Population density at census tract level

I am looking for the population density (e.g. persons per square mile) over all US census tracts. Would anyone be able to point me to a link to find this? I have spent many hours looking through the ACS and Census sites and am unable to find this data.

I alternatively would be able to compute population density by getting population count and area for all census tracts but am finding it hard to get the latter at the census tract level. Thanks!