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Glass & Plastic Measuring Systems


Milliliter (ml): Milliliters are used to measure units of liquid volume. One milliliter is equal to one cubic centimeter or 1/1000 of a liter.

Dram (fl. dr.): Drams are used to measure units of liquid volume. One dram is equal to 1/8 of an ounce, or 3.697 milliliters.

Ounce (fl. oz.): Fluid ounces are used to measure units of liquid volume. One fluid ounce is equal to 1/8 of a cup, or 29.574 milliliters.

Drop: Actual drop sizes can vary significantly, depending on the thickness of the oil and the size of the dropper. For purposes of this chart we are using the pharmaceutical standard drop, or 0.05 mililiters. This is the approximate size of a drop of water.

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