CGPA to GPA: 5 Wrong Formulas and the Right One

Quick answer. There is no single official CGPA-to-GPA conversion. For most US applications, the simple proportion. GPA = (CGPA / 10) × 4, is the safest default. If your target school publishes its own table, use that one instead. For graduate school applications requiring WES or ECE evaluation, the evaluator's result is authoritative.

Why this is confusing

Your university uses a 10-point CGPA. US universities want a 4.0 GPA. The conversion between them is not standardized.

Five different formulas show up in five different places. Each one gives a different answer for your 8.7 CGPA. Each is "correct" in some context. This guide explains which to use when.

Formula 1: Simple proportion

GPA = (CGPA / 10) × 4

For an 8.7 CGPA: (8.7 / 10) × 4 = 3.48.

Used by US universities as the default when no other guidance exists. Mathematically the simplest and most predictable.

When to use: When you need a single 4.0 number, your target school doesn't publish a table, and you want a defensible conversion. Disclose the formula in any free-text field.

Formula 2: Subtract-then-multiply (Indian percentage)

Percentage = (CGPA − 0.5) × 10

For an 8.7 CGPA: (8.7 − 0.5) × 10 = 82%.

This is a CGPA-to-percentage conversion, not a CGPA-to-GPA conversion. Anna University and several state universities print percentage on official transcripts using this formula.

When to use: When the application asks for percentage instead of GPA. Disclose your university's formula.

Formula 3: WES table

WES (World Education Services) maps CGPA bands to US letter grades:

| CGPA range | Letter | 4.0 equivalent | |---|---|---| | 8.0 - 10.0 | A | 4.0 | | 6.5 - 7.9 | B | 3.0 | | 5.5 - 6.4 | C | 2.0 | | 4.0 - 5.4 | D | 1.0 | | below 4.0 | F | 0.0 |

For an 8.7 CGPA: A = 4.0.

This is a coarse mapping. The actual WES evaluation runs course-by-course, not by CGPA bucket. Treat the table as an approximation.

When to use: As a sanity check against the simple proportion. Don't rely on it for graduate school. Pay for the actual evaluation when WES is required.

Formula 4: ECE table

Educational Credential Evaluators uses a similar but distinct table. ECE publishes course-by-course grading scales for India and other countries. The mapping is finer-grained than WES.

For an 8.7 CGPA on a 10-point scale at an Indian institution, ECE maps to A− or A depending on the institution.

When to use: When your target program requires ECE evaluation (some states' nursing boards, certain medical residencies).

Formula 5: Per-university table

US universities publish their own conversion tables. Stanford, Berkeley, NYU, and others all have distinct mappings.

One common US engineering school's table:

| CGPA | GPA | |---|---| | 9.0+ | 3.9-4.0 | | 8.0-8.9 | 3.5-3.9 | | 7.0-7.9 | 3.0-3.5 | | 6.0-6.9 | 2.5-3.0 | | below 6.0 | below 2.5 |

For an 8.7: 3.5-3.9, a range, not a point. The committee picks within the range based on your transcript context.

When to use: When your target school's international admissions page publishes a table. Their formula trumps every other rule.

Which one to use

A decision tree:

1. Read your target school's international admissions page first. If they say "submit on the 10-point scale," do that. If they publish a conversion table, use that.
2. Default to the simple proportion when the application requires a 4.0 number with no specific guidance. Disclose the formula in any free-text field. ("My CGPA of 8.7 converts to 3.48 on the 4.0 scale using a simple proportional formula.")
3. Use your university's percentage formula for any application asking for percentage. Indian universities print this on the transcript.
4. Pay for WES or ECE evaluation when the program explicitly requires it. Their number is authoritative.

What admissions actually does with your GPA

US admissions readers know CGPA-to-GPA conversion is fuzzy. They look at:

• The original CGPA on the official transcript.
• The institution's reputation. IIT, IISc, etc., carry known signal.
• The grading scale curve at your university. Some are generous. Others severe.
• Your class rank, when the transcript shows it.
• Your courses in detail. Strong performance in advanced courses tells more than the average alone.

The converted GPA is one data point. Don't overinvest in optimizing it.

Common mistakes

• Reporting only the converted GPA without disclosing the formula. Always include "using the simple proportional formula" or whatever applies.
• Using WES table to compute your own number when you don't have a WES evaluation. The official evaluation will differ.
• Forgetting class rank. Include it if your transcript shows it. A "top 5%" with 8.0 CGPA is stronger than a "no rank" with 8.5.
• Submitting the converted number on documents that asked for CGPA. Submit both with explanation when in doubt.

CGPA from non-Indian 10-point systems

Some non-Indian universities use 10-point CGPA (a few European and Asian programs). The same rules apply with different cutoffs. WES and ECE publish country-specific tables. Consult those.

Conversion certificates and what they mean

Online services sell "official CGPA conversion certificates" for a fee. US universities do not recognize them. The only conversions admissions cares about:

1. Your university's own (printed on the transcript).
2. WES, ECE, or another approved credential evaluator's result.
3. The target school's own internal conversion.

A third-party "conversion certificate" carries no weight beyond the math it claims.

Sources

• WES Grade Conversion Guide
• ECE Credential Evaluation Services
• AACRAO International Guides (paid)

Related calculators

• CGPA to GPA Converter, five formulas at a glance
• Percentage to GPA, for European/Asian percentage systems
• GPA to Percentage, reverse conversion
• Scale Comparison, all major scales side-by-side