About CalcDrive
CalcDrive is a collection of free online calculators for everyday maths, money, dates, unit conversion, building projects and crypto. It is built and operated by Arongame Studio, an independent software studio. There is no account, and calculations run in your browser.
How the calculators are built
Every calculator shows the formula it uses, a worked example with real numbers and the main caveats, so you can check the result yourself instead of trusting a black box. Formulas are implemented in plain JavaScript and covered by automated tests that compare results with known values.
What we do and do not promise
- Results are estimates for planning and learning, not professional financial, medical, legal or engineering advice.
- Loan, mortgage and compound-interest results assume fixed rates and regular payments; real offers include fees, insurance and lender rounding rules.
- BMI is a rough screening number and does not diagnose health.
- Crypto rates are values you type in; CalcDrive does not show live prices or give investment advice.
Languages and translations
CalcDrive is available in nine languages. Translations were produced with the help of AI and have not yet been reviewed by native speakers; if a translated page looks wrong, please tell us.
Corrections and contact
Found a wrong result, a typo or a confusing explanation? Write to us and include the calculator name and the numbers you entered: arongame.studio@gmail.com