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Great for designers, woodworkers, craftsmen, technicians, etc. Calculates directly in feet, inches, fractions, yards, meters, centimeters, and millimeters, including square or cubic formats of each. Converts to and from all dimensional formats instantly. Instant solutions for circumference, circle area and arc lengths. 1 button solves postholes, columns, pillars, arches and much more. Weight per volume key allows you to find weight of material (i.e., tons per cubic yard, kilograms to pounds, etc.). Custom set fractions. Estimate material costs. Paperless tape allows you to review last 20 entries.
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Ideal for faster more accurate material estimates (view larger).
Get professional results every time with the handy, easy-to-use tool Measure Master Pro measurement conversion calculator (model 4020) from Calculated Industries. It's ideal for designers, craftsmen, tradespersons, fabricators, woodworkers, and technicians for on-the-spot calculations, and it fits easily in a pocket, briefcase, or tool pouch.
Built-in functions make the Measure Master Pro ideal for faster, more accurate material estimates. Work in and convert between dimensional formats including feet-inch-fractions, decimal feet-inch-fractions, yards, meters, centimeters and millimeters as well as areas and volumes. You'll also be able to quickly find board feet for lumber estimates and solve for circumference, circle area, and arcs.
Other features include solving for cost per unit, a "paperless" tape that lets you review the previous 20 entries to double-check your totals, ability to store preferred fractional values and dimensions, and work with standard calculations.
It's powered by two LR44 batteries, and the Measure Master Pro has an auto shut-off feature that turns the calculator off after about 8 to 12 minutes of non-use. The calculator measures 2 x 5.6 x 0.6 inches, weighs 4.5 ounces, and comes with a hard protective cover. It's backed by a one-year limited warranty.
What's in the Box
Calculated Industries 4020 Measure Master Pro measurement conversion calculator; protective hard slide cover; pocket reference guide (English/Spanish); batteries
Laksh.M
Reviewed in the United States on May 26, 2025
If you're moving to the US for work from abroad, this calculator is an absolute must-have! It’s incredibly helpful for converting imperial measurement units to US measurement units with ease.This tool saves time and eliminates confusion. It’s user-friendly, accurate, and makes adapting to the US measurement system much smoother. Don’t start your new job without it! It’s easy to fit in your pocket and it is water proof too.
Dylan
Reviewed in Canada on September 4, 2024
So simple for converting measurements back and forth.
Brian Beck
Reviewed in the United States on April 6, 2024
I am loving this calculator, perfect for any woodworker. Calculates board feet, easily calculate fractional inches, even doing conversions. Good visibility, pretty intuitive and easy to use, I keep it on my outfeed table/assembly bench and would highly recommend it!
richard Curry
Reviewed in the United States on April 26, 2024
I had an issue with the numbers a year after i purchased it. The customer service was stellar and easy to work with. They have shipped my replacement, love this company
Customer
Reviewed in the United States on February 26, 2022
The previous foot-inch calculator that I bought in 1985 finally bit the dust. It was sort of a shame I had to buy a new one, with so little time left in my work career, but if that "primitive" version, also by Calculated Industries, lasted so long, I would hope that the new one would too.It works just fine, but the older version had a single button for "Convert to," which the new version does not have. But if you double click the "foot" key, it switches from a decimal feet (say, 5.5') to foot/inches (say, 5'-6").Also a plus, the hard, slip on back shell can be reversed to be a hard cover for the front of the unit during transit. My old calculator, with a soft cover, occasionally turned on during transit, using up battery life.
just me
Reviewed in the United States on October 7, 2021
Working in an engineering office, I need this. I'd used the ProjectCalc (also by CI) for 20 years. I bought it for $9 at the big blue retailer (you know the one with its own quirky set of meme-worthy shoppers showing more unsightly butt and bosom crack than anyone has ever wanted to see). It still works but the keys have gotten a little lazy so I invested in this one. It works really well. The only complaint I have about the Measure Master Pro calculator is that I wish it had the attached cover so the unit opens like a book. On the ProjectCalc, the cover folds all the way back behind the calculator. the Measure Master Pro's cover has to be slid off the front and slid onto the back side. What I don't like about that is that the fit is so tight it's not easy to pry it down so it can slide of, no matter what side it's on. As a result (and the picture shows this) I've had to not slide the cover fully on so it's easy to remove. Technically, I don't have to do that. I could just leave it on my desktop and it'll be fine. But I'm to obsessive-compulsive to do that so I have to close it and put it in its place in the top drawer. Normally, I suppose having the cover not fully on is ok, but, again, I'm too OC for that. Some things, you just have to live with, though, and, in the grand scheme of things, it amounts to a whole lot of nothing, so I can overlook that and not let it affect its rating. How the calculator functions is, by far, more important, and it functions as intended and well.
MR
Reviewed in the United Kingdom on June 20, 2020
Takes some getting used to but very powerful tool for tradesmen
Customer
Reviewed in Mexico on July 16, 2018
Funciona muy bien
Customer
Reviewed in Canada on December 22, 2018
I use this calculator in my shop for kitchen cupboards measurements and also when drawing house plans.It works well and stays clean free of dust with the slide cover.
Customer
Reviewed in India on May 23, 2017
V good
G. Linn
Reviewed in the United States on May 18, 2011
I was in the process of using some Blum drawer slides which are manufactured in Europe. Specifications are metric with some metric to english (inches) conversions provided. I could have easily determined a milimeter to inch conversion factor but why should I have do this manual conversion again and again with the possibility of making an error due to keying in something incorrectly? I first went online. I expected that there would be "free" metric to english conversion programs. There are, but, some are quite old. Some want money but provide more capability than needed. Would the older software work correctly with my newer, Windows 7? Some were free but online and "collected" data from your online usage. Who needs that snooping? I once had a calculator that would convert back and forth so I started looking for calculators. This calculator not only solves my first problem, it also helps me in my woodworking shop by working with fractions and by converting decimal values to fractions. For example, I use a digital micrometer to makes measurements. The result is in decimal values such as .625. But what is this in equavalent fractional inches? This is an easy "head number", 5/8. But other fractions are not quite so familiar. With this calculator, you can easily convert from a decimal number to a fraction. I haven't used it for very long but I expect it to make my woodworking projects less prone to error. I think the price was also quite reasonable for a special purpose calculator.
Richard R
Reviewed in the United States on September 12, 2009
This is a good product that does exactly what I expected.But, it only came with a Spanish language User Guide, which is obviously a packaging error because everything else, including the box, is in English. When I registered the product with Calculated Industries I requested an English version, but I'm still waiting and it's been several months.The "electronic paper tape" is useful for review of entries, but it would be much more useful if it allowed individual entries to be edited. Unfortunately, you have to re-enter the entire list if there is one error. I also have an HP 17BII business calculator (that died after 20 years) which keeps long summation lists in memory, and allows editing of individual entries, so I have become accustomed to that feature.But except for these few issues, I'm pleased with this calculator.
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