When cooking rice at home, a pot with a tight lid is ideal as it will reduce the amount of evaporation.
It’s also important to know the humidity in your environment, lid tightness, and the diameter of the pot you’ll be using.
These factors all affect the outcome of your rice, so getting to know how they influence evaporation will help you create the perfect ratio for the specific conditions of your kitchen.
http://www.dailymail.co.uk/sciencetech/article-3564374/Why-t-cook-rice-Scientists-reveal-perfect-formula-fluffy-results-say-common-recipes-wrong.html
So. Doing it right, anybody?