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About this tool
Compare marks across semesters or years, see percentage-point change per period and the least-squares trend of your scores.
This tool compares marks across years or semesters by converting each period to a percentage and reporting the change between consecutive periods in percentage points. It then fits an ordinary least-squares trend line (percentage against period number) to classify your trajectory as improving, stable or declining. It is built for students and parents who want to see whether performance is genuinely trending up, not just bouncing around a single good or bad result.
Open Year On Year Marks Comparator on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Each period is normalised to a percentage, so a 500-mark year and a 400-mark year compare fairly.
A least-squares line across all periods separates genuine improvement from one lucky result.
Every year shows its exact percentage-point change from the previous one.
Convert each year to a percentage first: marks obtained divided by maximum marks, times 100. This tool does that automatically, so 372/500 (74.4%) and 406/500 (81.2%) compare directly as a +6.8 percentage-point improvement even if the maximums had differed.
Moving from 60% to 70% is a rise of 10 percentage points, but a 16.7% relative increase. Mark comparisons should use percentage points, because that is how boards and universities express score gaps, and it is the unit this tool reports.
It fits a least-squares straight line through your percentages and reads the slope. A slope above +0.5 percentage points per period counts as improving, below -0.5 as declining, and anything in between as stable, since half a point is within normal marking variation.
It is a straight-line extrapolation of your past trend, clamped between 0% and 100%, and should be read as a momentum indicator rather than a prediction. Syllabus difficulty, exam pattern changes and effort all shift real outcomes.