According on the fat source included in the diets for goats, the availability of nutrients can be improved. The objective was to evaluate the inclusion of calcium salts of fatty acids (CSFA) in diets of Saanen goats on the digestibility of dry matter and nutrients. Five Saanen goats (63.23 ± 9.08 kg body weight and ± 105 d of lactation) were distributed in a Latin square design (5 × 5). The treatments were diets: control (without CSFA) and the other with: 6.25, 12.50, 18.75, and 25.0 g of CSFA g/kg DM, respectively. The ingredients that were: ground corn, soybean meal, protected fat (calcium salt linked with long chain fatty acids containing 1,760 g/kg total digestible nutrients, 820 g/kg ether extract, 100 g/kg calcium, 260 g/kg oleic acid, and 420 g/kg linoleic acid), and mineral-vitamin supplement. The oat hay was utilized in a proportion of 570 g/kg DM for all the treatments. The rations were adjusted to provide 700 g of total digestible nutrients/kg DM and 155 g of crude protein/kg DM. The internal marker used to estimate the digestibility was the indigestible acid detergent fiber. After 15 d for the animals to adapt to the diets, samples of feces from the exit of the rectum were collected during 6 consecutive days to obtain a composite sample per animal for each period. Calcium salts of fatty acids showed a quadratic effect on digestibility of dry matter; organic matter; neutral detergent fiber and total carbohydrate with improvement from the minimum points of 13.2; 13.3; 16.9 and 14.6 g of CSFA/kg of dry matter, respectively. Crude protein digestibility and non-fiber carbohydrates digestibility were not influenced by treatments, however, for the ether extract digestibility there was a positive linear response as function of the calcium salts of fatty acids in diets. A quadratic effect was observed on total digestible nutrients with the minimum point of 9.8 g of CSFA/kg DM. In conclusion, the inclusion of 25.0 g calcium salts of fatty acids/kg DM in diets of Saanen goats shows a better response for the total digestible nutrients.