after 1 year weight gain slows down and they gain only 1-2 max per year 

by 6 months baby double their birth weight and by 1 year they triple their birth weight. apart from this if the child is steadily gaining weight and is peeing 5-6 times in a day. baby is doing vry gud

weight is perfectly fine.. my baby of 4 months just has 3.81 kgs.. so, you baby is doing too well..

This article will help you give some idea. Take a read. https://www.babychakra.com/learn/1100-the-ultimate-height-and-weight-tracker-for-little-girls