12C Financial Calculator – 120+ Functions: TVM, NPV, IRR, Amortization, Bond Calculations, Programmable Keys (HP)

I have been using the HP 12C for over 20 years, and its enduring quality is absolutely legendary—my original units are still working perfectly today. This calculator is a durable, reliable workhorse that covers all the critical functions needed for finance: Time Value of Money (TVM), NPV, IRR, Amortization, and Bond Calculations. Comparing it to modern devices, it's interesting to note how much faster technology has become. On older HP 12C models, running complex calculations like the Internal Rate of Return (IRR) would often display the "running" indicator for a noticeable period. The newer calculators are so incredibly fast that this indicator no longer appears, completing the task almost instantaneously—a small detail that highlights the HP 12C's incredible tenure in the market. The most important thing to note before purchasing is the requirement to use Reverse Polish Notation (RPN). This is a different input method than the standard algebraic method you might be used to. Instead of typing "2 + 2 =", you input the numbers first and then the operation: "2 [ENTER] 2 [+]." There is a learning curve, but once mastered, RPN is far more efficient and reduces the chance of input errors. It’s what makes the 12C a favorite among financial professionals. This is a fantastic, indispensable tool that I highly recommend for anyone serious about personal finance or real estate.

The old and useful HP calculator that I keep with me everywhere. No issues and great delivery.

There are many GBs of web pages devoted to the HP12c. Suffice it to say this is a brilliant financial calculator and I recommend it to anyone working in finance or banking. Yes, the spreadsheet is much more powerful and thanks to our phones, very portable. But this is designed to fit in your short pocket. The level of design is immense. The HP 12c has remained in production since 1981 and the user interface is unchanged. However, this version of the HP12c is super fast (it unofficially referred to as the HP12C+). The original physical technical architecture no longer exists so the software runs on an ARM chip. The batteries may not last as long (we are talking months… not daily recharging!) but I will take the speed any day. These calculators do not come with a manual but you can download the VERY comprehensive manual from the web. There is also an advanced manual called the solutions manual. These books are mini finance courses which introduce you to the HP12c. The calculator uses RPN. If you have used it, you will love it. If not, it is odd… but no one will ever take your calculator at a meeting. You need to learn RPN (there are videos to explain) but if you work through the instructions you will do that in no time… the trouble will be going back (it is faster than conventional calculations). You can write simple keystroke programmes for this calculator. This can be useful but in all of my years of using the HP12C, I have not written any elaborate programmes. These calculators can be “flashed” with a special cable (there is a socket in the battery compartment). I have not done this so I cannot comment on the process. The build quality is very good. These calculators are made in the Philippines. For this price, the HP12C is amazing value.

I've purchased several of these Financial Calculators over the years. We use them at work and they are great!

Ordered from a different seller and it was clearly a knockoff. Keys would double or triple enter. This on works perfect and original packaging from what I can tell.

This one is great, same feel and quick button action of the original of thirty years ago!

Excellent, great replacement for my old one from 1990. UPDATE Oct 2025, this works well some/most of the time but it sometimes skips a number entry while giving the feel it’s been entered, eg adding up a bunch of numbers. It has thrown me off a few times and that’s been frustrating. I recommend only using it on a very hard surface and paying close attention to numerical entries. Double check your computations. Bummer it’s brand new and not reliable. My HP12 from late 1980s is better, but I needed a second one and didn’t want to chance buying used.

As a mortgage loan officer, I work with numbers all the time. I love the way this calculator works. Once you get used to it, you never wanna go back to old school calculators. This is my third one.

Produto de ajuda do dia a dia. Material de excelente qualidade.

計算機としての機能は十分であるものの、最近、液晶表示の右から４桁目の液晶の8本のバーのうち、2本が表示されなくなった。落下等の衝撃を与えたことはないので、単純な劣化と考えられるが、部品の耐久性に問題がある。

Gostei do produto

The HP12C is legendary for a reason. It remains the gold standard financial calculator for anyone wishing to learn how to use it. I can't think of many other products that have remained unchanged after 36 years of continuous production. In a moment of weakness some years ago I purchased the 12C Platinum. Never again, I quickly swapped back to the 12C this purchase replaced (and only because my bag was stolen on a train just before Christmas). The 12C is not just for oldies on a nostalgia trip, learning/using RPN and manipulating the stack is a productive mental work out in its own right. I think HP have addressed the quality issues that plagued some machines a few years ago. Mine has a solid feel to it and the keys have that positive 'i've pushed it' feed back sensation. The enter key works wherever on the key it is pushed. Personally I find the display easier to read than the 12C Platinum, but this may not be the case for everyone. From experience I know the 12C has a tremendously long battery life measured in years (between 3 and 5 according to use) augmented by a built in turn off function after around ten minutes of inactivity. The landscape orientation of the keyboard ensures much greater stability when holding to use versus the all but ubiquitous portrait format style of other calculators. This feature greatly reduces the risk of keystroke error when the machine is not being used while placed on a desk top surface for example. The housing or body of the HP12C has an inherent slope as it is thicker at the top than at the bottom. This makes the LCD display clearer and crisper to read. I found the slightly sepia LCD display background deals with office lighting glare better than the blue/grey backgrounds normally found on other calculators and also HP's 12C Platinum. It probably sounds a bit geeky to bang on about a calculator but if you do have to use one, you owe it to yourself to own one that at the very least you can enjoy at the same time. HP12C £49.99 - the look of confusion on a colleagues face "just borrowing your calculator err where's the = button, umm how does this work" - PRICELESS.

Just as I remembered it. This sis a very good product.