W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

A design element gallery for web designers and web developers. Find snippets using HTML, CSS, Javascript, jQuery, and Bootstrap.

HTML, CSS, JavaScript editor playground for designers & developers to compare, prototype and test frontend frameworks

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

Use this easy Frequency tool to quickly convert Hertz to Beats per minute

This tool converts Hertz (Hz) to Beats per minute (BPM). A link is available to convert Beats per minute (BPM) to Hertz (Hz).

Convert decimals to fractions or mixed number fractions. Calculator to change decimals to fractions showing the work with steps. Converts repeating decimals to fractions.

Convert a decimal value to a ratio using a simple calculator. See all of the steps to solve the ratio included with the results.

Free and fast online Big Integer Number calculator. Just type in your numbers in decimal or hexadecimal format and click any button. This calculator can handle large numbers, with any number of digits, as long as they are integers.

This free big number calculator can perform calculations involving very large integers or decimals at a high level of precision.

Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

Free math problem solver answers your algebra homework questions with step-by-step explanations.