This research aims to determine the effect of STEM (Science, Technology, Engineering, and Mathematics) learning on students' mathematical numeracy abilities. The research method uses descriptive quantitative research by only looking at the values displayed based on descriptive statistics, involving 40 participants during 8 meetings and using 10 essay questions as an instrument for assessing mathematical numeracy abilities. The results of the analysis obtained a t value of 12.005 which also supports the significance of the findings, indicating a substantial impact of STEM learning on students' mathematics skills. The results above show that STEM learning at universities has an effect on students' mathematical numeracy abilities.