A pound but not a kg - unless I think of it as ~2.2 pounds. A mile but not a km - unless I think of a km as ~0.6 miles. I can visualize an inch but not a centimeter - unless I think of a cm as ~0.4 inches. I use all sorts of units in calculations but, for thinking purposes, I prefer units that I can visualize. What you say? You measure volume in ounces too. precious metals are measured in troy ounces. Going back to your answer I would say that you need to look up the difference between avoirdupois and troy ounce. Come join the rest of the world using the communistic system developed by the French revolutionaries during the French revolution in 1799. You must be crazy to continue using measurements based on the body size of some ancient English king. can someone from the other side of the Atlantic explain how much a yard is when talking about mining, it drives me crazy to hear the people talking about yards when discussing how much material they run through the wash plant. If you have a million ounces of ore then a ppm is one ounce.Īnd on that note.
If you have a ton of ore then a ppm is a gram. ppm means parts per million.įor example 7 ppm of 3400 ounces. Whatever your sample weight is, divide it by a million and multiply it by the ppm value. The question was wrong at the start, like asking how many square foot there are per meter.
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