The putting stroke in golf is a crucial component of the game, accounting for approximately 45% of the total strokes in a match. While professional players show 96% accuracy from 1 meter, performance drops dramatically to 65% from 2 meters. To maintain high accuracy, training is essential with precise trajectory feedback provided by specialized tools. Thus, the ability to maintain this level of precision lies in the accurate reconstruction of the putter's trajectory. Although different analysis systems exist, their main limitations are the impossibility of performing analysis in the open field and the high cost of equipment. In this context, inertial sensors (IMUs) which integrate an accelerometer and a gyroscope prove to be a feasible solution thanks to their relatively low cost and availability in real scenarios.