Short answer (cheat sheet)

• CBSE (common Indian rule for Class X CGPA): Percentage = CGPA × 9.5.
• General formula (works for any scale): Percentage = (CGPA / Max_CGPA) × 100.
• If CGPA is a credit-weighted average: first compute CGPA = Σ(credit × grade_point) / Σ(credits), then convert using the general formula or the board’s official multiplier.
• Important: many boards/universities publish their own conversion method — always follow the official method when available.

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1) Definitions (quick)

• CGPA / GPA / SGPA / Grade Point — the average grade-point value assigned by your board/university.
• Max_CGPA — the maximum possible CGPA (commonly 10 or 4).
• Credits — weight of a course (used when CGPA is credit-weighted).
• Multiplier — some boards give a fixed multiplier (e.g., CBSE’s 9.5) — use it if specified.

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2) Step-by-step methods

Method A — If your board gives a multiplier (e.g., CBSE)

1. Use the official multiplier m.
2. Compute: Percentage = CGPA × m.
3. Round as required.

Example (CBSE style): CGPA = 8.4, multiplier = 9.5

• 8.4 × 9.5 = 8.4 × (19/2) = (8.4 × 19) ÷ 2.
• 8.4 × 19 = 8.4 × (20 − 1) = 168.0 − 8.4 = 159.6.
• 159.6 ÷ 2 = 79.8 → 79.80% (or 79.8%).

Method B — Simple proportional conversion (if no official multiplier)

1. Find Max_CGPA (e.g., 10).
2. Compute: Percentage = (CGPA / Max_CGPA) × 100.

Example: CGPA = 7.6 on a 10-point scale

• 7.6 ÷ 10 = 0.76.
• 0.76 × 100 = 76.0%.

Method C — When CGPA is credit-weighted (typical in colleges)

1. For each subject/course compute credit × grade_point.
2. Sum those products: S = Σ(credit × grade_point).
3. Sum credits: C = Σ(credits).
4. CGPA = S ÷ C.
5. Convert CGPA to percentage using Method A or B (use board/university rule or the general formula).

Worked example (detailed):
Courses:

• A: credit 4, grade point 8.5 → product = 4 × 8.5 = 34.0
• B: credit 3, grade point 7.0 → product = 3 × 7.0 = 21.0
• C: credit 3, grade point 9.0 → product = 3 × 9.0 = 27.0
• D: credit 2, grade point 8.0 → product = 2 × 8.0 = 16.0
• E: credit 3, grade point 7.5 → product = 3 × 7.5 = 22.5

Now:

• Sum of products S = 34.0 + 21.0 + 27.0 + 16.0 + 22.5 = 120.5
  (34 + 21 = 55; 55 + 27 = 82; 82 + 16 = 98; 98 + 22.5 = 120.5)
• Sum of credits C = 4 + 3 + 3 + 2 + 3 = 15.
• CGPA = 120.5 ÷ 15 = 8.033333…
  (15 × 8 = 120, remainder 0.5 → 0.5 ÷ 15 = 0.033333…)
• Percentage (assuming max = 10): (8.033333… ÷ 10) × 100 = 80.3333… → 80.33% (rounded to 2 decimals).

Method D — If GPAs are on a 4.0 (US) or other non-Indian scale

• No single universal conversion — many institutions use their own table. A simple approximation:
  Percentage ≈ (GPA / Max_GPA) × 100.
  Example: GPA 3.7 on 4.0 → (3.7 ÷ 4.0) × 100 = 0.925 × 100 = 92.5% (approx.).
• Warning: foreign conversions are often done with service-specific formulas (WES, university admissions) — check those sources.

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3) Rounding & presentation rules (recommended)

• Keep two decimal places for precision (e.g., 80.33%). Some forms request one or zero decimals — follow their format.
• On CVs/applications: show both CGPA (scale) and converted % and state the conversion method, e.g.:
  CGPA: 8.03/10 (≈ 80.33% by (CGPA/10)×100) or CGPA: 8.4/10 (79.8% by CBSE method: ×9.5).

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4) Common pitfalls & tips

• Don’t assume a universal multiplier — only CBSE has the widely-used ×9.5 rule for Class X CGPA. Many colleges or universities use (CGPA/Max)*100 or their own system.
• If your board/university publishes a conversion — use that (it overrides general rules).
• Transcript vs conversion: if applying abroad, many institutions prefer official transcripts rather than your converted percent; they may convert themselves.
• If in doubt, ask the admissions office or check the official board/university website (they often publish conversion rules).

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5) Quick reference table (use only if no official rule)

Situation	Formula
CBSE Class X (common)	Percentage = CGPA × 9.5
Any scale (safe default)	Percentage = (CGPA ÷ Max_CGPA) × 100
Credit-weighted CGPA	Compute CGPA = Σ(credit×gp)/Σ(credits), then convert with above
US 4.0 (approx.)	Percentage ≈ (GPA ÷ 4.0) × 100 — but check official conversion tables

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6) Final checklist (what you should do)

1. Find which scale your CGPA is out of (10, 4, 7, etc.).
2. Check official documents for a conversion formula/multiplier.
3. If no official formula, use (CGPA / Max) × 100.
4. Show both CGPA (with scale) and percentage on forms; state the method used.
5. Round as requested by the receiving institution.

You can Do This Here : CGPA2Percentage.com

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If you want, paste your exact CGPA and the scale (e.g., 8.4 / 10 or 3.7 / 4.0) and I’ll convert it step-by-step for you and show rounding to 1 or 2 decimals as you prefer.

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