Key PointsQuestionHow does the competing risk of death from noncancer causes affect risk of death from oral cancer?FindingsThe models in the calculator using health data of 22 392 US adults with confirmed oral cancer estimates that patients with oral cancer have a higher risk of death from other causes than a matched US population, and that this risk increases by stage.MeaningThese results suggest that survival estimates that exclude the effects of coexisting conditions can lead to under- or overestimates of survival; this tool provides personalized data for discussions about the place of cancer treatment in the patient’s life as a whole.