Abstract: In the present experiment, the effect of consumption of either Broken Rice (BR) or Cassava Chips (CC) on calcium and phosphorus balance was studied in growing Kadon pigs. Sixteen male pigs with initial body weight of 10.4 + 1.8 kg were used in a completely randomized design. The experimental diets contained similar concentrations of calcium and phosphorus, but the intakes were somewhat higher in pigs fed the CC diet. Apparent calcium and phosphorus absorption, when expressed as a percentage of intake, was significantly lower in the pigs fed the CC diet. In the pigs fed the CC diet instead of the BR diet, fecal calcium and phosphorus excretion were significantly increased. These data indicate that when formulating pig diets containing either BR or CC as carbohydrate source the levels of calcium and phosphorus may be adjusted to take into account the different efficiencies of absorption.