For three cups of rice and above, use a ratio of 1 cup of water or broth to every cup of rice, plus a quarter a cup to account for evaporation when the air fryer is coming to pressure. So you basically need 11/4 cups of water for one cup of rice, 21/4 cups of water for 2 cups of rice, and so forth). Use a 1:1 ratio if you like your rice to have more of a bite (al dente). Please also note that the water should always cover the rice, to prevent burning.