Kidney Disease Risk Calculator

Assess your risk for chronic kidney disease (CKD) based on age, medical conditions, lab values, and lifestyle factors.

Demographic Information

years
Risk increases with age, especially after 60
1 45 years 100
Men have slightly higher CKD risk than women
African Americans have 3-4x higher risk of kidney failure
kg
Obesity increases CKD risk

Medical Conditions *

Diabetes is the leading cause of kidney disease
Hypertension is the second leading cause of kidney disease
Heart and kidney diseases are closely linked
Laboratory Values (Optional) Click to expand

If you know your lab values, enter them for a more accurate assessment

mg/dL
Normal range: 0.6-1.2 mg/dL (varies by lab)
mL/min/1.73m²
Normal: ≥90 mL/min/1.73m²
mg/g
Normal: <30 mg/g
mg/dL
Normal: 70-99 mg/dL

Family History and Lifestyle *

Having a first-degree relative with kidney disease doubles your risk
Smoking accelerates kidney damage
Long-term NSAID use can damage kidneys
Fields marked with * are required for accurate risk assessment.
Calculating your risk assessment...

Understanding Kidney Disease Risk

Chronic kidney disease (CKD) is a progressive condition in which the kidneys gradually lose function over time. Early detection is crucial because symptoms often don't appear until significant damage has occurred.

Key Risk Factors: Diabetes and hypertension are responsible for about two-thirds of all CKD cases. Other important factors include age, family history, cardiovascular disease, and certain medications.

Stages of Chronic Kidney Disease

Stage eGFR Range Description Prevalence Management
Stage 1 ≥90 mL/min Normal or high GFR with kidney damage 3.5% of adults Treatment of underlying cause, monitoring
Stage 2 60-89 mL/min Mildly reduced GFR with kidney damage 3.5% of adults Estimate progression, control risk factors
Stage 3 30-59 mL/min Moderately reduced GFR 7.5% of adults Evaluate and manage complications
Stage 4 15-29 mL/min Severely reduced GFR 0.4% of adults Prepare for kidney replacement therapy
Stage 5 <15 mL/min Kidney failure (ESRD) 0.2% of adults Dialysis or kidney transplantation

Common Symptoms of Kidney Disease

Early kidney disease often has no symptoms. As kidney function declines, symptoms may include:

  • Fatigue and weakness
  • Swelling in ankles, feet, or hands
  • Shortness of breath
  • Nausea and vomiting
  • Loss of appetite
  • Difficulty concentrating
  • Muscle cramps
  • Dry, itchy skin
  • Changes in urine output
  • High blood pressure

Laboratory Tests for Kidney Function

Test Normal Range What It Measures Clinical Significance
Serum Creatinine 0.6-1.2 mg/dL Waste product from muscle metabolism Higher levels indicate poorer kidney function
eGFR ≥90 mL/min/1.73m² Estimated glomerular filtration rate Best overall measure of kidney function
Urine ACR <30 mg/g Albumin-to-creatinine ratio in urine Measures kidney damage (albuminuria)
BUN 7-20 mg/dL Blood urea nitrogen Less specific than creatinine for kidney function
Electrolytes Varies Sodium, potassium, chloride, bicarbonate Kidneys regulate electrolyte balance

Kidney Health Protection Strategies

Control Blood Pressure
Maintain BP below 130/80 mmHg. Monitor regularly and take prescribed medications as directed.
Manage Blood Sugar
Keep HbA1c below 7% if diabetic. Regular monitoring and proper medication are essential.
Healthy Diet
Reduce sodium, limit protein if advised, eat more fruits and vegetables, and maintain healthy weight.
Avoid Nephrotoxins
Limit NSAIDs, certain antibiotics, and contrast dyes. Stay hydrated and avoid excessive alcohol.
Regular Exercise
Aim for 150 minutes of moderate exercise per week to control weight, BP, and blood sugar.
Quit Smoking
Smoking accelerates kidney damage. Seek help to quit through medications or counseling.

Early Detection Saves Kidney Function

1

Annual Screening: People with diabetes, hypertension, or family history should have annual kidney function tests including serum creatinine, eGFR, and urine albumin.

2

Monitor High-Risk Medications: If taking medications that can affect kidneys (NSAIDs, certain antibiotics, contrast dyes), ensure proper monitoring of kidney function.

3

Stay Hydrated: Drink adequate water (unless fluid restricted) to help kidneys clear toxins. Dark urine often indicates dehydration.

4

Know Your Numbers: Regularly check and record your blood pressure, blood sugar (if diabetic), and kidney function test results.

Important Note: This calculator provides an estimate of your kidney disease risk based on known risk factors. It is not a diagnostic tool. If you have concerns about your kidney health or notice symptoms, consult a healthcare professional, preferably a nephrologist.

Frequently Asked Questions

In early stages, kidney damage can sometimes be slowed or stopped with proper treatment, but the damage itself is usually irreversible. The goal of treatment is to prevent further progression. Some acute kidney injuries can be reversed if treated promptly, but chronic kidney disease is typically progressive. Early detection and management are crucial to preserving remaining kidney function.

For people with no risk factors, a baseline check at age 40 and then every 2-3 years is reasonable. For those with diabetes, annual screening is essential. For those with hypertension, heart disease, or family history of kidney disease, annual testing is recommended. If you have stage 3 CKD or higher, more frequent monitoring (every 3-6 months) is necessary.

Creatinine is a waste product from muscle metabolism that kidneys normally filter out. High creatinine levels suggest poor kidney function. eGFR (estimated glomerular filtration rate) is a calculated value based on creatinine, age, gender, and race that estimates how well your kidneys are filtering waste. eGFR is a more accurate measure of kidney function than creatinine alone because it accounts for individual differences in muscle mass and other factors.

No, there are two main types: acute kidney injury (AKI) and chronic kidney disease (CKD). AKI is a sudden decrease in kidney function, often reversible with treatment. CKD is a gradual, progressive loss of kidney function over months or years, usually irreversible. Some conditions like glomerulonephritis can be either acute or chronic. The distinction is important because treatment approaches differ significantly.

Dietary recommendations depend on the stage of kidney disease and individual lab values. Common restrictions include: sodium (to control blood pressure), potassium (if levels are high), phosphorus (to prevent bone disease), and protein (in later stages to reduce waste buildup). Processed foods, canned soups, bananas, oranges, potatoes, dairy products, and nuts may need limitation. Always consult a renal dietitian for personalized advice.