Free online calculators
fazAconta — Portuguese for "do the math" — is a Brazilian calculator site online since 2008. This is its English corner: the tools people kept finding in Portuguese and asking for in English, each with a real, working calculator and a step-by-step explanation. Pick one below.
Financial calculators
- HP 12C Online Calculator — a faithful emulator with the real keyboard and RPN stack
- Online Calculator — scientific and financial, with instant results
Excel & reference
- Excel Function Translator — every function in Spanish and Portuguese
- Roman Numerals — converter, reference chart and quiz