Hi @AnkitJasani29 , 2: value is being calculated correctly at line 5, so it is definitely not undefined nor NaN 3: I tried in calculation, layout: ready, form: ready, neither of them are functioning properly anytime I use layout.h value Thanks 

Thanks for reply,I tried to put parseFloat(xfa.layout.h(parent.parent.parent, "in"));but it didn't help (value is calculated but height is not being adjusted )  However if I put parseFloat( "2.3" ); like in line 4height is being adjusted correctly: 

I have table within another table and I need to adjust Table Row Height relatively to the row height of main table.According to documentation I've got a row height of the main table using: var mainRowHeight = xfa.layout.h(parent.parent.parent, "in"); after that I made some calculations with this val...