Objective: To describe the characteristics of wounds, ischemia, and foot infections classification system (WIfI) in patients with diabetic foot and analyze risk factors relating to the WIfI classification in these patients. Creation of an early version of a risk calculator for diabetic foot patients in Vietnam. Methodology: A cross-sectional descriptive study, 60 patients with diabetic foot disease at Hue Central Hospital from December 19, 2021 to April 29, 2022. Results: Prevalence of amputation risk WIfI classification is 26.7 in stage 1 (very low), 30% in stage 2 (low), 23.3% in stage 3 (medium) and 20% in stage 4 (high). The related factors of the WIfI classification stages were HbA1C (p=0.035), ankle brachial index (ABI) (p=0.05), toe brachial index (TBI) (p=0.01), toe pressure (TP) (p=0.01). The regression model is described by the equation: Risk of amputation = 3.701 - 0.788ABI - 1.260TP. An online calculation tool has been installed at banchandaithaoduong.vn, which can be used initially for reference. Conclusion: It is necessary to apply the WIfI classification for the assessment of patients with diabetic foot in Vietnam, paying special attention to the TP and ABI index. The online assessment tool banchandaithaoduong.vn has the potential to develop and be widely used in the future.