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TabBench

AI Code & Formula Explainer

Get instant, plain-English explanations for complex formulas, financial calculations, regex patterns, or code snippets.

Runs on your device by default. The optional cloud AI mode sends your input to Google Gemini.

What the AI Code & Formula Explainer does

Formulas, financial metrics, and regular expressions are compact notation that assumes you already know the concept — which is exactly the problem when you do not. This explainer takes an expression or a term and returns a plain-English breakdown: what each part does, why the formula is constructed that way, and a worked example with real numbers.

How to get an explanation

  1. Type a question, or paste a formula, spreadsheet function, regex or code snippet. Free-form questions are answered by Google Gemini, so they need an internet connection.
  2. Press Explain, or Ctrl + Enter, and read the answer as it is written.
  3. Check anything you will rely on, especially numbers: AI answers can be confidently wrong.
  4. For common formulas — margin and markup, percentage change, compound interest, EMI, GST, SIP, BMI, JWT — pick a topic under "Common formulas, explained" for a checked explanation that works offline.
  5. Follow the link under each explanation to the matching calculator and try it with your own numbers.

The AI Code & Formula Explainer runs on your device by default. If you switch to the optional cloud AI mode, your input is sent to Google's Gemini model to produce the result.

When to use it

Understanding a financial metric before using it

Knowing why margin divides by price and markup divides by cost is what stops you from mixing them up later. The explanation is more durable than the formula.

Decoding a regular expression

Inherited regexes are notoriously opaque. A component-by-component breakdown is far faster than working through the syntax reference.

Learning a calculation you keep looking up

Formulas you re-derive every time are ones you never actually learned. An explanation of the reasoning tends to stick where the notation does not.

Good to know

  • Be specific. 'Explain compound interest' returns something general; 'explain why compound interest uses (1+r)^n' returns the part you actually wanted.
  • Ask for a worked example with your own numbers — following the arithmetic is what confirms understanding.
  • Cross-check anything consequential. Explanations are a learning aid, not professional advice.

Frequently asked questions

What can it explain?

Ask anything about a formula, calculation, spreadsheet function, regex or code snippet and Google Gemini answers it. Hand-written explanations of common formulas — margin and markup, percentage change, compound interest, loan EMI, GST, SIP, BMI and JWT — work instantly and offline.

What kinds of things can this explain?

Mathematical and financial formulas, business metrics such as margin, markup, break-even, and ROI, regular expression patterns, JSON and data-format syntax, and the calculations behind the other tools on this site.

Should I rely on this for financial or legal decisions?

No. It is an educational aid that explains how a calculation works. It does not know your circumstances, jurisdiction, or tax position, and it is not a substitute for a qualified accountant, financial adviser, or lawyer. Verify anything with real consequences.

How is this different from searching for the formula?

A search returns the formula; this returns the reasoning behind it. Understanding why the denominator is the selling price in a margin calculation is what prevents the mistake, whereas memorising the formula generally does not.

Can it explain formulas in other languages?

Mathematical notation is universal, so the expressions themselves are understood regardless. Explanations are returned in English.

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