Capital Gain

net sale consideration - indexed cost of acquisition - indexed cost of improvement = LTCG

add: net sale consoderation
less: cost of improvement if done after 1/4/01
less: indexed cost
{Note Cost Will Index As Per Income Tax Act And Manjulabhen v/s CIT Case.
As Per IT* If Year Of Transfer Is Before 1/4/01 than your base year will be 2001 whose index is 100, if you are selling the asset in AY 18-19 simply multiply by 272.(Revised Base Year)}

cost of improvement is also eligible for indexation

for manjula bhen case refer some modules.