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Lawrence Gohleft a comment
Hey👋 I built this because most Zone 2 calculators felt too simplistic or inconsistent. This one shows 3 methods side-by-side so you can compare and choose what works best for you. Curious — how are you currently tracking your Zone 2 training? Would love your feedback 🙏
Zone 2 Heart Rate CalculatorFind your Zone 2 range using MAF, Karvonen & % Max HR
Lawrence Gohleft a comment
Hey Product Hunt! 👋 I built this because I kept running into the same frustration — every Zone 2 calculator online picks one formula and gives you a single number, with zero explanation of why different methods produce different results. MAF, Karvonen, and percentage of Max HR all give different Zone 2 ranges — and they're all "correct" depending on your situation. So I built a tool that runs...
Zone 2 Heart Rate CalculatorFind your Zone 2 range using MAF, Karvonen & % Max HR
Most Zone 2 calculators use one formula. This runs all three — MAF, Karvonen, and % of Max HR — simultaneously so you see the full picture. Enter your age, resting heart rate, and fitness level. Get your Zone 2 range three ways, a complete 5-zone training table, weekly volume recommendations, and plain-English explanations. Free. No signup. No email. Built for runners, cyclists, and anyone serious about aerobic base training and longevity.
Zone 2 Heart Rate CalculatorFind your Zone 2 range using MAF, Karvonen & % Max HR