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Education & GPAGenerated accuracy model review: 2026-05-06
Percentage to GPA accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- It maps the input number to a standard range: * 93-100 = 4.0 (A) * 90-92 = 3.7 (A-) * 87-89 = 3.3 (B+) ...and so on.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Percentage: 92%
Expected outputs
- GPA (4.0 Scale): 3.7
- Letter Grade: A-
Known limitations
- This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
- Use the result as a planning estimate unless the calculator page states a stricter purpose.
Assumptions
- This converter follows the fixed percentage bands shown in the calculator rather than your school's custom scale.
- The output is an unweighted 4.0 estimate and does not include AP, honors, IB, or class-rank weighting.
- Schools that treat 90-100 as a flat 4.0 or use different plus/minus cutoffs may report different official values.
Unit handling
- Percentage accepts values in %.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current percentage-to-gpa-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Percentage to GPA.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.