Disclaimer
Calculators on aiocalc.com produce estimates based on the inputs you provide and the formulas described on each calculator's page. They're built and tested carefully, but they're general-purpose tools — not a substitute for advice from a qualified professional (a contractor, accountant, physician, or engineer, depending on the calculator).
For anything with real financial, structural, medical, or legal consequences — ordering materials for a load-bearing structure, filing taxes, managing a health condition — confirm the numbers with someone qualified before acting on them.
Health calculators (BMI, TDEE, BMR, calories, body fat, protein, pregnancy, and similar) are not medical advice and aren't a substitute for care from a doctor, midwife, or registered dietitian. This applies especially to the pregnancy and due-date tools: due dates, gestational age, and testing windows are all statistical estimates, not diagnoses — always confirm timing and any health concern with your care provider.
Retirement-age figures on the Age Calculator reflect the published U.S. Social Security full-retirement-age table by birth year — they're not a substitute for your actual benefit statement from the Social Security Administration, and don't account for individual circumstances that can shift your real eligibility or benefit amount.
Money calculators (mortgage, loan, paycheck, retirement, compound interest, and similar) are not financial, tax, or investment advice. Lenders' quotes depend on your credit and the loan's terms, paycheck withholding depends on your W-4 and your employer's payroll system, and investment returns are never guaranteed. Confirm with your lender, employer, or a qualified financial professional before acting on a result.
Most calculators are built for general, worldwide use. Where a calculator only applies to one country's rules or units (the Paycheck Calculator, for example, uses U.S. federal tax brackets and payroll tax rates for a stated tax year), that's stated clearly on the calculator's own page.
No professional relationship. Using a calculator on this site doesn't create a client, patient, or advisory relationship of any kind between you and aiocalc.com — the same way a printed reference chart or a physical calculator wouldn't. Nothing here is personalized to your situation; it's general-purpose math applied to the numbers you enter.
Not affiliated with any official body. Where a calculator is based on a government or standards-body source — for example, the Age Calculator's use of the published U.S. Social Security full-retirement-age table — aiocalc.com is an independent, unaffiliated implementation of that public information, not an official tool of the Social Security Administration or any other agency. Always confirm figures that matter against the original source.
Found a calculator that seems to produce an incorrect result? Please let us know — we'd rather fix it than have it stay wrong.