Sharp EL344RB 10-Digit Calculator with Punctuation, Metric Converter, Solar Powered LCD Display, Small Pocket Calculator for Students and Professionals by Sharp

Happy circumstance: I remember enough arithmetic from my school days, to do basic calculations with pencil and paper, or in my head (cashiers are always amazed … 😎 ).
But as an American interested in European and world affairs, the calculations I cannot do easily are: American measurements to Metric, Metric to American. A never-ending source of annoyance.
This little calculator solves the problem very well. Must own 4 of them (2 I can’t find: also annoying).
My only criticism would be: the labels for the various types of calculation can be difficult to read, because I have to take off my glasses (very near-sighted, and getting to an age, sad to write …).
Definitely a “Don’t leave home without it!” gadget. Also much handier than the iPhone.

I bought it for its metric conversion capabilities, and it does that very conveniently. It is compact and versatile.

This calculator is still working. I am retired now for 10 years and it still works!. Perfect size for a pocket. Battery still works.

First and most important is the dimensions they list on Amazon are twice as large as the actual calculator. Keys and screen are way too small. I bought based upon listed measurements.

Second, I need metric conversion. Guess what? It does have a millimeter to inch conversion. That is what I use everyday in my wood shop. OMG

The actual dimensions are: 4 11/16″ high & 2 3/8″ wide. That is far short of the stated: 7.5 x 4.63 x 0.5 in

If you want a dinky calculator with metric missing millimeters, then go for it.

This is a normal calculator with the addition of many function buttons for converting between metric and imperial measurements, e.g., square meters to square feet, liters to gallons, km to miles, lbf./sq. inch to kilopascals, Fahrenheit to Celsius, kilocalories to kilojoules, and many others. This involves pressing the number in question, a to metric or from metric key, and the function key appropriate to the conversion desired; a bit awkward but reasonably quick anyway. There are 22 different conversions available (though one I would have liked that wasn’t there was lbf. to newtons). The calculator itself is both solar and battery powered and has basic math functions, though it would have been more useful to me if it had an ability to do exponents other than square roots. As it is, a nice device to have handy, especially if you find a scientific calculator too complicated.