# Markdown to HTML > Convert Markdown to clean HTML code instantly. **Category:** Dev **Keywords:** markdown, html, convert, md, converter, code, markup **URL:** https://complete.tools/markdown-to-html ## How it calculates The conversion from Markdown to HTML isn’t about math; it’s based on a set of rules that define how each language works. Essentially, the tool takes your Markdown input (let's call it M) and applies specific transformation rules (R) to create the final HTML output (H). You can think of it like this: H = R(M). For example, when it sees '#' in M, it knows to replace it with tags, where N corresponds to the number of '#' characters. If M contains list indicators like '-', '*', or '1.', those get converted into