How it works: Start with your real age, then apply the questionnaire adjustments shown next to each answer: exercise −3 to +4, sleep −2 to +3, smoking −1 to +6, diet −2 to +3, stress −1 to +3. The total is your lifestyle adjustment. This is an entertainment-style estimator based on well-known lifestyle risk directions — it is not a medical assessment and no questionnaire can measure your actual biological age.