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Max Heart Rate
190
bpm (220 − age)
Heart Rate Reserve
125
bpm (MHR − RHR)
Warm Up 50–60%128–140 bpm
Light activity, warm up/cool down
Fat Burn 60–70%140–153 bpm
Best zone for fat loss
Cardio 70–80%153–165 bpm
Improves cardiovascular fitness
Intense 80–90%165–178 bpm
High performance training
Max 90–100%178–190 bpm
Short bursts only, elite athletes
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About this tool
Target Heart Rate Calculator — Calculate your exercise heart rate zones using the Karvonen formula. This tool runs entirely in your browser. No data is sent to any server. Free to use, no account required.