Understanding Your Heart Rate Calculator
This heart rate calculator uses the Karvonen formula to translate your age, resting pulse, and workout intensity into a precise target pace. Knowing this helps you stay in the right aerobic zone, measure exertion accurately, and avoid overtraining.
Begin by entering your current age (years), your resting heart rate measured while relaxed, and the intensity percentage you want to aim for during your session. The calculator trims the math by deriving your maximum heart rate (220 minus your age) and interpolates between resting and maximum beats to deliver the exact beats per minute you should hit.
Example: A 35-year-old with a resting heart rate of 62 bpm shooting for 70% intensity should train around 147 bpm. The calculator will also show the typical aerobic zone from 50% to 85% to keep your work rate balanced.