About the exact number of weight in the human model

I notice the weight is shown as a percentage number. How I can know the exact weight of this human model? Can I input a exact weight such as 60kg into the model?
modelling of 3-Dimensional characters
http://www.makehumancommunity.org/forum/
http://www.makehumancommunity.org/forum/viewtopic.php?f=7&t=2633