About

A free tool built on real science

NormalHeartRate.org provides a free, science-based analyzer for resting heart rate and breathing rate. Unlike generic "is my heart rate normal" searches that return vague 60–100 bpm ranges, this tool gives you age- and sex-adjusted population means from peer-reviewed research — and tells you exactly where you stand relative to 92,000+ real people.

92,457
Study participants behind the reference data
12
Clinical analyses per result
6
Peer-reviewed sources cited

Why We Built This

Most online heart rate tools show you a single number: "normal is 60–100 bpm." But that range ignores two critical variables — age and sex. A 25-year-old woman has a meaningfully different expected heart rate than a 60-year-old man, and treating them the same misses the clinical picture entirely.

We built NormalHeartRate.org to answer the question most people actually have: "Is MY heart rate normal — for someone like me?" The answer depends on your demographic, and we use the best available population data to give it to you.

The Science Behind It

The primary reference dataset is the Health eHeart Study (Shcherbina et al., 2019, npj Digital Medicine), which analyzed continuous wearable heart rate data from 92,457 adults. This is one of the largest real-world resting heart rate datasets ever published, and it eliminated the "white coat effect" common in clinical measurements.

Additional references include the UK Biobank study (n=502,534), CDC/NHANES population surveys, AHA clinical guidelines, and Cleveland Clinic respiratory rate standards.

What the Tool Analyzes

01Heart Rate Zone — compared to your age/sex-adjusted population mean
02Breathing Rate Zone — clinical range 12–18 breaths/min (Cleveland Clinic)
03HR:RR Cardiac-Respiratory Coupling — autonomic nervous system balance
04Minute Ventilation — total air moved per minute (L/min)
05Alveolar Ventilation — effective gas exchange volume
06Estimated Cardiac Output — blood pumped per minute (HR × stroke volume)
07Clinical Pattern Recognition — identifies 8 cardiopulmonary patterns
08Autonomic Balance Score — sympathetic vs. parasympathetic tone (0–10)
09Cardiopulmonary Efficiency — O2 delivery per litre of ventilation
10Daily Heartbeats — estimated total beats today
11Daily Breaths — estimated total breaths today
12Air Volume Today — total litres of air inhaled

Transparency & Limitations

We believe honest tools are better tools. Here is exactly what NormalHeartRate.org is — and is not:

✓Independent project — not affiliated with any hospital, medical institution, or healthcare organization.
✓Reference data is peer-reviewed — all population norms come from published studies (see references below). We do not manufacture data.
✓The Vitals Reference Index is a composite indicator — not a validated clinical score. It combines 4 weighted analyses to give a relative sense of where your vitals fall. It is not equivalent to any medical assessment.
✓Content is not reviewed by a medical professional — all articles and tool descriptions are based on published research but have not been independently verified by a physician or clinician.
✓This tool does not replace clinical evaluation — resting heart rate measured at home differs from a clinical setting. If you have symptoms or concerns, see a qualified healthcare provider.

Medical Disclaimer: NormalHeartRate.org is an informational reference tool only. It does not constitute medical advice, diagnosis, or treatment. All reference ranges are based on published peer-reviewed population data. The Vitals Reference Index is an indicative composite score, not a clinical measurement. If you are concerned about your heart rate, breathing, or cardiovascular health, consult a qualified healthcare provider.

Privacy

All calculations run in your browser. No health data you enter is ever sent to our servers or stored. We use Google Analytics for anonymous site traffic analysis only. See our Privacy Policy for full details.

Try the Analyzer

Enter your age, sex, heart rate, and breathing rate for a full 12-analysis clinical report — free, instant, and private.

Analyze My Vitals →
Scientific References
01Shcherbina A et al. — Real-world heart rate norms in the Health eHeart Study. npj Digital Medicine 2(1):58 (2019). n=92,457.
02Aune D et al. — Resting heart rate and cardiovascular mortality. PLOS One 15(5) (2020). n=502,534.
03American Heart Association — Target Heart Rates. Normal resting HR: 60–100 bpm.
04Cleveland Clinic — Vital Signs. Normal respiratory rate: 12–18 breaths/min.
05CDC/NCHS — NHANES 1999–2008 — Population resting pulse rate reference data.
06King J, Lowery DR — Physiology, Cardiac Output. StatPearls, NLM (2023).