❤️ Maximum Heart Rate Calculator ❤️

The Maximum Heart Rate Calculator is an essential tool for endurance athletes, fitness coaches, and anyone who wants to train smarter. Your maximum heart rate (HRmax) is the highest number of beats per minute your heart can achieve during all‑out effort. Knowing your HRmax allows you to define accurate training zones: aerobic endurance, anaerobic threshold, and VO2max intervals. This tool offers four science‑based formulas: the classic Fox (220 – age), the more accurate Tanaka (207 – 0.7·age), Åstrand (216.6 – 0.84·age), and Gulati (206 – 0.88·age) which was developed specifically for women. Simply enter your age, select a formula, and you’ll get an instant HRmax plus five heart rate zones (50‑60% recovery, 60‑70% aerobic base, 70‑80% tempo, 80‑90% threshold, 90‑100% VO2max/anaerobic). Each zone helps you target specific energy systems: the aerobic zone improves fat metabolism, the threshold zone boosts lactate clearance, and the red zone increases stroke volume. The calculator is responsive and works perfectly on mobile, tablet, or desktop. All values are estimates — for a truly precise HRmax, consider a maximal exercise test with a physician. Nevertheless, these formulas provide an excellent starting point for setting your heart rate monitor and structuring interval workouts. Use this tool in combination with perceived exertion to fine‑tune your training. No login, no ads, completely free. Whether you are a runner, cyclist, rower, or swimmer, understanding your heart rate zones takes the guesswork out of intensity. We continuously update our methods based on sports medicine guidelines. Remember to warm up properly before high‑intensity sessions and consult a professional if you have any medical conditions. Now, find your maximum heart rate and train with precision!

The math behind the scenes: after selecting a formula, we calculate HRmax, then derive zones as percentages. The reset button brings back age 35 and the Tanaka formula as a starting point. You’ll see the zones updated instantly. The tool is built with pure JavaScript and CSS, no external libraries — fast and private. Bookmark it for quick access during your weekly planning. We’re confident this will become your go‑to heart rate reference.