Heart & circulation tools

Free, private tools to make sense of your heart numbers — check a blood-pressure reading against clinical categories, work out your cholesterol ratio, and find your heart-rate training zones.

Free · no account needed · private by design

Blood Pressure Checker

Find your blood-pressure category from a reading (AHA guidelines).

Cholesterol Ratio Calculator

Your total-to-HDL ratio, non-HDL and LDL cholesterol, with reference ranges.

Heart Rate Zone Calculator

Your five training zones from your age (and resting heart rate).

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