[header] How to work out heart rate zones [title] Calculate your maximum heartbeats per minute by subtracting your current age in years from 220 if you are a man, and from 226 if you are a woman. [substeps] For example, if you are a 30-year old man, subtract 30 from 220. Your maximum heartbeats per minute is 190. 
You can also visit a doctor or health-care provider to have them calculate your maximum heart rate using different tests. Methods of testing may include a stress test or exercise tolerance test on a treadmill.