#esrd-calc-container {
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 30px;
background-color: #ffffff;
box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.esrd-header {
text-align: center;
margin-bottom: 30px;
}
.esrd-header h2 {
color: #2c3e50;
margin-bottom: 10px;
font-size: 28px;
}
.esrd-header p {
color: #7f8c8d;
font-size: 16px;
}
.form-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
margin-bottom: 25px;
}
@media (max-width: 600px) {
.form-grid {
grid-template-columns: 1fr;
}
}
.input-group {
margin-bottom: 5px;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #34495e;
font-size: 14px;
}
.input-group input, .input-group select {
width: 100%;
padding: 12px;
border: 2px solid #dfe6e9;
border-radius: 6px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.input-group input:focus, .input-group select:focus {
border-color: #3498db;
outline: none;
}
.input-suffix {
position: relative;
}
.input-suffix span {
position: absolute;
right: 15px;
top: 50%;
transform: translateY(-50%);
color: #7f8c8d;
font-size: 14px;
pointer-events: none;
}
.calc-btn {
display: block;
width: 100%;
padding: 15px;
background-color: #3498db;
color: white;
border: none;
border-radius: 6px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.2s;
margin-top: 10px;
}
.calc-btn:hover {
background-color: #2980b9;
}
#results-area {
margin-top: 30px;
padding: 20px;
background-color: #f8f9fa;
border-radius: 6px;
border-left: 5px solid #3498db;
display: none;
}
.result-row {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 15px;
padding-bottom: 15px;
border-bottom: 1px solid #e9ecef;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
padding-bottom: 0;
}
.result-label {
font-size: 16px;
color: #555;
font-weight: 600;
}
.result-value {
font-size: 24px;
font-weight: 700;
color: #2c3e50;
}
.stage-indicator {
padding: 5px 10px;
border-radius: 4px;
color: white;
font-size: 14px;
font-weight: bold;
}
.stage-normal { background-color: #27ae60; }
.stage-warning { background-color: #f39c12; }
.stage-critical { background-color: #c0392b; }
.article-content {
margin-top: 50px;
border-top: 1px solid #eee;
padding-top: 20px;
}
.article-content h3 {
color: #2c3e50;
margin-top: 20px;
}
.article-content p {
margin-bottom: 15px;
color: #555;
}
.article-content ul {
margin-left: 20px;
margin-bottom: 15px;
}
.article-content li {
margin-bottom: 8px;
}
.disclaimer {
font-size: 12px;
color: #95a5a6;
margin-top: 20px;
font-style: italic;
}
ESRD & eGFR Calculator
Estimate Glomerular Filtration Rate and Determine Chronic Kidney Disease Stage
Male
Female
years
mg/dL
Estimated GFR (eGFR)
—
CKD Stage
—
Status Interpretation
—
⚠️ This result indicates Kidney Failure (ESRD). Please consult a nephrologist immediately.
What is the ESRD Calculator?
End-Stage Renal Disease (ESRD), also known as Kidney Failure or CKD Stage 5, represents the final stage of chronic kidney disease where the kidneys can no longer function on their own to sustain life. This calculator uses the CKD-EPI 2021 (race-free) equation to estimate your Glomerular Filtration Rate (eGFR), which is the primary metric used by medical professionals to diagnose ESRD.
How is eGFR Calculated?
The Estimated Glomerular Filtration Rate (eGFR) determines how well your kidneys are filtering waste from your blood. The calculation considers three main factors:
- Serum Creatinine: A waste product generated by muscles, measured via a blood test (mg/dL).
- Age: Kidney function naturally declines slightly with age.
- Biological Sex: Used to account for differences in average muscle mass between males and females.
Understanding CKD Stages and ESRD
Chronic Kidney Disease is divided into 5 stages based on the eGFR value (measured in mL/min/1.73m²):
- Stage 1 (GFR > 90): Normal or high kidney function (kidney damage may still be present).
- Stage 2 (GFR 60-89): Mildly decreased kidney function.
- Stage 3a (GFR 45-59): Mild to moderately decreased function.
- Stage 3b (GFR 30-44): Moderate to severely decreased function.
- Stage 4 (GFR 15-29): Severely decreased function. Preparation for dialysis usually begins here.
- Stage 5 / ESRD (GFR < 15): Kidney Failure. At this stage, dialysis or a kidney transplant is typically required for survival.
Interpreting Your Results
If your result shows an eGFR below 15, it technically meets the definition of End-Stage Renal Disease (ESRD). However, a single test result is not a diagnosis. Dehydration, diet, and certain medications can temporarily affect creatinine levels. A confirmed diagnosis requires repeat testing and evaluation by a nephrologist.
Disclaimer: This tool is for informational and educational purposes only. It does not provide medical advice or diagnosis. The CKD-EPI 2021 formula is an estimation. Always consult a qualified healthcare provider for interpretation of laboratory results and medical decisions.
function calculateESRD() {
// 1. Get Input Values
var gender = document.getElementById('gender').value;
var age = parseFloat(document.getElementById('age').value);
var creatinine = parseFloat(document.getElementById('creatinine').value);
// 2. Validate Inputs
if (isNaN(age) || age < 1) {
alert("Please enter a valid age.");
return;
}
if (isNaN(creatinine) || creatinine = 90) {
stage = "Stage 1";
status = "Normal/High Function";
statusColor = "#27ae60";
} else if (eGFRRounded >= 60) {
stage = "Stage 2";
status = "Mildly Decreased";
statusColor = "#f1c40f"; // Yellow
} else if (eGFRRounded >= 45) {
stage = "Stage 3a";
status = "Mild to Moderate";
statusColor = "#f39c12"; // Orange
} else if (eGFRRounded >= 30) {
stage = "Stage 3b";
status = "Moderate to Severe";
statusColor = "#e67e22"; // Dark Orange
} else if (eGFRRounded >= 15) {
stage = "Stage 4";
status = "Severely Decreased";
statusColor = "#e74c3c"; // Red
} else {
stage = "Stage 5";
status = "Kidney Failure (ESRD)";
statusColor = "#c0392b"; // Dark Red
isESRD = true;
}
// 6. Update UI
document.getElementById('results-area').style.display = 'block';
document.getElementById('gfr-result').innerText = eGFRRounded + " mL/min/1.73m²";
document.getElementById('stage-result').innerText = stage;
document.getElementById('stage-result').className = "result-value"; // Reset class
document.getElementById('stage-result-container').style.color = statusColor;
document.getElementById('status-text').innerText = status;
document.getElementById('status-text').style.color = statusColor;
if (isESRD) {
document.getElementById('esrd-warning').style.display = 'block';
} else {
document.getElementById('esrd-warning').style.display = 'none';
}
}