CT Wizard — Free Math, Money, DIY & Sanity Calculators

CT Wizard is a free collection of more than thirty interactive calculators and tools that run entirely in your browser. There is nothing to install and no sign-up required. Work out a loan payment, split a tip, convert units, estimate board feet for a woodworking project, lay out an electrical panel, or procrastinate productively with the Sanity Preservation Suite.

Categories of tools

Every tool is free, private, and works on desktop and mobile. Your inputs never leave your device.