How do you know the number a free calculator gives you is right? That is a fair question to ask of any tool site. This page explains who builds the tools on Anchor AI Tools, how every formula gets checked, where the figures come from, and what happens when something is wrong.
Every calculator, converter, and guide on Anchor AI Tools is built and maintained by Amara Taylor. There is no rotating pool of anonymous contributors and no ghost byline. If a page carries a name, that person wrote it, tested it, and is the one who will fix it.
You can read more on the about page, or write directly to hello@anchoraitools.com. Messages are read by a person, not a ticket queue.
Each tool uses the standard, established formula for its subject rather than an approximation invented for the site. The formula is shown on the page so you can check the method, not just the answer.
Before a tool goes live, its output is checked by hand against example cases, including edge cases such as zero values, very large inputs, and rounding boundaries.
Every calculator page includes the formula, at least one fully worked example, and answers to the questions people most often ask. A number with no explanation is not a finished tool.
Tax brackets, material prices, and labour rates move. Pages built on figures that change are reviewed and updated rather than left to go quietly stale.
Formulas for maths, measurement, time conversion, and finance are standard and publicly documented. They do not change, so those tools stay accurate as long as the arithmetic is right.
Rate and cost figures are a different matter. Tax rates, vehicle fees, millage rates, labour statistics, and construction costs are taken from published government and industry sources, not estimated from memory.
On pages carrying figures like these, we are rolling out a visible source line naming the authority behind the number, alongside the date it was last checked. You can then verify it yourself, or see at a glance how fresh it is.
A word on what these tools are for. Anchor AI Tools produces estimates for planning, budgeting, and learning. They are a good starting point and a useful sanity check.
They are not a substitute for a qualified professional on a financial, tax, legal, insurance, medical, or construction decision that actually matters. Where a page deals with money or safety, it says so plainly.
Mistakes happen. When one is reported or found, the page is corrected as soon as the error is confirmed, and its last updated date is changed so you can see the page moved.
If you spot a wrong result, an outdated rate, a broken tool, or a formula that does not match the method you were taught, send it to hello@anchoraitools.com. A short description of what you entered and what you expected is enough.
Corrections from readers are the fastest way this site gets better, and several tools exist because someone wrote in asking for them.
The tools are free and there is no account to create, so running costs are covered by advertising. Where ads appear, they sit around the content, clearly separated from it. They never sit inside a form, never imitate a calculate or download button, and never influence which tools are built or what a guide recommends.
Drafting tools are sometimes used to speed up research and first drafts, the same way a spellchecker or a spreadsheet gets used. Nothing goes live unread. Every formula, figure, worked example, and result on this site is checked by a person before publication, and Amara is accountable for what appears under her name.
Calculators run in your browser, which means the numbers you type stay on your device. Files uploaded to the PDF tools are processed and then removed, not stored or shared. The full detail is in the privacy policy.
Tell us and it gets fixed. Suggestions for new tools are just as welcome as corrections.
Get in touch →Last updated: September 13, 2026 · Maintained by Amara Taylor, Content Lead, Anchor AI Tools.