Van Der Waals Equation Calculator Van Der Waals Equation:\((P+\frac{a\cdot n^{2}}{v^{2}})(V-n\cdot b)=n\cdot R\cdot T\) Where Gas constant (R) = 8.3144621Temperature (T):KNumber of moles (n):Volume (V):m3 Measure of the attraction between the particles (a):J*m3/mol2 Volume excluded by a mole of particles (b):m3/mol Pressure of the gas (P):pascal