The density of aqueous solutions containing actinide nitrates is an important parameter for process design, equipment design, and remote operation/control. It is also significantly important for the estimation of atom densities during criticality calculations and related experiments involving actinide solutions. Using a massive database of 1353 points consisting of in-house-generated data as well as data published in the literature, a robust estimation of the coefficients of a re-parameterized and dimensionally consistent form of density equation was performed in the following range of parameters: U(VI) concentration 0 to 1330 g/L, Pu(IV) concentration 0 to 1201 g/L, HNO3 concentration 0 to 15.8 M, and temperature range of 283.15 to 373.15 K. This paper lists the details of the new database, the newly estimated coefficients, and the performance evaluation of the proposed re-parameterized dimensionally consistent equations.