INTRODUCTION:: To create and implement a venous thromboembolism (VTE) calculator for post-cesarean section patients at a community hospital, and analyze its association with subsequent rates of pharmacologic thromboprophylaxis use. METHODS:: A risk calculator was developed, with points weighted based on the severity of the risk factor. Use of a paper form of the calculator was initiated in May 2015 (phase 1), and of an electronic form in August 2016 (phase 2). Data from 50 subjects each prior to the intervention (phase 0), during phase 1, and during phase 2 were collected (total n=150). Rates of pharmacologic thromboprophylaxis were compared with risk categories using Fisher exact test. Logistic regression models of these associations adjusting for key covariates (age, body mass index greater than 40, chorioamnionitis) were also constructed. RESULTS:: There was a statistically significant increase in the use of pharmacologic prophylaxis after the intervention (phase 1 and 2), when compared to phase 0 (p=0.02). There was also a statistically significant decrease in high risk patients not receiving prophylaxis (p <0.0001). The association between phase and use of prophylaxis remained statistically significant after adjustment for covariates. CONCLUSION:: Use of our calculator has led to a significant increase in prescription of pharmacologic thromboprophylaxis, particularly in moderate and high risk patients. To our knowledge, there have been no thromboembolic events since the start of the intervention.