Vector Size(K): 1 2 3 4 5 6 7 8 9 10 Input Vector (z) Output Vector Calculations Softmax is calculated with the following formula. $$\sigma(\mathbf{z})_j = \frac{e^{z_j}}{\sum_{k=1}^K e^{z_k}}$$ Enter a vector of values above, and you will see the calculations to compute softmax.