Simple Calculator
Everyday math operations. Fast, clean, and with on-screen history.
Scientific Calculator
Advanced functions: trigonometry, logarithms, roots, and powers.
Auto Loan
Discover the exact installment amount for your next car or motorcycle.
Mortgage
Compare amortization tables and find out the minimum income for your property.
Compound Interest
Simulate your wealth growth and see the power of compound interest on your investments.
Graham Fair Price
Estimate a stock's fair price with Benjamin Graham's two formulas.
About QualValor
Free financial and math calculators that run right in your browser, with no sign-up. Each tool explains its formula, shows a worked example and tells you when the result can mislead.
- Loans: estimate the payment and true cost of an auto loan or a mortgage.
- Investing: compound interest and the Graham fair price of a stock.
- Everyday math: simple and scientific calculators, with history.
Learn more about the project.