About CalculatorX

CalculatorX is a free library of calculators, converters, and concise reference pages. Our goal is simple: help you get from a question to a clear answer without friction.

We cover math, finance, electrical engineering, unit conversion, time & date tools, and everyday utilities. Many pages run entirely in your browser—no sign-up required.

This site preserves the long-running CalculatorX.com tool library while introducing a clearer design, faster navigation, and rebuilt high-traffic calculators such as Amps to VA and Ohm's law.

If you are looking for a specific tool, use search (⌘K) or browse by category from the homepage.