About QualValor
QualValor is an independent project of free financial and math calculators, built to help you make everyday decisions with clear numbers.
What we do
We bring together loan simulators, investment tools and everyday calculators in one place. Each calculator explains its formula, shows a worked example and warns you when the result can mislead.
How calculations work
All calculations run in your own browser. The numbers you type are not sent to us or stored. Some calculators follow Brazilian rules, and each page says so.
How we check results
Formulas follow the public rules for each topic and the original literature for investment methods, such as Benjamin Graham's. Calculators are checked against independently calculated examples, and errors reported by visitors are fixed first.
What QualValor is not
We are not financial advisors and do not recommend securities. Results are educational estimates that depend on the numbers you enter. Before important decisions, check the terms with your financial institution or a licensed professional.
How the site is funded
QualValor is free and supported by ads. If we ever add partner links, they will be clearly labeled.
Contact us
Found a mistake or want to suggest a calculator? Use the contact page. Corrections come first.