Math & AlgebraGenerated accuracy model review: 2026-05-06

Roman Numerals 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

Roman numerals use seven symbols: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. * **Addition Rule:** If a symbol is after a larger (or equal) one, add it (VI = 5+1 = 6). * **Subtraction Rule:** If a symbol is before a larger one, subtract it (IV = 5-1 = 4).

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

Mode: Number to Roman
Number or Roman Numeral: 2024

Expected outputs

Converted Value: MMXXIV

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

Standard Roman numerals do not include zero or negative numbers.
This calculator uses standard modern notation up to 3999 and rejects malformed Roman strings.
Only the seven standard symbols I, V, X, L, C, D, and M are supported.

Unit handling

Mode accepts one of the configured options.
Number or Roman Numeral accepts text 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 roman-numeral-converter calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for Roman Numerals.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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