GPA Converter
What a 3.7 on a 4.5 scale looks like on a 4.0 scale. Institutions differ, so treat it as a guide.
A linear conversion placing 60% at 0.0 and the maximum at 100%. Schools and credential evaluators use their own formulas, so prefer any conversion printed on your transcript.
Why institutions disagree
Korean universities commonly use a 4.5 maximum while the 4.0 scale is standard elsewhere. No law fixes the conversion: schools, credential evaluators such as WES, and employers each define their own, so the same 3.7 becomes 3.29 in one place and 3.3 in another.
What to write on an application
Most forms ask for the original GPA and its maximum (for example 3.7 / 4.5). Writing your own converted figure can conflict with the transcript. When an evaluator requires a conversion, follow that organisation's formula.
Percentages
If your transcript prints a percentage, that value wins. The percentage here assumes 60% is 0.0 and the maximum is 100%.
Tips for common situations
Percentage to US 4.0 Scale Conversion
Enter your cumulative percentage score to see the equivalent US 4.0 GPA and letter grade from A+ to D. The tool uses a linear mapping where 60% equals 0.0 and 100% equals 4.0, so check your target institution's own formula before submitting.
Cross-Referencing Multiple GPA Scales
View simultaneous conversions across 4.0, 4.3, 4.5, and percentage scales from a single input to quickly assess your standing against admission cutoffs. Because universities and evaluation agencies apply custom weighting formulas, treat the result as a preliminary benchmark.
Percentage Score for Transfer Applications
Select your previous institution's grading scale and enter your GPA to receive an instant percentage conversion in the 60 to 100 range. Each transfer-admitting university defines its own conversion formula, so verify the official guidelines before final submission.
Tried with sample values
Screens and numbers from actually running this tool with sample values (2026-10-06, Chromium-based browser on a Mac). Results vary with your input and device.
Entering 3.70 on a 4.5 scale converts to 3.54 on a 4.3 scale, 3.29 on a 4.0 scale, and 92.89 on a 100-point scale. The US 4.0 equivalent is 3.29 with a letter grade of A.
The conversion uses a linear formula that maps 60 points to 0.0 and the maximum to 100. A note reminds users that each university or institution may use a different formula, so an official transcript value should take priority.
Frequently asked
Is anything uploaded?
No. The conversion runs in your browser.
Can it compute a major GPA?
It converts a single value. For a per-course average, use the figure on your transcript.
Is A+ 4.5 or 4.3?
It depends on the school, which is exactly why you should check the maximum first.
Can I convert my GPA across 4.5, 4.3, and 4.0 scales as well as percentages?
Yes, the tool instantly converts grades between 4.5, 4.3, and 4.0 GPA scales and standard 100-point percentage scores.
Does the calculator show equivalent US 4.0 values and letter grades?
Yes, it provides an equivalent US 4.0 score along with corresponding letter grades ranging from A+ down to D.
What mathematical formula is used to calculate the GPA conversion?
It uses a linear conversion model mapping 60% to 0.0 and max GPA to 100%; since institutional formulas vary, results serve as a helpful reference.
Can I upload my transcript or calculate a weighted semester GPA from course lists?
No, this is a scale conversion tool for cumulative GPA and does not support course-by-course entry or transcript uploads.