Calculators and utilities

This page is an index of calculators and utilities for the Web and mobile platforms.

RPN calculators
Emulators of "Voyager" HP-10C series

12C

Web HP-12C emulator
Web HP-12C Platinum emulator
Touch RPN for Android   (em português)
Touch RPN for iPhone   (em português)
Touch Fin extension for Chrome and Edge

12C with Black‑Scholes

Web BS-12C
Touch RPN for Android
Touch RPN for iPhone

11C

Web HP-11C emulator
Touch RPN for Android
Touch RPN for iPhone

10C

Web HP-10C emulator
Touch RPN for Android
Touch RPN for iPhone

15C

Web HP-15C emulator
Touch RPN for Android
Touch RPN for iPhone

16C

Web HP-16C emulator
Touch RPN for Android
Touch RPN for iPhone

Financial calculators

Damn simple financial calculator

Other calculators

Simple Black-Scholes calculator
Black-Scholes calculator
Option writing margin estimator

Utilities and toys

Biorhythm
Photo Friend: exposure calculator & light meter
Morse code player
Learn Morse using the Koch method

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