Curving grades involves adjusting scores to account for the difficulty of an exam or assignment, typically by raising all scores or a specific range of scores.
  2. Q: How is the curve percentage determined? A: The curve percentage is a user-specified value that represents the percentage by which the lowest grade will be increased.
  3. Q: Can I use negative curve percentages to lower grades? A: Yes, entering a negative curve percentage will decrease the grades rather than increase them.
  4. Q: What happens if I enter non-numeric characters in the grades field? A: The calculator will prompt you to enter valid numeric grades.
  5. Q: Can I curve grades individually or apply the curve to the entire set? A: The curve is applied uniformly to each grade in the set.
  6. Q: Is there a limit to the number of grades I can enter? A: No, you can enter as many grades as needed, separated by commas.
  7. Q: What if I enter a curve percentage greater than 100%? A: A curve percentage greater than 100% will result in significant grade increases. Exercise caution to ensure fairness.
  8. Q: Can I use this calculator for letter grades? A: The calculator is designed for numeric grades. Consider converting letter grades to a numeric scale before using.
  9. Q: Is the calculator sensitive to leading or trailing spaces in the input? A: No, leading and trailing spaces are automatically trimmed from the input values.
  10. Q: Can I use this calculator on a mobile device? A: Yes, the calculator is responsive and can be used on both desktop and mobile devices.

Conclusion: The Curve Grades Calculator provides a convenient way to adjust scores and maintain grade distributions. Whether you’re a teacher looking to curve an exam or a student curious about the impact of a curve, this tool offers a quick and accurate solution. Use it to ensure fairness in grading and make informed decisions about score adjustments.

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