Sedentary (Little to no exercise)
Moderately Active (3-4 days/week)
Highly Trained / Athlete
Male
Female
Analysis Result
Heart Rate Status:—
Ideal Range for You:—
Estimated Max Heart Rate:—
What is a Normal Resting Heart Rate?
A resting heart rate (RHR) is the number of times your heart beats per minute (BPM) while you are at rest. For most adults, a normal resting heart rate ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a highly trained athlete might have a resting heart rate closer to 40 beats per minute.
Factors Influencing Your Resting Heart Rate
Age: RHR can change as you get older, though it doesn't fluctuate as much as maximum heart rate.
Fitness Level: Regular cardiovascular exercise strengthens the heart muscle, allowing it to pump more blood with each beat.
Temperature: Heart rates may increase slightly in high temperatures and humidity.
Emotions: Stress, anxiety, and even extreme happiness can raise your RHR.
Medication: Beta-blockers can slow the heart rate, while some thyroid medications may increase it.
How to Measure Your RHR Correctly
To get the most accurate reading, check your resting heart rate first thing in the morning, before you get out of bed or consume caffeine. Place your index and middle fingers on your wrist (radial pulse) or the side of your neck (carotid pulse). Count the beats for 30 seconds and multiply by two, or count for a full minute for maximum precision.
Target Heart Rate Zones vs. Resting Heart Rate
While Resting Heart Rate measures your baseline, Target Heart Rate zones are used during exercise. Knowing your RHR helps calculate your Heart Rate Reserve (HRR), which is the difference between your maximum heart rate and your resting heart rate. This is used in the Karvonen formula to set specific intensity levels for training.
function calculateRHR() {
var age = parseFloat(document.getElementById('hrAge').value);
var currentRHR = parseFloat(document.getElementById('hrCurrent').value);
var activity = document.getElementById('hrActivity').value;
var gender = document.getElementById('hrGender').value;
var resultBox = document.getElementById('hrResult');
if (!age || !currentRHR) {
alert("Please enter both your age and current resting heart rate.");
return;
}
// Max HR Estimation (Fox Formula)
var maxHR = 220 – age;
var status = "";
var range = "";
var feedback = "";
var statusClass = "";
// Determine Status based on activity and RHR
if (activity === "athlete") {
if (currentRHR < 40) {
status = "Very Low (Athletic)";
statusClass = "hr-status-normal";
feedback = "Your heart rate is typical for an elite endurance athlete. If you feel dizzy, consult a doctor.";
} else if (currentRHR <= 55) {
status = "Excellent (Athlete)";
statusClass = "hr-status-excellent";
feedback = "You have outstanding cardiovascular fitness levels.";
} else if (currentRHR <= 65) {
status = "Good";
statusClass = "hr-status-normal";
feedback = "Your heart rate is healthy, though slightly higher than the typical elite athlete range.";
} else {
status = "Average";
statusClass = "hr-status-normal";
feedback = "Your RHR is within the normal range for a healthy adult.";
}
range = "40 – 60 BPM";
} else if (activity === "active") {
if (currentRHR < 50) {
status = "Low (Highly Fit)";
statusClass = "hr-status-excellent";
feedback = "Excellent efficiency. Your heart is very strong.";
} else if (currentRHR <= 70) {
status = "Ideal / Excellent";
statusClass = "hr-status-excellent";
feedback = "Your heart rate is in the ideal range for active individuals.";
} else if (currentRHR <= 85) {
status = "Normal / Average";
statusClass = "hr-status-normal";
feedback = "You are within the healthy clinical range of 60-100 BPM.";
} else {
status = "High Average";
statusClass = "hr-status-alert";
feedback = "Your heart rate is on the higher side. Consider more cardiovascular activity.";
}
range = "55 – 75 BPM";
} else {
// Sedentary
if (currentRHR < 60) {
status = "Low";
statusClass = "hr-status-normal";
feedback = "Low for a sedentary person. Ensure you aren't experiencing fatigue or dizziness.";
} else if (currentRHR <= 80) {
status = "Normal";
statusClass = "hr-status-normal";
feedback = "Your heart rate is in the standard range for most adults.";
} else if (currentRHR <= 100) {
status = "High Normal";
statusClass = "hr-status-alert";
feedback = "While clinically normal, lower RHR is associated with better longevity.";
} else {
status = "Tachycardia Range (High)";
statusClass = "hr-status-alert";
feedback = "A resting heart rate consistently over 100 should be discussed with a physician.";
}
range = "65 – 85 BPM";
}
// Gender adjustment for range (Females typically have slightly higher RHR due to smaller heart size)
if (gender === "female" && activity !== "athlete") {
range = (parseInt(range.split(" – ")[0]) + 3) + " – " + (parseInt(range.split(" – ")[1]) + 3) + " BPM";
}
// Display Results
document.getElementById('statusVal').innerHTML = status;
document.getElementById('statusVal').className = "hr-metric-value " + statusClass;
document.getElementById('rangeVal').innerText = range;
document.getElementById('maxHRVal').innerText = maxHR + " BPM";
document.getElementById('hrFeedback').innerText = feedback;
resultBox.style.display = "block";
resultBox.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}