---
product_id: 29568419
title: "DM15L RPN Calculator – HP 15C Inspired |Titanium Shell | Complex Numbers & Matrix | USB | Root-Solver"
brand: "swissmicros"
price: "C$34638"
currency: NIO
in_stock: true
reviews_count: 9
category: "Swiss Micros"
url: https://www.desertcart.ni/products/29568419-dm15l-rpn-calculator-hp-15c-inspired-titanium-shell-complex-numbers
store_origin: NI
region: Nicaragua
---

# USB for firmware & memory backup 5-year battery life (CR2032) Grade 1 titanium shell, ultra-durable DM15L RPN Calculator – HP 15C Inspired |Titanium Shell | Complex Numbers & Matrix | USB | Root-Solver

**Brand:** swissmicros
**Price:** C$34638
**Availability:** ✅ In Stock

## Summary

> 🧮 Elevate your calculations with Swiss precision and titanium resilience!

## Quick Answers

- **What is this?** DM15L RPN Calculator – HP 15C Inspired |Titanium Shell | Complex Numbers & Matrix | USB | Root-Solver by swissmicros
- **How much does it cost?** C$34638 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/29568419-dm15l-rpn-calculator-hp-15c-inspired-titanium-shell-complex-numbers)

## Best For

- swissmicros enthusiasts

## Why This Product

- Trusted swissmicros brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Next-Gen Display:** Enhanced 2-line FSTN display with verbalized errors and setup menu for intuitive use.
- • **Titanium Toughness:** Sand-blasted, anodized Grade 1 titanium housing for unmatched durability and premium feel.
- • **Pro-Level RPN Logic:** Classic 4-level stack with root-solving, matrix ops & complex numbers for engineering precision.
- • **Smart Macro Automation:** 99 programmable lines to streamline workflows and boost calculation accuracy.
- • **Future-Proof Connectivity:** USB port enables easy firmware updates and full memory backups—never lose your data.

## Overview

The SwissMicros DM15L is a premium, HP 15C-inspired RPN calculator featuring a rugged Grade 1 titanium shell, advanced programmable macros, and a modern 2-line display. Designed for professionals demanding precision, it supports complex numbers, matrix operations, and root-solving. With USB connectivity for firmware updates and memory backups, plus a 5-year battery life on a single CR2032, it’s a durable, portable powerhouse built to last a lifetime.

## Description

The DM15L is a high-end programmable calculator engineered for those who demand portability without sacrificing computational depth. While the original HP-15C was renowned for handling complex math in a slim form factor, the DM15L elevates this legacy with a precision-machined Grade 1 Titanium housing. This brown-anodized, sand-blasted shell is lighter and stronger than traditional materials, offering a professional aesthetic unique among computing tools. Designed for engineers and researchers, the DM15L provides a robust environment for matrix operations, numerical integration, and complex number calculations in a device that fits comfortably in a pocket. Performance through modern engineering. At its core, the DM15L runs a sophisticated ARM microcontroller emulating the classic NUT processor with improved speed. The latest V33 firmware update introduces a transformative 2-line display mode, allowing users to view opcodes during programming and access a comprehensive setup menu. With added catalogs for physical constants and unit conversions, the DM15L acts as a complete technical reference library. This tool is built for the field and laboratory, featuring a reflective positive FSTN display for maximum legibility in any lighting. A lifetime investment. We believe a calculator should be as durable as the equations it solves. The DM15L is a buy it for life instrument, featuring laser-engraved key legends that never fade and a high-end build quality plastic alternatives cannot match. The inclusion of a USB port allows for easy firmware updates and complete memory backups, ensuring your programs and data are always secure. Whether navigating inverse hyperbolic functions or managing complex multi-step programs, the DM15L provides the tactile feedback and mathematical certainty only a SwissMicros instrument can deliver. It is the ultimate tribute to a classic, refined for the modern professional who values precision and heirloom-grade craftsmanship.

Review: An HP Classic brought back to life! Quality re-make of essential tool. - Excellent re-make of the HP workhorse! I have been searching for years for an HP-15c calculator. All I could ever find for decent prices were used HP-11s units, which, while nice, are financial in nature and not really useful for my own engineering work. I love the landscape layout and RPN entry system. Once you learn and become used to this layout and entry method, "regular" calculators seem painfully clunky. SwissMicros makes these "clones", using the original HP microcode. This means they give the same results, and have generally the same 'quirks' that the original HP models exhibited. But with larger memory storage, 4x the speed, sturdy metal cases and wonderful clicky keys. They're firmware upgradable, include a real-time clock, user selectable operating speed (12Mhz or 48Mhz), three display fonts for your viewing pleasure and long battery life off a single CR2032 coin cell. Perhaps not the decades we got from the LR44/357's in the original HP models, but certainly many months or years depending on your usage patterns. Easy to replace when needed with four screws. Nice heft to the unit, feels very nice in your hands. The keys are clicky, giving very good tactile feedback on button presses, with a solid feel to the whole thing overall. Am I pleased with my purchase? YES, very pleased. Would I purchase again? OH YES! I actually have this unit on my desk, and a smaller version (the DM-15 credit-card sized) in my purse. Don't leave home without one!
Review: Carrying the torch that HP dropped - I like the DM15L as much as my HP11C. Faster and 40 years newer. Swiss Micros is about the only game in town for new RPN calculators. I collect them, I use them. I use the DM15L in my living room with the big TV while surfing the web. Handy for those quick calculations that don't require any programming. I always liked the Voyager (Landscape design). Screen is very readable. Buttons are fine. I also bought the DM15 credit card sized version which is a great novelty, but the buttons are too stiff to use as a daily driver. Cheerleading for Swiss Micros below: My HP41CV has broken posts, bad z-strips, and battery terminals. With manipulation, I can sometimes even get it to power on. My HP41CX is still in great condition except for the battery terminals. It faithfully powers on, but I know it will probably quit before I do. I got the DM41X masterpiece to replace those two. The DM41X improves on the HP41CX with many conveniences like the custom menu and USB interface that simply make the DM41X my daily driver on my desk. The custom menu supplants the plastic overlays from the 41's that let us repurpose seldom-used keys. The DM41X claims to support overlays, but didn't come with any, and my attempts to use a Cricut to create overlays for the DM41X have been promising, but ultimately disappointing largely due to the thin, flimsy overlay requirements. The old 41 overlays were at least three times thicker than what can be used on the DM41X/DM42. I have the HP 49 and the HP Prime (which will likely be my last HP), but my glory days were with the 11 and the 41 series. Swiss Micros understands that bond and has excelled in feeding my passion for these classic calculators.

## Features

- ELITE HP 15C RECREATION: The ultimate Voyager series tribute. Professional RPN logic with root-solving, numerical integration, and matrix power.
- GRADE 1 TITANIUM HOUSING: Rugged sand-blasted titanium shell with brown anodizing. Laser-engraved keys for lifetime durability and premium feel.
- INTUITIVE MACRO PROGRAMMING: Easily automate complex workflows with 99 lines of programmable memory and logical operators to improve accuracy.
- V33 FIRMWARE UPGRADE: Features an enhanced 2-line display, verbalized error messages, and a dedicated setup menu for easier configuration.
- USB DATA CONNECTIVITY: Integrated USB for full memory backups and firmware updates. Low-power design runs up to 5 years on a single CR2032 battery.
- PRECISION RPN STACK LOGIC: Features the iconic four-level stack and Reverse Polish Notation for faster, error-free calculations. The modern standard for Scientific and Financial professionals who demand a high-performance alternative to traditional entry.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DYUKK2K |
| Batteries | 1 CR2032 batteries required. (included) |
| Best Sellers Rank | #341,798 in Office Products ( See Top 100 in Office Products ) #188 in Scientific Calculators |
| Customer Reviews | 3.9 3.9 out of 5 stars (101) |
| Date First Available | April 7, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 12.8 ounces |
| Item model number | DM15L |
| Manufacturer | SwissMicros GmbH |
| Package Dimensions | 8 x 4 x 1 inches |

## Product Details

- **Brand:** SwissMicros
- **Calculator Type:** Engineering/Scientific
- **Color:** brown
- **Power Source:** Battery Powered
- **Screen Size:** 2.4 Inches

## Images

![DM15L RPN Calculator – HP 15C Inspired |Titanium Shell | Complex Numbers & Matrix | USB | Root-Solver - Image 1](https://m.media-amazon.com/images/I/51bqm7yzwQL.jpg)

## Questions & Answers

**Q: What is the case back made of, and is there an option to have it without anodizing?**
A: The case is made of Titanium and they are all anodized.

**Q: Are the keys the same "slanted" shape as the original? That was one of my favorite things about it.**
A: They are almost the same shape.  The top surface has the same tilt.  however, the part of the key with the 2nd function label in blue on original has it's own more deeply angled surface.  the top of keys on the DM15L is flat and has the blue labe on top.

**Q: So if this swiss made calculator is an much improved version of the 15c why does it have a usb port and what's it used for?**
A: Back in the day of the 15C the device programming was physically built into the circuit board.  The processor was electronically "engraved" with the operating instructions.  Modern chips are a blank slate. You build the device then load the programming into the chip.  That chip can do many things, not just be a calculator. The port is there for use at the factory.  That's where they load the operating instructions (firmware) into the device so the chip inside knows that it is now a calculator and how to go about doing that job.  The port has no end user purpose.

**Q: Can you store in the recall key and store key like you can with a hp 32s ii?**
A: Sorry, I don't know the HP-32sII well enough.
The HP-15C / DM15L can store values in many registers, but not in keys.
I hope this answers your question. Otherwise please rephrase.

## Customer Reviews

### ⭐⭐⭐⭐⭐ An HP Classic brought back to life! Quality re-make of essential tool.
*by L***. on April 29, 2017*

Excellent re-make of the HP workhorse! I have been searching for years for an HP-15c calculator. All I could ever find for decent prices were used HP-11s units, which, while nice, are financial in nature and not really useful for my own engineering work. I love the landscape layout and RPN entry system. Once you learn and become used to this layout and entry method, "regular" calculators seem painfully clunky. SwissMicros makes these "clones", using the original HP microcode. This means they give the same results, and have generally the same 'quirks' that the original HP models exhibited. But with larger memory storage, 4x the speed, sturdy metal cases and wonderful clicky keys. They're firmware upgradable, include a real-time clock, user selectable operating speed (12Mhz or 48Mhz), three display fonts for your viewing pleasure and long battery life off a single CR2032 coin cell. Perhaps not the decades we got from the LR44/357's in the original HP models, but certainly many months or years depending on your usage patterns. Easy to replace when needed with four screws. Nice heft to the unit, feels very nice in your hands. The keys are clicky, giving very good tactile feedback on button presses, with a solid feel to the whole thing overall. Am I pleased with my purchase? YES, very pleased. Would I purchase again? OH YES! I actually have this unit on my desk, and a smaller version (the DM-15 credit-card sized) in my purse. Don't leave home without one!

### ⭐⭐⭐⭐⭐ Carrying the torch that HP dropped
*by J***T on November 2, 2021*

I like the DM15L as much as my HP11C. Faster and 40 years newer. Swiss Micros is about the only game in town for new RPN calculators. I collect them, I use them. I use the DM15L in my living room with the big TV while surfing the web. Handy for those quick calculations that don't require any programming. I always liked the Voyager (Landscape design). Screen is very readable. Buttons are fine. I also bought the DM15 credit card sized version which is a great novelty, but the buttons are too stiff to use as a daily driver. Cheerleading for Swiss Micros below: My HP41CV has broken posts, bad z-strips, and battery terminals. With manipulation, I can sometimes even get it to power on. My HP41CX is still in great condition except for the battery terminals. It faithfully powers on, but I know it will probably quit before I do. I got the DM41X masterpiece to replace those two. The DM41X improves on the HP41CX with many conveniences like the custom menu and USB interface that simply make the DM41X my daily driver on my desk. The custom menu supplants the plastic overlays from the 41's that let us repurpose seldom-used keys. The DM41X claims to support overlays, but didn't come with any, and my attempts to use a Cricut to create overlays for the DM41X have been promising, but ultimately disappointing largely due to the thin, flimsy overlay requirements. The old 41 overlays were at least three times thicker than what can be used on the DM41X/DM42. I have the HP 49 and the HP Prime (which will likely be my last HP), but my glory days were with the 11 and the 41 series. Swiss Micros understands that bond and has excelled in feeding my passion for these classic calculators.

### ⭐ Faulty Disply
*by B***K on July 27, 2021*

I purchased the Swissmicro DM15L, and the calculator was great at first, a good equivalent to the HP 15C. I have an HP that is over 20 years old and works with no problems. The DM15L display is going out; there are several dead pixels spot; at first, no big deal, now it is interfering with the actual number display. Since it is still under warranty, I reached out to Swissmicro support with no response; I emailed them again a month later and included several other Swissmicro employees, and still no response. Now the calculator is useless! I have given the rating purely based on customer service or their lack of customer support and would not recommend their product due to lack of customer support.

## Frequently Bought Together

- SwissMicros DM15L RPN Scientific Calculator – HP-15C Inspired Upgrade with Programmable Functions, Complex Math, Matrix Support, and Stainless Steel Design
- Faber-Castell 0.7mm 2B Super Polymer Premium Strong Dark Smooth Leads Mechanical Pencil Lead Refills For All 0.7 mm Mechanical Pencils (4 Tubes, 24 Leads Per Tube - Total 96 leads)
- Pentel GraphGear 1000 Mechanical Pencil, (0.5mm) Point Size, Black Barrel, 1 Each (PG1015A)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-03*