Terms
Terms of Use
The conditions for using calculator results, including your responsibility to check inputs and the limits of results for high-stakes decisions.
- Last updated
Informational utility
Checked Math outputs are provided as informational utilities. A mathematically correct implementation can still produce an unsuitable real-world decision if the inputs, assumptions, units or external facts do not match your situation.
High-stakes use
Do not treat this site as a substitute for professional legal, medical, financial, engineering, tax or safety advice. Where a decision can materially affect health, safety, legal rights or significant finances, verify the result against authoritative sources or a qualified professional.
User responsibility
- Check that the selected units and inputs match the intended problem.
- Review displayed assumptions and rounding before relying on a result.
- Use a calculator only for the scope its page describes.
- Report reproducible errors so they can be investigated and corrected.
Availability and changes
Calculators, formulas and explanations may change as errors are corrected or methods are improved. A change that alters what a result means is described on the affected calculator page.