CalculatorNews (calculatornews.com) is a free, ad-supported online calculator built for two audiences that do a lot of arithmetic: engineering students and people who work with money across borders.
The app includes a standard and scientific calculator with keyboard support, a unit converter (length, weight, temperature, area, volume, pressure), a currency converter for the major world currencies, and a salary-after-tax calculator that estimates take-home pay in 26 countries. It is available in 10 languages and works on any modern browser without sign-up.
Articles and reference tables are written to be reproducible: every worked example can be re-run in the calculator. Tax and exchange-rate figures are clearly dated and marked as estimates. We do not provide financial, tax or legal advice — figures are for orientation and you should confirm exact numbers with an accountant, your HR department or your bank.
Corrections, questions and partnership enquiries: see the contact page.