A formula circulates widely among Bangladeshi students for converting their 4.0-scale CGPA into a percentage:
Percentage = (CGPA − 2.00) × 10 + 50
Run a perfect 4.0 through it and you get 70%, not 100%. That surprises almost everyone the first time, because it seems to undersell a top score. It isn’t a mistake, though it reflects a genuinely different way of thinking about the conversion than the simple proportion most people expect. Here’s how the formula works, why it produces that result and importantly where it’s honest to say there isn’t one single official answer.
How the Formula Works
| CGPA (4.0 scale) | Percentage |
|---|---|
| 4.00 | 70% |
| 3.75 | 67.5% |
| 3.50 | 65% |
| 3.25 | 62.5% |
| 3.00 | 60% |
| 2.75 | 57.5% |
| 2.50 | 55% |
| 2.25 | 52.5% |
| 2.00 | 50% |
Worked example: a 3.5 CGPA → (3.5 − 2.00) × 10 + 50 = 1.5 × 10 + 50 = 65%.
Why It Doesn’t Reach 100% at the Top
Compare this to the simpler method most people assume applies a direct proportion, where Percentage = (CGPA ÷ 4.0) × 100. Under that method, a 4.0 CGPA would indeed equal 100%. The two methods only agree at one point: a 2.0 CGPA equals exactly 50% either way. Above that, they diverge sharply by a full 30 percentage points at the top of the scale.
| CGPA | (CGPA−2)×10+50 | Direct Proportion |
|---|---|---|
| 4.00 | 70% | 100% |
| 3.50 | 65% | 87.5% |
| 3.00 | 60% | 75% |
| 2.50 | 55% | 62.5% |
| 2.00 | 50% | 50% |
The logic behind the (CGPA − 2.00) × 10 + 50 approach treats 2.0 as the practical floor of the scale (roughly where a passing grade sits) and 4.0 as the ceiling, then distributes the percentage range between 50% and 100%… except the formula as commonly shared actually caps out at 70%, not 100%, which suggests it’s designed to be a deliberately conservative equivalency rather than a literal proportional conversion treating a top CGPA as strong but not claiming it represents “perfect” performance in percentage terms.
An Important Honest Caveat
Unlike some countries where a single nationally recognized body publishes one official conversion formula, Bangladesh doesn’t have one universal, government-mandated CGPA-to-percentage formula that every university and employer accepts. The formula above is the one most commonly shared and searched by Bangladeshi students, particularly for foreign credential evaluation and job applications, but individual universities may specify their own equivalency method, especially for anything issued as an official transcript note or equivalence certificate.
If the percentage is going somewhere formal a foreign university application, a WES-style credential evaluation, a job application with a strict percentage cutoff it’s worth checking with your university’s controller of examinations office for their specific published conversion, rather than relying on this formula alone.
For the broader picture of how CGPA, GPA and percentage relate to each other across different countries, our What is CGPA guide covers the underlying concepts in more depth.
Frequently Asked Questions
What is a 4.0 CGPA in percentage in Bangladesh?
Using the widely circulated (CGPA − 2.00) × 10 + 50 formula, a 4.0 CGPA converts to 70%. This is noticeably lower than what a simple proportional method would give (100%), because the formula isn’t designed as a direct proportion.
Is there an official CGPA to percentage formula in Bangladesh?
Not a single universal one. Unlike some countries with one nationally standardized formula, individual Bangladeshi universities may use their own conversion method. The (CGPA − 2.00) × 10 + 50 formula is widely shared and used informally, particularly for foreign applications, but it’s worth confirming with your specific institution for anything formal.
Why does the formula give such a different answer than dividing CGPA by 4?
Because the two methods are built on different assumptions. Dividing by 4 and multiplying by 100 treats the conversion as a straight proportion. The (CGPA − 2.00) × 10 + 50 method instead maps the CGPA range onto a percentage range starting at 50%, which produces a lower result at the top of the scale.
What is 3.5 CGPA in percentage?
Using the (CGPA − 2.00) × 10 + 50 formula, a 3.5 CGPA converts to 65%.
Can I use this formula for a foreign university application?
It’s commonly used for that purpose informally, but check the specific requirements of the institution or evaluation service you’re applying to. Some may want a formula from your home university’s own academic office rather than a generally circulated one.