About
Simple calculators. Clear answers.
On a lot of calculator websites the math itself is fine, but the answer is buried inside a page designed to keep you on it as long as possible.
Calculator Answers is the opposite. Each page is a single calculator that does its job, shows its formula, and gets out of your way. No newsletter prompts, no inventory of fake tools, just the calculators we've built carefully and stand behind.
There are hundreds of calculators here, across Education, Home, Money, Writing, Pets, Gematria Tools, Health, Everyday Life, Unit Converters, Conversions, and PDF Tools, and more get added only when they can be done as well as the current set.
How these calculators are built and checked
Trusting a calculator you did not write is mostly a matter of whether it will show you its work. These are the practices behind the pages here, described plainly so you can judge them.
- Worked examples are computed, not typed in
- On the pages rebuilt to the current standard, the numbers in the worked example are produced by the same code the calculator runs. Nobody transcribes them, so the explanation cannot quietly disagree with the tool above it.
- Automated checks pin the displayed numbers
- The project carries more than fifty automated test suites, 56 of them written for one specific rebuilt calculator. Several recompute every figure quoted in the prose directly from the calculator's own code, so changing the arithmetic fails the page rather than silently leaving the writing stale.
- Sources are read, not just linked
- 128 calculators carry a named source together with the date it was last checked. A source counts only if the document itself contains the claim being made. A page that returns successfully but does not say what it was cited for is not a source, and more than one citation here has been removed on that basis.
- Each tool says what it does not decide
- A protein target is arithmetic and makes no recommendation. A soil order is an estimate, not a measurement. Where a tool implements one convention and not another, it names the one it leaves out.
- A page can be held back
- One calculator on this site is deliberately kept out of search results and out of the sitemap until it has had qualified medical review. It was easier to publish it than to withhold it, and withholding it was the right call.
The methodology page covers how individual results are produced.
Who Runs This?
Calculator Answers was founded by Blake Boege, who builds and maintains it: the interface, the code behind each calculation, and the writing. This is an independently built site with no staff behind it, and it does not ask you to take its accuracy on trust. What it offers instead is the arithmetic in the open, a named source where a figure comes from one, and a plain statement of what each tool does not decide.
56 calculators have been rebuilt to that standard so far, each with its own automated test suite. The rest are being worked through in the same way.
Corrections and review dates
If a number here is wrong, the useful thing is to be told. Reports go to the contact page, which carries an address for exactly this. A correction to a calculation is made to the code rather than papered over in the copy, and where the mistake was one a test could have caught, a test is added at the same time so it cannot come back.
Where a calculator names a source, it also shows the date that source was last checked. That date means someone opened the document and confirmed it still says what the page claims. It is not a publication date, and it is not a promise that the page is watched continuously. A figure with no source named is the tool's own working assumption, and the pages say so where that is the case.