Its relatively proportional to the front and area of operations. In its heyday the deployment of IA was quite a bit but that varies based on threat level and “seasonality”.
The same applies on the Pakistani side as well but the WoT also took its strains.
Bilkul, Sir-ji.
Just to give you a flavour, Turtuk to Baltal (within the vale) is 688 kms, and is covered by one infantry division and one independent infantry brigade (about 20,000 soldiers). That is 30 soldiers - a platoon - per kilometre.
Within the Vale, we have the 390 kms from Baltal to Rajouri covered by two infantry divisions (30,000 soldiers). Around 77 soldiers, say 2.5 platoons per kilometre.
Those are the troops oriented to the LOC. For counter-insurgency, there are 50,000 Rashtriya Rifles soldiers for an area of 16,000 sq. kms. - 1 soldier for every 3 sq. kms. There are also around 150,000 constables - INCLUDING the Border Security Force - so, 1 constable per sq. km.
I am told that between 600,000 and 900,000 soldiers are positioned within the Vale. This is twice in the last 24 hours.
From Rajouri to Pathankot is 255 kms, covered rather better, with one RAPID, one infantry division at Akhnoor and Rajouri respectively, and one more infantry division echeloned behind at Yol. That's very roughly 45,000 soldiers. This is spread out, even in the jaws of a hungry opponent, about 5 platoons a kilometre.
The China side, after recent scares and shocks and alarums, is better, at 185 soldiers a kilometre; not strictly measurable in formation numbers, but would have been 6 platoons a kilometre.
Siachen is covered by one battalion from a brigade posted very far away, in a suburb of Meerut.
Perhaps in future my mental balance will remain in better shape if I allow our strategic geniuses - there is one who suggests howitzers pop up and down and destroy Indian bank branches - free play.