Millings compact to about 120 lb/ft³, so one cubic yard weighs roughly 1.62 tons.
Recycled millings compact looser than virgin hot mix, around 120 lb/ft³, so a cubic yard weighs about 1.62 tons instead of 1.96. This view preloads the millings density; you still want a compactor to lock them in.
Why order extra? The headline number is the exact material your project needs. When you actually order, add about 5–10% on top — the “with 5% waste” figure in the result is a safe starting point. That margin covers what you lose to compaction, cuts around edges and corners, and ordinary spillage during handling. It is cheaper to have a little left over than to stop mid-job and wait on a second delivery.