About Us

About Cálculo Confiável

Cálculo Confiável (Reliable Calculation) it's a project created with a simple, yet essential purpose: to make knowledge accessible and useful for everyone, in a clear, free and reliable way.
Here you'll find a large collection of online calculators and converters, designed to solve real-life everyday situations — from engineering and electronics calculations to finance, real estate, household utilities, time, energy, and much more.

The idea stemmed from the need to bring together, in one place, truly accurate tools, without relying on complicated spreadsheets, paid apps, or websites full of ads.
Each tool on the site was developed based on tested technical concepts, official formulas, and practical application, so that anyone—whether a student, professional, or simply curious—can achieve the right result with just a few clicks.

An independent project, made with dedication.

The site is the result of many tests, studies, and personal experiences. Each calculator was created manually, analyzing the formulas, testing the results, and adjusting the design to make its use as intuitive as possible.
Nothing here is automatic or copied: every detail was carefully thought out, line by line of code, with the goal of delivering something functional and accessible.

The name Cálculo Confiável (Reliable Calculation) was not chosen by chance — it perfectly represents what the project seeks to offer: tools that the user can trust..
No complications, no "tricks," no need to log in or pay a subscription. Just straightforward calculations, with explanations and theoretical basis for anyone who wants to understand how the result was obtained.

Applied knowledge, not just theoretical knowledge.

Many of the calculators and converters were inspired by real-life situations, the kind we face every day.
Simple problems, but ones that require precision — such as calculating the fair value of a rental, figuring out the ideal size of a radio antenna, converting electrical measurements, estimating adjustments, comparing units, or simply understanding a formula clearly.

Therefore, in addition to showing the result, several tools explain the theory behind the calculations, their practical application and, when possible, the source of the formula.
The goal is for the user not only to obtain a number, but also to understand the reasoning — learning while using the site.

Constantly evolving

The Cálculo Confiável (Reliable Calculation) is in continuous expansion.
New calculators, converters, and features are being created and improved as people submit suggestions or show interest in specific topics.
The focus is always the same: to make accurate calculations easily accessible, clearly and simply, without requiring advanced knowledge.

The site currently features dozens of tools and continues to grow with each update. The idea is that, over time, it will become true digital library of practical utilities, bringing together topics ranging from engineering and electronics to everyday, financial, and educational tools.

Free, reliable, and without barriers.

One of the fundamental principles of Reliable Computing is to maintain free and open access.
All content is made available openly, without intrusive ads, mandatory registration, or time limitations.
We believe that knowledge should be shared, and that useful tools can transform the way people solve simple everyday problems.

Furthermore, all pages are optimized for fast loading, both on computers and mobile devices, allowing the user to have the same experience of precision and practicality on any device..

A personal message

This project was born from a love of creating, learning, and sharing.
As a technician and enthusiast of electronics, computing, and engineering, I have always found in practice a way to combine curiosity and usefulness.
Cálculo Confiável (Reliable Calculation) is, above all, a reflection of this — a space created with dedication so that other people can also use, learn from, and trust it.

If any of the tools helped you, saved you time, or taught you something new, then the purpose is being fulfilled.
And if you'd like to suggest improvements, new calculators, or even report something that could be enhanced, feel free to get in touch.
Ultimately, shared knowledge is multiplied knowledge.

Thank you for visiting the site and being a part of this project.
Welcome to Cálculo Confiável (Reliable Calculation) — where every number has meaning, and every calculation is designed to be truly useful.