1,000,000 grams of long-grain rice is a significant amount that weighs 1.1 US tons (1 tonnes). If you poured this amount into a loose pile, it would be 7.78 ft (2.37 m) wide and 31.5 in (80 cm) tall, which is about 2 cubic yards.

Volume
1.54 cubic yards
1.54 yd³ (1.18 m³)
about the size of a pickup truck bed, heaped
Long-grain rice typically ranges 0.75–0.92 g/mL depending on how it's packed. A firmly packed scoop weighs more.