Calculated Industries 4400 Tradesman Calc Trades Math and Conversion Calculator

Very useful for instant Metric to Imperial measurements, and vice versa. Functions well as a scientific calculator

Love it

I've only scratched the surface of this one, but I already love it. Unlike many other Calculated Industries products, with many highly specialized functions, this is pretty much a standard scientific calculator that has the awesome ability to work directly in different units. It has trig, square, square root, etc. This is what I was looking for.You can work in US units, like:decimal yards, feet, inchesfeet+fractional inchesfractional inchesAlso, others like pounds, kilograms, mm, m, etc.It has basic dimensional analysis. You don't just plug numbers in and hit a conversion key, it actually keeps track (to a point) of the units for you. For example, 25.4mm and 1 inch are basically the same thing. I can enter 25.4mm times 8 feet, and get a result in square feet - it's smart enough to know what you mean. It does not appear to let you mix units, like lb-ft, for example.It comes in a hard removable case, and has a well written instruction booklet that fits into a slot in the back.

Item was defective out of the box. Ordered this product in July for school which started in September, did not have to use the calculator until a day ago and found out it was not working at that time. Amazon would not return the product as it was out of the return period so now i will have to purchase the calculator again not happy with the service on this order.

Purchased for a friend. Fast delivery needed for welding school!!