The regional bio-wastes available in abundance in India werw converted into porus carbon by heay treatment at different temperatures from 650-950℃. The wood retain shapes after pyrol-ysis through shrinkage occured both in axial and radial directions. The shrinkage in radial direction was found to be more than in axial direction in all woods. The density of woods and chars from these at a given temperature has been found to follow linear relationship.