Editorial Guidelines & Methodology

We believe a financial calculator is only useful if its underlying math is correct and its assumptions are clearly stated. Every tool on CalculatorInsight is built around a documented formula rather than a black-box estimate, and we prioritize clarity over complexity so that users can understand not just the result, but how it was derived.

Each calculator begins with research into the underlying financial concept: what problem it solves, who uses it, and what formulas or conventions the industry relies on. We derive our formulas from a combination of regulatory guidance, published broker documentation, and established academic finance literature, rather than inventing our own approximations.

Once a formula is confirmed, we implement it in a way that performs calculations directly in the user's browser, ensuring speed, privacy, and transparency. We then write supporting educational content that explains the inputs, the outputs, and the real-world context in which the calculator is useful.

Depending on the topic, we consult authoritative sources including:

• The Financial Conduct Authority (FCA) for UK retail trading and CFD regulation.
• The European Securities and Markets Authority (ESMA) for EU-wide leverage limits and CFD risk disclosure standards.
• The U.S. Securities and Exchange Commission (SEC) for investment product and disclosure standards.
• The Commodity Futures Trading Commission (CFTC) for derivatives and leverage-related rules.
• Publicly available broker documentation from major regulated CFD and forex brokers, to ensure our formulas reflect real-world margin, swap, and pip-value conventions.
• Peer-reviewed academic finance literaturecovering topics such as compound growth, portfolio theory, and risk-adjusted returns.

Before publishing a calculator, we cross-reference its output against equivalent tools provided by regulated broker platforms and established financial calculators to confirm consistency. We also test a range of edge cases — such as zero values, negative inputs, extremely high leverage, or unusually long time horizons — to ensure the tool behaves predictably and communicates limitations clearly rather than producing misleading results.

Where rounding conventions or industry-standard assumptions affect the output, we document them directly on the calculator page so users understand exactly what is being calculated.

All written content on CalculatorInsight goes through a fact-checking pass against primary or authoritative secondary sources before publication. Formulas used in each calculator are displayed transparently wherever practical, rather than hidden behind an opaque interface, so that readers with a technical or financial background can verify our logic themselves.

We avoid sensationalized claims about potential returns, do not promise guaranteed outcomes, and clearly separate factual, formula-based content from any general commentary or educational framing.

Financial markets, regulations, and industry conventions evolve. We periodically review our calculators and content to confirm they remain aligned with current regulatory guidance, market conventions, and mathematical best practices, and we update pages when a review identifies a needed change.

If you believe you have found an error in one of our calculators or articles, we want to know about it. We investigate every correction request, and where an error is confirmed, we update the affected page promptly and, where relevant, note the nature of the correction.