About RivoCalc
What it is
RivoCalc is a free calculator hub made in Portugal and built for the U.S. market. We built these tools because most of what's out there is generic — the wrong units, no local context, examples that don't match how Americans actually build, budget, or shop.
How it works
Every calculator is free and doesn't require sign-up. Enter your numbers, get your result. No intrusive ads, no personal data collected, no dark patterns.
How we verify our formulas
Every RivoCalc calculator is built on a formula derived from verifiable sources: official technical standards, documentation from public agencies, and specifications published by manufacturers. The sources used for each calculation are listed right on the calculator's page, next to the formula, and every page shows the date it was last updated. When a standard is revised or an error gets reported, the formula is corrected and the date is updated.
Read the full methodology →We're starting with Home Improvement
Our first category covers home improvement and renovation — paint, concrete, tile, project costs. New categories are in the works: finance, health, conversions, and everyday life.
Contact
Have a suggestion, found an error, or want to propose a calculator? Write to us at info@rivocalc.com