Marks Normalization Calculator

Grading on a curve is a method used to adjust scores based on the overall performance of a class. It helps account for variations in exam difficulty and ensures that grades reflect relative performance rather than strict point totals.

A common mathematical approach is to apply a linear transformation using z-scores:z = (x − μ) / σ, then rescale with normalized = μ' + zσ'. This aligns the distribution to a desired mean (μ') and standard deviation (σ').

In real-world grading, instructors may apply caps, floors, or discretionary adjustments to maintain fairness. Always check your institution’s grading policy to understand how curves are applied in your course.