Home Project Toolkit is a free utility platform for homeowners, DIYers, and contractors. We built it because most calculator sites are cluttered, slow, or stuffed with thin content that exists only to target keywords. We wanted the opposite: a clean, fast, professional toolbox where every tool is genuinely useful and every page explains the math behind the result.
Every calculator on this site ships with the underlying formula, a worked example, and the assumptions baked into the result. The calculators are server-rendered for speed and SEO, work on mobile and desktop, and connect to related tools so you can move naturally between project planning steps without losing context.
We don't sell your data and we don't gate the calculators behind a sign-up. The site is supported by ads in clearly marked placements that never interfere with tool functionality.