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Math & AlgebraGenerated accuracy model review: 2026-05-06
Molecular Weight 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
- The calculator splits the string into elements and counts. Example for H₂O: * Hydrogen (H): 1.008 × 2 = 2.016 * Oxygen (O): 15.999 × 1 = 15.999 * Total = 18.015 g/mol.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Chemical Formula: H2O
Expected outputs
- Molar Mass: 18.02 g/mol
- Status: Valid
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
- Formulas must use standard capitalization for element symbols.
- This parser supports common formulas without grouped parentheses.
- Only elements included in the built-in atomic-weight table can be evaluated.
Unit handling
- Chemical Formula accepts text values.
- Molar Mass is displayed in g/mol.
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 molecular-weight-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Molecular Weight.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.