Calculate your maximum heart rate using multiple validated formulas, evaluate your resting heart rate against age-based norms, and determine your heart rate recovery fitness level. All in one comprehensive cardiovascular health tool.
Heart rate provides a window into cardiovascular health. Three key metrics — resting heart rate, maximum heart rate, and heart rate recovery — each reveal different aspects of fitness and heart health.
Resting Heart Rate (RHR)
RHR reflects the heart's efficiency at rest. Lower RHR = more efficient heart that pumps more blood per beat. Measure first thing in the morning before getting out of bed, after at least 5 minutes of lying still. Average RHR: 60–80 bpm. Elite athletes: 40–60 bpm.
Heart Rate Reserve (HRR)
HRR = Max HR − Resting HR. A larger reserve indicates greater cardiovascular fitness capacity. The Karvonen formula uses HRR to calculate personalized training zones — see the Target Heart Rate Calculator.
When to See a Doctor
Consult a physician if your resting HR is consistently above 100 bpm, consistently below 40 bpm without being an athlete, or if you experience irregular heartbeat, palpitations, or dizziness with exertion.
The most widely used formula is 220 minus age. A 40-year-old has an estimated max HR of 180 bpm. This is a population average and individual max HR can vary by ±10–12 bpm. The Tanaka formula (208 − 0.7 × age) is slightly more accurate for adults over 40. Actual max HR can only be determined through a graded exercise test.
Exercising above 90–95% of your maximum heart rate for extended periods can be risky, particularly if you are not highly conditioned. Most exercise guidelines recommend staying at 50–85% of max HR depending on fitness goals. If you experience chest pain, dizziness, or shortness of breath at any heart rate during exercise, stop immediately and consult a doctor.
The manual method: immediately after stopping exercise, place two fingers on your neck or wrist, count beats for 15 seconds, multiply by 4. For a less precise in-exercise check, use the talk test — if you cannot speak in full sentences, you are above ~80% max HR. A chest strap is the most accurate wearable; optical wrist sensors are convenient but less accurate during high-intensity activity.
A 35-year-old male with a resting HR of 62 bpm. Standard max HR = 220 − 35 = 185 bpm. Heart rate reserve (HRR) = 185 − 62 = 123 bpm. His resting HR of 62 falls in the "Above Average" category for men. If he measures his HR 1 minute after a maximal effort at 155 bpm, his heart rate drop = 185 − 155 = 30 bpm, which is an excellent recovery score indicating strong cardiovascular fitness. Zone 2 training (60–70% HRR) = 136–148 bpm for him.
Common causes of elevated resting HR include dehydration, caffeine, stress and anxiety, poor sleep, fever or infection, anemia, thyroid dysfunction, and certain medications. A consistently elevated RHR above 80–90 bpm warrants a medical evaluation to rule out cardiac or metabolic causes. Tracking RHR over time with a wearable device is more informative than a single measurement, as daily variation of 5–10 bpm is normal.