my baby birth weight 3.1 ,now she is 2 month baby, How much should it weigh now?

A. A minimum of 4.1 maximum can be 5.1 C I’m just telling you this because you need to know and understand what is the way to calculate the weight gain it should be minimum gain 500 g which is very very important to be seen and it can lead to 1 kg kilogram maximum in a month so accordingly I am guiding you on both the ways possible