Sugar Syrup Calculator is available now in the Apiary Book for Android app.
Calculator 1 helps you to determine how many liters of water and kilograms of sugar you must add to get a specific volume of syrup.
Calculator 2 can be used in order to determine how many liters of sugar syrup you get for a specific quantity of sugar.
Important: the beekeeper must feed only to prevent starvation and not for the production of honey that is to be gathered later.