This page explains how CalcCopilot creates, checks and maintains its calculators and the written content around them. Our goal is simple: give you fast, clear, genuinely useful answers you can trust — and be honest about what our tools can and cannot do. It sits alongside our About and Privacy Policy pages.
Every calculator on CalcCopilot is built in‑house. The maths behind them comes from well‑established, publicly documented formulas — the standard loan amortisation formula, compound interest, the Mifflin‑St Jeor equation for calories, statutory tax arithmetic, and so on. Where a topic has more than one widely used method, we choose the most common, transparent approach and explain it in plain language on the page, usually in a dedicated “Formula” section. All descriptive text is original work written by our own team; we do not copy content from other websites.
Before a calculator is published — and whenever we change one — we test it against worked examples and, where relevant, against figures published by authoritative bodies such as the U.S. Internal Revenue Service (IRS), the Federal Reserve, the U.K. HMRC, the Canada Revenue Agency, the CDC and comparable official sources. For anything time‑sensitive, such as tax bands, contribution limits or typical rates, we verify the numbers against the primary source at the time of writing.
Every calculator ships with a plain‑language “Sources & methodology” note that lists the formula and the references it relies on. We prioritise primary and official sources — government agencies, regulators and standards bodies — over second‑hand summaries. When we cite a figure that can change over time, we say when it was last checked.
Our tools are designed to give you an estimate for general information and educational purposes. Real‑world results depend on details we cannot see — your exact tax situation, a lender's specific terms, local rates, rounding rules and personal circumstances. Because of this, our results are not a substitute for professional financial, tax, legal or medical advice. For decisions that really matter, please confirm the numbers with a qualified professional.
We keep our calculators under active review. When we spot an error, or when a rule or rate changes, we correct the tool and the surrounding content and update the “Last updated” date shown on the page. If you think something is wrong, please tell us (see below) — we read every report and fix genuine issues quickly.
CalcCopilot is an independent, self‑funded project. Our calculators are free to use and supported by advertising. Advertising never influences a calculator's formula, its result, or what we write about a topic — the maths is the maths. We do not publish sponsored results or “pay‑to‑rank” recommendations inside our tools.
CalcCopilot is run by a small, independent team led by a founder with a background in engineering and mathematics, who builds and tests each calculator against worked examples. You can read more about us on our About page.
Found a mistake, or have a question about how a tool works? Email us at calccopilot@gmail.com or use our Contact page. Corrections and improvement ideas are always welcome.
Estimates only — not professional financial, tax, legal or medical advice. Last updated .