I must have misread the description so I take the blame. All I needed was millimeter accuracy for gems, I don't need inches or conversion. If you just want to read MM, this isn't for you. Once the gem was measured I had to click on the mm/inch reading and as I said I don't need the inch reading I can use a ruler. For example, the mm reading on the stone, which I knew was 10mm, would give me 9.98 or something. I added other gems thinking this would give me the correct measurement in millimeters right away. My fault but not measuring gems at all helps me. From what I understand this could mean 9.5mm, which would be unusual. It should say 10 so I will continue to use my little caliper which is accurate and old as the world but I need accuracy. Why would anyone want to make a transformation.
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