GPA converter for common and custom scales
Compare the same relative position across 4.0, 4.3, 5.0, 6.0, 7.0, 10.0 and 100-point scales, or type a custom maximum.
Calculate the GPA scale conversion
The GPA scale converter maps one reported value from its source maximum to a target maximum with the proportional formula shown below.
Local calculationBoundary: this GPA estimate preserves relative position on the scale. It doesn't reproduce an institution's course, weighting, or credential-evaluation policy.
A scale comparison, not a universal equivalency
For GPA records, the converter assumes the scales are proportional.
That makes the arithmetic consistent and inspectable, but real grading systems often use grade bands, subject rules and institutional adjustments. A 70% in one system is not automatically equivalent to 2.8 everywhere. The GPA label stays explicit in this method record.
| Reported value | Source scale | 4.0 estimate |
|---|---|---|
| 3.7 | 5.0 | 2.96 |
| 7.5 | 10.0 | 3.00 |
| 85 | 100 | 3.40 |
Choose the correct maximum
Use the maximum for the GPA field on the transcript, not the highest GPA attained by a student in the class. Common App, for example, distinguishes the reported GPA scale from weighting information. A weighted 4.6 can legitimately exceed 4.0 when the school's scale allows bonus points.
Keep both numbers
When you save or share an estimate, keep the original GPA and scale beside the converted value. That preserves context and makes it clear that the result was calculated rather than issued by the school.
Rounding and precision
The GPA converter keeps full browser precision during arithmetic and rounds the displayed result to two decimals.
A 3.33 GPA on a 4.0 scale converted to 10.0 equals 8.325 before display and 8.33 after display. Rounding only the final GPA avoids compounding an early rounding error.
A portable calculation note
A portable GPA note records the input, source maximum, target maximum, formula, and date reviewed. That note lets another reader reproduce the conversion without guessing which scale or method produced the number. The original GPA remains the evidence; the converted GPA remains an estimate.
References used for this GPA method
These named references provide method evidence for the GPA terminology, calculation context, and policy boundary stated on this page. The method evidence remains visible beside every linked source.