To make lemon balm tea, add a handful of lemon balm leaves to 1 cup of water and steep for at least five minutes. For a soothing lemon balm bath, put some fresh (or dried) crushed lemon balm leaves into a muslin bag, then let the warm water run through it as you fill the tub.
If you have pure water then a ml is equal to a mg. Water is the only substance where this is true, because water was used as a common substance when devising the metric system, based on the earth. . Absoultely not! ml is milliliter, a measure of volume and mg is milligram a measure of weight. No. ml is milliliters 1ml=0.001l (1/1000 liters). This measures volume of a liquid. mg is milligrams 1mg=0.001g (1/1000 gram).
How many mg equals 40 ml? Does not convert; milligrams (mg) and grams (g) are measures of  weight or mass and mL (milliliters) is a measure of  volume.his cannot be sensibly answered. A milliliter (mL or ml) is a  measure of volume, grams (g), kilograms (kg) and milligrams (mg)  are measures of weight or mass. 1 person found this useful.