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Model DM12

Credit Card Size, Landscape
Model DM12


The DM12 is the top-selling business calculator, the size of a credit card. Its programming mode is very intuitive and works like a macro operation on a computer. Basically, the keys one would press in the calculating mode to arrive at a solution are entered in the programming mode along with logical operators (if, and, etc.) applicable to the solution. After the programming is complete, the macro will run in computation mode to save the user steps and improve accuracy. There are 99 lines of programmable memory on the DM12. Due to its simple operation for key financial calculations, the calculator long ago became the de facto standard among financial professionals.

Functions included for Statistics, Time Value of Money, Cash Flow Analysis, Amortization, Depreciation, Bonds and calendar functions:

  • Interest rate (i)
  • Present Value (PV)
  • Payment (PMT)
  • Future Value (FV)
  • Net present value (NPV)
  • Internal rate of return (IRR)
  • Accumulated Interest (ACC INT)
  • Straight line (SL)
  • Sum of the years digits (SOYD)
  • Declining balance (DB)
  • Bond price
  • Bond yield
  • Date arithmetic / calendar functions


Specification Details
Construction Case made from a sand-blasted Grade 1 Titanium housing
Software ARM microcontroller emulating the NUT processor
Processor LPC1115 32-bit ARM Cortex-M0 microcontroller
Memory 64 kB internal flash, 8 kB RAM
Display type Reflective Positive FSTN
Display resolution 132 x 16 pixels
Display active area 69.1 mm × 10.0 mm
Display dot pitch 524 µm × 626 µm
Connectivity (PC) USB Mini-A port for firmware update and data exchange via CDC
Battery type 1 × CR2032 lithium coin cell, 3.0 volts
Battery life Up to 5 years
Sound 4 kHz resonance frequency Piezo-electric buzzer
Size 88 mm × 59 mm × 7 mm
Weight 75 g
Warranty 5 years