# SimCálculo

> Browser-based calculators in Portuguese and English. Read each tool's assumptions and limitations; estimates do not replace professional advice.

## Language catalogs

- [Português — Brasil](https://simcalculo.com/): Calculadoras e conteúdo em português.
- [English calculators](https://simcalculo.com/calculators/): English tools with their own units and conventions.

## Public tools

- [Calculadoras em português — SimCálculo](https://simcalculo.com/): Catálogo de calculadoras em português; consulte as premissas e limitações de cada ferramenta.
- [Busca CEP](https://simcalculo.com/busca-cep/): Consulta de endereço por CEP ou CEPs por rua, cidade e UF. Exige verificação Cloudflare; fornecedores externos; cache de até 24 horas.
- [Date Duration Calculator](https://simcalculo.com/calculators/date-duration-calculator/): Count calendar days, weeks, calendar years/months/days and optional Monday–Friday days between dates.
- [Square Footage Calculator](https://simcalculo.com/calculators/square-footage-calculator/): Calculate the area of rectangular rooms or surfaces in square feet or square meters, with waste allowance and optional material cost.
- [Percentage Calculator](https://simcalculo.com/calculators/percentage-calculator/): Calculate percentages, proportions, discounts, increases and percentage difference, with formulas.
- [Fraction Calculator](https://simcalculo.com/calculators/fraction-calculator/): Exact fraction addition, subtraction, multiplication and division, with mixed numbers and calculation steps.
- [Ovulation Calculator](https://simcalculo.com/calculators/ovulation-calculator/): Educational calendar estimate of ovulation and fertile dates; not contraception or confirmation of ovulation.
- [Roof Pitch Calculator](https://simcalculo.com/calculators/roof-pitch-calculator/): Roof slope geometry, pitch, angle, rafter length and area. No structural design.
- [Salary to Hourly Calculator](https://simcalculo.com/calculators/salary-to-hourly-calculator/): Gross pay conversion using entered hours and paid weeks. No taxes or overtime premiums.
- [Margin Calculator](https://simcalculo.com/calculators/margin-calculator/): Margin, markup and selling price from entered costs. No automatic taxes or fees.
- [Test Grade Calculator](https://simcalculo.com/calculators/test-grade-calculator/): Single-test percentages and optional example or custom letter scales. No official school policy.
- [Deck Material Calculator](https://simcalculo.com/calculators/deck-material-calculator/): Straight rectangular decking board estimate with gaps, kerf and spare allowance. No structural design.

## Discovery

- [Portuguese content index](https://simcalculo.com/llms.txt): Published Portuguese content.
- [English content index](https://simcalculo.com/llms.txt): English tool descriptions.
- [Sitemap index](https://simcalculo.com/sitemap_index.xml): Published sitemaps.
- [English sitemap](https://simcalculo.com/page-sitemap.xml): English pages.
- [Resource manifest](https://simcalculo.com/.well-known/ard.json): Public HTML resources; this is not a remote MCP server. WebMCP support depends on the browser and origin trial.