Analgorithm for estimating the kinetic energy in the Nordic power system has beenpresented and compared to the TSOs’ estimation based on breaker status. Theaverage error between the TSOs’ estimate and the proposed estimate is 0.83%.Furthermore, the standard deviation between the two estimates is 13 GWs, about7% of the system average kinetic energy. The proposed estimate manages tocapture the diurnal variation of the system kinetic energy with a correlationcoefficient of 0.94. The total system kinetic energy in 2015 is estimatedconsidering a possible contribution of kinetic energy from wind turbines duringa large power imbalance. Lastly, the Nordic kinetic inertia is estimated for2025, with and without possible contributions from wind, further increasing thereleased kinetic energy during a n-1 contingency with 22%.