Based on the provided contexts, Alucard's year of birth is 1431 [2] [3]. Therefore, his age can be calculated by subtracting 1431 from the current year. As of the context updated in 2023 [7], Alucard would be approximately 592 years old. However, it's important to note that as a vampire, Alucard does not age or die in the traditional sense [7].