Stage 1: No visible hair loss
Stage 2: Minor recession at temples
Stage 3: Deep recession at temples (Early Baldness)
Stage 4: Thinning at the crown (Vertex)
Stage 5: Significant loss, bridge between front and crown narrowing
Stage 6: Frontal and crown areas merged
Stage 7: Only a wreath of hair remains
No baldness in immediate family
One side of family has hair loss
Both sides of family have hair loss
Both parents/grandparents have advanced baldness
Low (Normal shedding, < 50 hairs/day)
Moderate (Noticeable hair in shower/pillow)
High (Significant thinning appearing rapidly)
Your Results
Understanding Male Pattern Baldness (Androgenetic Alopecia)
Male pattern baldness is primarily driven by genetics and the hormone Dihydrotestosterone (DHT). This calculator uses the Norwood Scale, the gold standard for classifying hair loss stages, combined with genetic predispositions and current shedding rates to estimate future progression.
The Factors Involved
Age Factor: Hair loss occurring before age 25 often indicates a higher sensitivity to DHT and a more aggressive progression.
The Norwood Scale: This ranges from Stage 1 (full head of hair) to Stage 7 (classic horseshoe pattern). Early intervention is most effective at Stages 2 and 3.
Genetics: While the "baldness gene" on the X chromosome from the mother's side is famous, hair loss is polygenic, meaning it can be inherited from either parent.
Shedding: It is normal to lose 50-100 hairs daily. Consistently exceeding this rate may signal the onset of "miniaturization," where hair follicles shrink over time.
Practical Examples
Example 1: A 22-year-old at Norwood Stage 2 with a strong family history. The calculator would likely indicate a "High Risk" because early onset combined with genetics often leads to Stage 5 or higher by age 50.
Example 2: A 45-year-old at Norwood Stage 2 with minimal shedding and no family history. This individual likely has "Low Risk" and is experiencing mature hairline recession rather than progressive baldness.
Next Steps
If your result indicates a moderate to high risk, consider consulting a dermatologist. Common FDA-approved treatments include topical solutions and oral medications designed to block DHT or stimulate blood flow to the follicles. Early detection is the single most important factor in hair preservation.
function calculateHairRisk() {
var age = parseFloat(document.getElementById("currentAge").value);
var scale = parseInt(document.getElementById("norwoodScale").value);
var genetics = parseInt(document.getElementById("genetics").value);
var shedding = parseInt(document.getElementById("shedding").value);
var resultDiv = document.getElementById("hairResult");
if (isNaN(age) || age 120) {
alert("Please enter a valid age.");
return;
}
var riskScore = 0;
// Logic: Younger age + higher Norwood = Higher Risk
if (age < 25) {
riskScore += (scale * 2.5);
} else if (age < 40) {
riskScore += (scale * 1.5);
} else {
riskScore += (scale * 0.8);
}
// Add genetic weight
riskScore += (genetics * 3);
// Add shedding weight
riskScore += (shedding * 4);
var riskLevel = "";
var prediction = "";
var color = "";
if (riskScore < 8) {
riskLevel = "Low Risk / Stable";
prediction = "Based on your profile, your hair loss appears stable. You may be experiencing a 'mature hairline' rather than active pattern baldness. Maintain a healthy scalp routine.";
color = "#38a169";
} else if (riskScore < 15) {
riskLevel = "Moderate Risk of Progression";
prediction = "There are signs of active miniaturization. At your current rate, you may progress 1-2 stages on the Norwood Scale over the next decade. Monitoring and preventative care are recommended.";
color = "#d69e2e";
} else {
riskLevel = "High Risk of Advanced Baldness";
prediction = "Your profile suggests an aggressive hair loss pattern. Without intervention, you are likely to reach Norwood Stage 5 or higher. Consult a professional regarding DHT blockers or regrowth treatments.";
color = "#e53e3e";
}
document.getElementById("riskTitle").innerText = "Analysis Result: " + riskLevel;
document.getElementById("riskTitle").style.color = color;
document.getElementById("riskScoreText").innerHTML = "Risk Factor Index: " + riskScore.toFixed(1);
document.getElementById("predictionText").innerText = prediction;
resultDiv.style.display = "block";
resultDiv.style.borderLeftColor = color;
resultDiv.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}