The SwissMicros DM42N is a programmable RPN calculator inspired by the HP-42S. It runs a 34-digit decimal math engine on dedicated hardware enclosed in a CNC-machined 316L stainless steel body.

Hardware Specifications

Specification	Detail
Calculator type	Engineering / Scientific
Housing	CNC-machined 316L stainless steel, matte black
Display	2.4" dot-matrix LCD
Display type	LCD
Layout	Portrait, tactile key spacing
Connectivity	USB-C
Power source	Battery
Battery	1 × CR2 (included)
Battery life	Up to 5 years
Dimensions	5.7" L × 3" W
Weight	180 g
Color	Black

Software Specifications

Specification	Detail
Entry mode	RPN (Reverse Polish Notation)
Decimal precision	34-digit floating-point
HP-42S compatibility	Inspired by HP-42S architecture
Solver	Integrated matrix solver
Functions	Complex numbers, statistics, matrix operations, integration

Authorized SwissMicros Retailer. All units sold by TheCalcStore are genuine SwissMicros products covered by the manufacturer warranty.

Returns accepted within 30 days. See our Return & Warranty Policy for full terms.

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SwissMicros DM42N