The document summarizes a presentation about calculating rate constants from rare molecular events using discretised relaxation path sampling (DRPS). DRPS allows calculating rate constants for processes that span a large range of timescales, from molecular vibrations occurring in femtoseconds to protein folding taking milliseconds. Examples discussed include the rate of particle diffusion in Sinai billiards, polymer reversal and translocation, peptide dynamics, and biomolecular folding. DRPS estimates rate constants based on calculating the probability of relaxation from a transition state to equilibrium populations.