Calcium ascorbate is a compound with the molecular formula CaC<sub>12</sub>H<sub>14</sub>O<sub>12</sub>. It is the calcium salt of ascorbic acid, one of the mineral ascorbates. It is approximately 10% calcium by mass.
As a food additive, it has the E number E 302. It is approved for use as a food in the EU, USA and Australia and New Zealand.