Weight vs. Volume Measurement for Ingredients
Question
I have a product labeled 50g, but its volume appears to be less than 50ml. Why is this the case? Also, if my formulation requires 20g of an ingredient, how can I calculate the equivalent amount in ml?
Answer
Regarding your questions about the product labeled 50g containing less than 50ml and how to measure 20g in ml:
Why is the volume less than 50ml?
Grams (g) measure weight, while milliliters (ml) measure volume. These are not the same unless the substance has a density of exactly 1 gram per milliliter. Only pure water at a specific temperature has a density close to 1 g/ml. Most other substances, including ingredients like the one you have, have different densities. If a substance has a density greater than 1 g/ml, 50g will occupy less than 50ml. If it has a density less than 1 g/ml, 50g will occupy more than 50ml. The amount you received is measured by weight (50g), and its volume happens to be around 45ml, which is normal if its density is slightly greater than 1 g/ml.How to measure 20g in ml?
To convert a weight (grams) to a volume (milliliters), you need to know the density of the specific substance. The formula is Volume = Weight / Density. Without knowing the density of your "Matrixyl Pep-coll" product, you cannot accurately convert 20g to ml. The most accurate way to measure 20g for your formulation is to use a scale that can measure in grams. If your formula specifies grams, you should always measure by weight using a scale.