Everybody wants to be young at heart, but too many Americans have hearts that are older than their actual age.

The Centers for Disease Control and Prevention has a new online Heart Age Predictor tool that calculates your risk of cardiovascular disease over the next 10 years. You input a few vital statistics, including your age, systolic blood pressure (that's the first, higher number on your readings) and your body mass index (BMI). If you don't know your BMI, the site has a link where you can calculate it. The CDC says the majority of U.S. adults don't score well on the test and have a heart age higher than their actual age, which increases their risks of heart attack and stroke.

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To access the Heart Age Predictor tool, go to nwsdy.li/heartcalc.

For more on heart age and what you can do to improve your health, go to nwsdy.li/heartage.