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Math & AlgebraGenerated accuracy model review: 2026-05-06
Rounding Calculator 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
- Standard rounding looks at the digit immediately to the right of the target place. * If digit < 5, keep the target digit (round down). * If digit ≥ 5, increase the target digit by 1 (round up).
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Number: 123.46
- Round To: 2 Decimal Places (0.01)
Expected outputs
- Rounded Number: 123.46
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 calculator uses standard half-up rounding, so .5 values round away from zero.
- Rounding changes presentation precision but does not preserve every original digit.
- Very large or very precise floating-point inputs can still reflect normal JavaScript numeric limits.
Unit handling
- Number accepts numeric values.
- Round To accepts one of the configured options.
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 rounding-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Rounding Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.