Calculation Methodology and Editorial Policy
HeyCal provides browser-based calculators for math, finance, health, fitness, unit conversion, and everyday tasks. This page explains what users should check before relying on a result.
Formulas and assumptions
Each calculator should identify the inputs it uses and explain the formula or calculation method where that information is meaningful. Results can depend on rounding, units, dates, tax rules, health standards, and other assumptions. Check the individual tool page for the details that apply to that calculator.
Review and updates
We review calculator logic, labels, examples, and explanatory content when a tool is added or materially changed. Financial, tax, health, legal, and engineering results are estimates; confirm current rules and professional guidance before making an important decision.
If you find a calculation, explanation, or link that appears incorrect, email [email protected] with the calculator URL and the inputs that reproduce the issue.
Responsible use
- Confirm that the selected units, dates, currency, and regional standard match your situation.
- Compare important results with the displayed formula or a trusted manual calculation.
- Do not treat a calculator estimate as professional financial, medical, legal, or engineering advice.