Purpose and responsibility
Tools provide educational calculations and scenario estimates. Check your inputs, units, assumptions and result before relying on it. Results do not establish eligibility, diagnosis or a professional recommendation.
Availability and corrections
Tools may change as errors are corrected or methods improve. Continuous availability and error-free results are not guaranteed. Report reproducible problems through our Contact page.
Fair use
Do not disrupt the website, evade security controls or misrepresent its results. Ordinary calculations run on your device and require no account or payment.
Your rights
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