About CalculatorX

CalculatorX helps you get from a question to a trustworthy answer—fast.

Our tagline is simple: Calculate anything. Verify everything. Every tool is built to show not only a result, but the formula, assumptions, and units behind it, so you can check the math instead of trusting a black box.

What you will find

• Calculators — electrical power, Ohm’s law, finance, math, and other practical solvers
• Converters — units for length, temperature, energy, and more
• Dev — Base64, URL codecs, color tools, and developer utilities
• Apps — lightweight browser utilities such as notepad, timers, and charts

Most tools run entirely in your browser. No account. No upload of your inputs for the calculation itself.

Who it is for

Students, engineers, finance users, developers, and anyone who needs a quick, inspectable answer. Pages are written so both people and AI agents can read the method, not just the number.

How to start

Use search (⌘K), pick a category from the homepage, or jump straight to a popular tool like Amps to VA or temperature conversion.

Developer platform (beta)

Deterministic engines powering many calculators are also available over HTTP and MCP for agents and integrations. Start here: CalculatorX Developers. Agents should follow For AI agents.