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Percentage, Marks & CGPA Calculator

Make each formula visible.

Calculate percentages and marks, or apply the linear CGPA formula supplied by your institution. Every result shows its inputs and rule.

Free · calculated on your device

Percentage of a value

Calculate X ÷ 100 × value. Signed inputs are supported.

Marks to percentage

Use aggregate obtained marks and aggregate possible marks.

Institution-supplied CGPA conversion

Percentage = CGPA × multiplier + offset

No universal CGPA conversion is used. Enter the linear rule actually supplied by your institution; use its official method if the rule is nonlinear.

A private note for the calculation. We do not verify this rule or visit the reference.

Ordinary decimals only: up to six decimal places, no commas or scientific notation. General inputs are bounded to ±1 billion; CGPA scale and multiplier are at most 100, and offset is within ±100. Results round to four decimal places, halves away from zero. A percentage outside 0–100 from the supplied CGPA rule is refused, not clamped. No grades, pass threshold or official conversion is inferred.