During the pandemic, students are at home and learning from home online. Learning through online methods requires teachers and students to adapt and motivate themselves to live it. This study aimed to determine the determinants of learning motivation factors on high school students' achievement in the era of the Covid-19 pandemic in Indonesia. The research method was quantitative research conducted on 60 students of class XI SMA class 2 of high school in three private high schools in Surabaya, Indonesia. By selecting purposive sampling based on the researcher's inclusion criteria and the data collection using google form. Then the collected data were processed using statistical methods using the correlation approach (correlational research) and linear regression. This study was to test the hypothesis related to the correlation between learning motivation variables and learning achievement during online learning in the Covid-19 pandemic era. Based on the correlation analysis of motivation on learning achievement, the correlation coefficient (r) = 0.458 with a significant value of 0.000 <0.05. Because with a significance value of 0.000 <0.05, Ho was rejected, and H1 was accepted. There was a very significant relationship between the two variables between learning motivation and learning achievement. Meanwhile, from the coefficient value of 0.458 (in the range 0.41 -0.6), it could be concluded that the correlation between learning motivation scores and learning achievement was moderate. In other words, the higher the motivation to learn, the higher the learning achievement of students. Then according to the t-test, it could be seen that the significance value of 0.000 was smaller than 0.05; it could be concluded that Ho was rejected and H1 was accepted, which meant that there was a significant influence between learning motivation and students achievement.