Depending on the specific conversion you’re doing, they will not be comparable because of this.

You will need to know some other information as there is not a simple formula. You’ll also need to know the concentration or weight of the object. All products, specifically over the counter and prescription drugs are required to list the concentration. This will be listed as something along the lines of 25 mg per teaspoon.

1 teaspoon = 5 ml

You’ll then be able to make the conversion.

If you need 50 mg, then you will need 2 teaspoons or 10 ml.

To simply convert the milligrams to milliliters, you need the concentration, otherwise you won’t have everything you need. It requires 2 numbers, not just 1.

Many people will argue that it is simply a movement of decimals or a formula such as 12 inches equals 1 foot, but it’s not. This confusion comes as a result of many people simply not understanding the metric system. The metric system does require decimals to be moved, but only within the same unit of measurement. If you go from milligrams to kilograms, then you’ll be using the same measurement.

However, you are going from a weight to a liquid, so it will require an additional form of measurement. The same is true for the US system of weights and measures. You can’t convert liquid ounces to weight ounces unless you know the weight of the object. Flour, eggs, and milk all have different weights, so it’s important to know what you’re dealing with in order to make an accurate conversion.