About CalculatorBuddy

CalculatorBuddy is a free library of practical calculators for finance, health, math, construction, dates, and everyday decisions. Our goal is simple: give you a useful result and make the reasoning behind it easy to inspect.

What makes a CalculatorBuddy calculator useful

• Results appear immediately and work on phones, tablets, and desktops.
• Formula explanations, assumptions, examples, and FAQs accompany the tool.
• Default examples produce real server-rendered results that can be checked without JavaScript.
• Calculators are tested against known values and edge cases before publication.
• Each editorial page displays its maintenance date.

Who maintains the site

The CalculatorBuddy Team maintains the calculator definitions, formula implementations, tests, and explanatory content. We do not claim that a general-purpose calculator replaces advice from a qualified financial, medical, tax, legal, engineering, or other professional.

Accuracy and limitations

We aim for accurate, reproducible estimates, but real-world outcomes can depend on rules, rates, rounding conventions, provider terms, and personal circumstances that a general calculator cannot fully model. Important decisions should be verified against current official guidance and your own documents.

Read our editorial methodology for the standards we use, or review our privacy practices.