Heart Rate Zone Calculator
Find your training heart rate zones using the Karvonen method.
Max Heart Rate: 190 bpm
Zone 1 — Recovery128–140 bpm
Zone 2 — Fat Burn140–153 bpm
Zone 3 — Aerobic153–165 bpm
Zone 4 — Anaerobic165–178 bpm
Zone 5 — VO2 Max178–190 bpm
About Heart Rate Zone Calculator
This is a free, fast, and fully client-side heart rate zone calculator tool. All processing is done locally within your browser to ensure maximum privacy and security. No data is sent to our servers. Bookmark this page for quick access to ad-free, high-performance SEO and developer utilities.