# BQ Calculator

> Fast, private, browser-first calculators for finance, health, construction and everyday decisions. Calculations run locally in the browser, with transparent formulas, assumptions and limitations.

Use this file as the concise discovery index for BQ Calculator. Follow the Markdown links below for calculator pages and machine-readable resources. Shareable calculator query parameters may contain user inputs; agents should avoid treating those parameters as analytics or persistent identifiers.

Version: 1.4.0

## Calculators

- [Compound Interest Calculator](https://calculator.bqtools.com/compound-interest-calculator/): Project savings and investment growth with recurring contributions and compound interest.
- [Mortgage Payment Calculator](https://calculator.bqtools.com/mortgage-calculator/): Estimate principal and interest, taxes, insurance, HOA costs and total monthly mortgage payment.
- [Loan Payment Calculator](https://calculator.bqtools.com/loan-calculator/): Calculate installment-loan payments, total interest and the impact of optional extra monthly payments.
- [Savings Goal Calculator](https://calculator.bqtools.com/savings-goal-calculator/): Estimate the monthly contribution needed to reach a savings target by a chosen date and interest rate.
- [Calorie Deficit & TDEE Calculator](https://calculator.bqtools.com/calorie-deficit-calculator/): Estimate BMR, maintenance calories and a calorie target based on your activity and goal.
- [BMI Calculator](https://calculator.bqtools.com/bmi-calculator/): Calculate adult BMI, view the standard category range and estimate the BMI 18.5–24.9 weight interval for your height.
- [Concrete Calculator](https://calculator.bqtools.com/concrete-calculator/): Estimate concrete volume, waste allowance, premix bags and ready-mix requirements.
- [Paint Calculator](https://calculator.bqtools.com/paint-calculator/): Estimate interior wall paint from room dimensions, openings, coats and product coverage.
- [Flooring Calculator](https://calculator.bqtools.com/flooring-calculator/): Estimate floor area, waste allowance, material quantity and full-box requirements for common flooring projects.
- [Tip Calculator & Bill Splitter](https://calculator.bqtools.com/tip-calculator/): Calculate tax, tip, total bill and the amount each person owes.
- [Percentage Calculator](https://calculator.bqtools.com/percentage-calculator/): Solve common percentage-of, percent-of-total and percentage-change calculations instantly.
- [Scientific Calculator](https://calculator.bqtools.com/scientific-calculator/): Evaluate arithmetic and scientific expressions with trig, logs, roots, powers, constants, memory and keyboard input.
- [Unit Converter](https://calculator.bqtools.com/unit-converter/): Convert length, mass, area, volume, speed, temperature, time and digital-storage units locally in your browser.
- [Date Difference Calculator](https://calculator.bqtools.com/date-difference-calculator/): Find the exact number of days, weeks and calendar years, months and days between two dates.

## Categories

- [Finance Calculators calculators](https://calculator.bqtools.com/finance/): Browse published finance calculators calculators.
- [Health Calculators calculators](https://calculator.bqtools.com/health/): Browse published health calculators calculators.
- [Construction Calculators calculators](https://calculator.bqtools.com/construction/): Browse published construction calculators calculators.
- [Everyday Calculators calculators](https://calculator.bqtools.com/everyday/): Browse published everyday calculators calculators.

## Agent-readable resources

- [Full agent-readable corpus](https://calculator.bqtools.com/llms-full.txt): Combined text of all canonical BQ Calculator pages.
- [Calculator registry](https://calculator.bqtools.com/calculators.json): Structured metadata for every published calculator.
- [Agent discovery index](https://calculator.bqtools.com/agent-index.json): Structured page and capability discovery metadata.
- [Agent guide](https://calculator.bqtools.com/AGENTS.md): Interaction, privacy and protocol guidance for agents.
- [OpenAPI metadata](https://calculator.bqtools.com/openapi.json): OpenAPI 3.1 description of public read-only metadata resources.
- [RFC 9727 API catalog](https://calculator.bqtools.com/.well-known/api-catalog): Linkset catalog for public machine-readable resources.
- [WebMCP manifest](https://calculator.bqtools.com/.well-known/webmcp.json): Experimental browser-local WebMCP capability manifest.
- [Agent skills index](https://calculator.bqtools.com/.well-known/agent-skills.json): Browser WebMCP capability descriptions.

## Site information

- [All calculators](https://calculator.bqtools.com/calculators/): Human-readable calculator directory.
- [About BQ Calculator](https://calculator.bqtools.com/about/): Product architecture and operating principles.
- [Frequently asked questions](https://calculator.bqtools.com/faq/): General product and calculator questions.
- [Privacy](https://calculator.bqtools.com/privacy/): Local storage, analytics consent and data-handling details.
- [Sitemap](https://calculator.bqtools.com/sitemap.xml): Canonical indexable URL inventory.