How calculations will be built
Formula logic lives outside interface components and is deterministic, typed and unit-tested. Inputs, units, rounding and assumptions are documented alongside each tool.
Sources and review
External constants will cite reliable sources and include review dates. Examples will be independently testable, and material changes will be reflected in each calculator’s update date.
Results are guidance
Calculators support decisions but cannot replace advice from a qualified professional when safety, law, health or significant finances are involved.