1/2 cup of uncooked rice yields about one full cup. If there's other
food there, you can presume people will take about a scant 1/2 cup
maybe less. The rice to liquid ration for a pilaf is always 1 to 2.
One cup rice, two cups liquid. 2 cups rice, 4 cups liquid. Bigger
amounts than that I may reduce the water slightly. Obviously for a
softer rice you need more liquid.