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About this tool
Turn subject-wise marks into a radar chart with strongest and weakest subjects and a balance score across all of them.
This tool plots subject-wise marks on a radar (spider) chart by normalising every score to a percentage of its own maximum, so unequal totals like 100-mark and 80-mark papers share one scale. It also computes the standard deviation of your percentages to grade how balanced your profile is, and names your strongest and weakest subjects. It is meant for students planning revision time and for parents and mentors reviewing a report card at a glance.
Open Subject Strength Radar 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.
Marks are converted to percentages of each paper's maximum before plotting.
Standard deviation across subjects classifies the profile as balanced, moderate or uneven.
The shortest spoke of the radar is your weakest subject — no table reading needed.
It is a polygon chart with one axis per subject, where the distance from the centre shows the percentage scored in that subject. A large, even polygon means uniformly strong performance; a dented polygon points at specific weak subjects.
Convert each to a percentage first: a 68/80 in one paper is 85%, which beats 82/100. This tool does that conversion automatically before plotting, so every axis runs 0-100%.
By the population standard deviation of your subject percentages. Under 8 points is treated as well balanced, 8-15 as moderately uneven, and above 15 as clearly lopsided — bands chosen because common grade slabs are about 10 points wide.
At least 3, because a radar chart needs three axes to enclose an area, and this tool plots up to 10. With only two subjects a simple side-by-side comparison is more readable than a radar.