Pulse TrackerHeart calculators that run in your browser
Zones, max heart rate, blood pressure categories, MAP, HRV, a tap counter and a breathing pacer. Nothing you enter leaves your device. No sign-up.
Heart rate zone calculator
Free heart rate zone calculator. Enter your age (and resting heart rate for the Karvonen method) to get your max heart rate and all five training zones in BPM.
Open tool →Max heart rate calculator
Free max heart rate calculator. Enter your age to compare four published formulas: 220 − age, Tanaka, Gulati for women and Nes, and see your target heart rate ranges.
Open tool →Blood pressure calculator
Free blood pressure calculator. Enter systolic and diastolic to get the American Heart Association category, pulse pressure and mean arterial pressure, with what each result means.
Open tool →MAP calculator
Free mean arterial pressure calculator. Enter systolic and diastolic to get MAP and pulse pressure instantly, with the normal ranges and the formula explained.
Open tool →HRV calculator
Free HRV calculator. Paste R-R intervals in ms to get RMSSD, SDNN and pNN50, or enter your RMSSD and age to see where it falls against typical ranges.
Open tool →Tap BPM counter
Free online heart rate counter. Find your pulse at the wrist, tap the button with each beat, and see your BPM live. Or use the 15-second count mode. No camera, no sign-up.
Open tool →Breathing pacer
Free online breathing pacer. Follow the expanding circle for resonance breathing at 5.5 breaths per minute, box breathing or 4-7-8, with a session timer. No sign-up.
Open tool →Guides behind the tools
Normal resting heart rate by age
Charts for adults, athletes, children and seniors, plus what a high or low reading means.
Read guide →Blood pressure chart explained
Normal, elevated, stage 1, stage 2 and crisis ranges, and how to measure properly at home.
Read guide →What is HRV and what is a good number?
Heart rate variability by age, why it changes, and how to improve it.
Read guide →How to measure heart rate on iPhone
Three ways to check your pulse with an iPhone, with and without an Apple Watch.
Read guide →Is a Resting Heart Rate of 100 Normal?
A resting heart rate of 100 BPM sits right at the top of the normal 60 to 100 range. Above it is tachycardia. What to check first and when to see a doctor.
Read guide →Is a Resting Heart Rate of 55 Good?
A resting heart rate of 55 BPM is below the textbook 60 to 100 range but is usually normal and a sign of good fitness. When 55 is fine and when it is not.
Read guide →Start tracking your heart today
Free to download on the App Store. Measure your first heart rate in under a minute, no wearable needed.
Download for iPhoneRequires iOS 17 or later · ★ 4.7 rating · Available in 8 languages