Test Score Difference Calculator
Compare two test score percentages. The signed difference is the second score minus the first, measured in percentage points.
How to use Test Score Difference Calculator
1. Enter First Score %, Second Score % using the same scoring scale or point-total model. 2. Keep earned points and scores non-negative; enter a target between 0 and 100 where requested. 3. Select Calculate or press Enter to see percentage-point difference. 4. Select Select Copy result to copy the answer or Reset to clear the form.
Why use this tool?
Compare two test percentages and distinguish an absolute percentage-point change from a relative percentage change.
How the calculation works
Percentage-point difference = second score percentage − first score percentage. A positive result means the second score is higher. Test grades can use assessment-specific boundaries, scaling or weighting. This page performs the stated arithmetic only; use the applicable marking policy when interpreting the result. Percentages, point gaps and differences use up to two decimal places; averages use up to three. Smaller nonzero results use six significant digits in scientific notation. Browser floating-point rounding applies. Numeric input and result magnitudes must not exceed 9,007,199,254,740,991. Score and weight lists support up to 20,000 entries.
Example
First Score % = 90, Second Score % = 78 gives “-12 percentage points”.
Practical tip
An increase from 60% to 80% is 20 percentage points. Relative to 60%, it is a 33.33% increase; those are different descriptions.
Frequently asked questions
Is this a relative percentage change?
No. It subtracts two percentages. An 80% score minus a 60% score is 20 percentage points, not a 20% relative increase.
What grading rules are assumed?
Test grades can use assessment-specific boundaries, scaling or weighting. This page performs the stated arithmetic only; use the applicable marking policy when interpreting the result.
Are extra credit and fractional points supported?
Non-negative fractional points are accepted. Supplied earned points or scores above the ordinary maximum can represent existing extra credit. Targets are limited to 0–100%; future target-score planning assumes at most the stated available points. The tool does not determine your grading policy.