J.S. Grewal's standard modern history of the Sikhs, and other accessible surveys of the conflict, record casualty figures for individual battles and massacres, tens of thousands at the Battle of Bhilowal, thousands at Chhota Ghallughara, hundreds at the siege of Gurdaspur, but none totals them into a single figure for the roughly ninety year conflict, and no comprehensive scholarly count was located. A figure is never invented to fill that gap.
What would resolve this A scholarly synthesis totaling documented losses across the conflict's 1621 to 1715 span, or a demographic study of Punjab's population comparable to the census based methods used for other early modern wars. No such synthesis was located across the standard modern histories of the conflict.
OpenMilitary and demographic history of Mughal India and early Sikh Punjab.J. S. Grewal, J.S. Grewal, The Sikhs of the Punjab (New Cambridge History of India II.3)