SwissMicros
R47 Scientific Calculator
R47 Scientific Calculator
R47 Scientific Calculator
R47 Scientific Calculator
R47 Scientific Calculator
R47 Scientific Calculator
R47 Scientific Calculator
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Scientific, Programmer, Financial

R47 Scientific Calculator

CHF 259.00

The R47 is a powerful, RPN-based programmable scientific calculator with an extensive feature set. Its software has been refined over many years, born from the vision of a dream calculator developed by a team of engineers and mathematicians, all dedicated calculator enthusiasts.

Community-developed and manufactured by SwissMicros, the R47 runs firmware that is functionally identical to that of the C47, which offers a way to transform a DM42n into a feature-rich RPN calculator using a dedicated keypad overlay.

The C47/R47 firmware originated as a fork of the WP43 project, itself derived from the WP34S. A core component carried through this lineage is the decNumber library by Mike Cowlishaw for precise decimal arithmetic.

I understand that the R47 firmware is not written, distributed, or maintained by SwissMicros, and I agree that any support for the R47 firmware will be requested and handled by the R47 team via email to support@47calc.com. Please see the documentation at https://47calc.com/

The software (firmware) is currently in beta.

R47 Scientific Calculator calculator features

  • Solve equations and systems of equations
  • Perform numeric definite integration and derivatives
  • Matrix and vector operations including eigenvectors, generalized norms, and specialized support for 2-space and 3-space operations
  • Work with complex numbers which utilize unambiguous notation and are supported for virtually all operations
  • Base-n arithmetic with extensive bitwise logical operators
  • Provides 34 digits of precision; exponents to ±6144; up to 1000 named variables
  • Include scientific functions such as trigonometric, hyperbolic, logarithmic, and exponential functions, plus advanced special functions.
  • Support advanced functions including Bessel, Riemann zeta, Beta, and related functions, with broad support over the complex plane.
  • Feature extensive statistics, including 2-variable statistics, best-fit modelling, a large set of distributions and their inverses, and basic plotting.
  • Create programs using a multi-line editor.
  • Be keystroke programmable with tests, flags, looping, and branching.
  • Conduct financial and date-based calculations, including time value of money operations.
  • Apply built-in unit conversions and a library of constants.
  • Perform date and time math, as well as built-in clock functions.
  • Include an equation writer with support for solving, numeric integration, derivatives, and basic plotting.
  • Support factoring and other operations on 1000-digit integers.
  • Include built-in electrical engineering applications, such as three-phase calculations.
  • Feature 8 stack levels, 3 rows of menus, and an always-on status bar.
  • Offer user-customizable keyboard and softkey-based menus.
  • Restore states, programs, and configuration via USB-C.
  • Maintain backwards compatibility with HP-41 and HP-42 workflows.

R47 Scientific Calculator hardware features

  • A USB-C connector for complete and easy calculator contents backup
  • Sleek and sturdy hardware based on a stainless steel shell
  • Fast STM32U5 CPU
  • Single coin-cell operation
  • Low power - long battery life