Jameel Kadhum Abed, Bassam Mohammed Yaseen, Mohannad Jabbar Mnati, The Effect of Using Filter on Total Harmonic Distortion in Multilevel Inverter, Journal of Engineering and Applied Sciences, Volume 14,Issue 1, 2019, Pages 13-20, ISSN 1816-949x, jeasci.2019.13.20, (https://makhillpublications.co/view-article.php?doi=jeasci.2019.13.20) Abstract: Multi-level inverter used in applications that require high power. The important factor in multi-level inverter is Total Harmonic Distortion (THD). This study discuss nine level cascaded H-bridge multilevel inverter. Also, proposed the effects of using filter on waveform and Total Harmonic Distortion (THD) of output voltage and current. Discussed LC low pass filter and sinusoidal pulse width modulation as control technique of switches. Comparison THD of nine level cascaded H-bridge multilevel inverter with and without filter. The proposed level and filter are design and simulate by MATLAB 2010 Version 7.11.0. The simulation results show the effects of using filter on THD and waveform of output voltage and current. Different methods for choosing filter value are used to illustrate the filter effect. Keywords: output voltage;design;Low Pass Filter (LPF);Sinusoidal Pulse Width Modulation (SPWM);Cascaded H-Bridge Multilevel Inverter (CHBMLI);current