Zone 2 Heart Rate
Calculator
Zone 2 is the aerobic base-building zone — hard enough to drive adaptation, easy enough to sustain for 30–90 minutes. Enter your age to find your exact range.
Free, no sign-up. Your numbers in, a clear target out.
Calculator
Find Your Zone 2 Range
Find it in your Oura, WHOOP, or Apple Health app — it shows up in your sleep or recovery summary. Skip if you don't have a wearable.
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