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TechnologyGenerated accuracy model review: 2026-05-06
Aspect Ratio 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
- Divides Width and Height by their GCD (Greatest Common Divisor).
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Width: 1,920
- Height: 1,080
Expected outputs
- Aspect Ratio: 16:9
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
- Width and height should be positive whole-number dimensions.
- The ratio is simplified using the greatest common divisor of the two dimensions.
- The calculator reports the exact mathematical ratio, which may differ slightly from rounded marketing labels like 21:9.
Unit handling
- Width accepts numeric values.
- Height accepts numeric values.
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 aspect-ratio-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Aspect Ratio.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.