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ProCarpenter Square One Tape Measure

ProCarpenter Square One Tape Measure

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The Square One Tape Measure was designed to quickly help you find the hypotenuse (square) of anything. It has a dual scale; one side is a standard scale, the other side is an exaggerated hypotenuse scale. Zero math, zero mistakes.

To see all our Tape Measures, press here.

Square One Tape Measure Intro
Inventor Intro
ProCarpenter Tape Measures Series

There is an oily substance coming from my tape measure. Is it harmful and how do I clean it?

The substance coming from your tape measure is a plasticizer, and it is not harmful. This might happen over time, but we are more than happy to replace your tape measure. Email us at with your address, phone number, and which ProCarpenter tape measure you have or you call us at 888-443-3748 and we will get a new tape measure out to you.

I have a Flatback 16' Pro Carpenter tape measure that is about a month old. The main lock will not hold the blade in place, while the one on the bottom works fine. I bought two of these tapes from a distributor and the other one works fine. I was wondering, is there a warranty. 

Our products are guaranteed to be free of defects. If you have a defective product first call the distributor that you bought the tape measure from and they will replace it for you, or call us at 1-888-443-3748.

Do any of your tape measure have 1/32" increments?

Sorry, no.

What is your smallest tape measure?

Mini Standard Reverse 6'.  It has a 6' blade that is 5/8" wide. It measures 2" high.

What is the standoff of the Mini Standard Reverse 6'?


Does the Old Standby Tape Measure have a standard 16" on center layout indicated on the tape?

Yes, the 16", 32", etc. are red on the tape.