Are you among the very young at heart? You can find out, as the city Health Department has launched an online calculator to measure your "heart age."

The calculator uses information like age, height, weight, blood pressure, and whether you smoke or have diabetes to determine your heart age. It then tells you your risk for stroke or heart disease. 

The tool also provides users with ways to improve their health - including tips for healthy eating and active living and resources to help people quit smoking.