CAGE Score Calculator
Screen for alcohol use disorder using the 4-question CAGE questionnaire. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateClinical Interpretation
Alcohol use disorder is unlikely based on this screening.
Recommendation
No further alcohol-specific evaluation indicated at this time.
Test Characteristics (at cutoff of 2+)
Formula
Each question is scored as 0 (No) or 1 (Yes). C = Cut down, A = Annoyed, G = Guilty, E = Eye-opener. A total score of 2 or more is considered clinically significant for alcohol use disorder screening.
Last reviewed: January 2026
Worked Examples
Example 1: Patient with Two Positive CAGE Responses
Example 2: Patient with All Four Positive Responses
Background & Theory
The CAGE Score Calculator applies the following established principles and formulas. Health and medicine calculators are grounded in validated physiological measurement methods established through decades of clinical research. Body Mass Index, or BMI, is calculated by dividing weight in kilograms by height in meters squared (kg/m²), a formula originating from Adolphe Quetelet's 19th-century statistical work and later codified by the WHO into standard classifications: underweight below 18.5, normal weight 18.5 to 24.9, overweight 25 to 29.9, and obese at 30 and above. Basal Metabolic Rate quantifies the minimum energy required to sustain life at rest. The Mifflin-St Jeor equation, published in 1990 and widely regarded as the most accurate for most adults, calculates BMR as (10 × weight in kg) + (6.25 × height in cm) − (5 × age) ± sex adjustment. The older Harris-Benedict equations, revised in 1984 by Roza and Shizgal, remain in common use. Total Daily Energy Expenditure is derived by multiplying BMR by a physical activity factor ranging from 1.2 for sedentary individuals to 1.9 for extremely active ones, following the methodology validated by doubly labeled water studies. Body fat percentage can be estimated without laboratory equipment using the U.S. Navy circumference method, which uses neck, waist, and hip measurements, or via BMI-derived equations adjusted for age and sex. The Jackson-Pollock skinfold method offers higher precision with calipers. Blood pressure classification, according to the American College of Cardiology and the 2017 ACC/AHA guidelines, defines normal as below 120/80 mmHg, elevated as 120 to 129 systolic, and hypertension stage 1 as 130 to 139 systolic or 80 to 89 diastolic. Target heart rate zones for aerobic exercise are derived from maximum heart rate estimates, most commonly using the formula 220 minus age in years, with moderate-intensity training typically defined as 50 to 70 percent of maximum heart rate and vigorous intensity at 70 to 85 percent, consistent with CDC and American Heart Association guidelines. These thresholds guide safe and effective cardiovascular conditioning.
History
The history behind the CAGE Score Calculator traces back through the following developments. The history of health measurement stretches back to ancient Greece, where Hippocrates around 400 BCE laid the foundation for observational medicine by systematically recording patient symptoms, diet, and environment. His humoral theory, though scientifically superseded, established the principle that the body operates as an interconnected system subject to measurable imbalance. The transformation toward modern medicine accelerated in the 19th century. Louis Pasteur and Robert Koch developed germ theory in the 1860s and 1870s, identifying microorganisms as disease agents and enabling targeted interventions. Florence Nightingale, working during the Crimean War in the 1850s, introduced statistical analysis to nursing practice, demonstrating through data visualization that sanitation reduced mortality. Her work is foundational to evidence-based health measurement. The discovery of vitamins in the early 20th century, beginning with Casimir Funk's coinage of the term in 1912 and culminating in the isolation of vitamins A through K, created the field of nutritional science and gave rise to dietary reference intake frameworks. The World Health Organization, founded in 1948, subsequently established global standards for health metrics, disease classification through the International Classification of Diseases, and recommended daily allowances. The BMI as a clinical screening tool gained traction in the 1970s through Ancel Keys' large-scale epidemiological work, which validated Quetelet's index as a population-level obesity indicator. Through the 1980s and 1990s, the Framingham Heart Study produced landmark data linking cholesterol, blood pressure, and lifestyle factors to cardiovascular disease risk, directly shaping the numeric thresholds still used in health calculators. The evidence-based medicine movement, formalized by Gordon Guyatt and colleagues at McMaster University in the early 1990s, demanded that all health recommendations derive from systematically graded clinical evidence. The digital health era beginning in the 2000s brought these formulas to consumer devices, wearable sensors, and smartphone applications, expanding access to health self-monitoring on a global scale and enabling population-level data collection that continues to refine clinical reference ranges.
Frequently Asked Questions
Sources & References
- 1Ewing JA. Detecting Alcoholism: The CAGE Questionnaire. JAMA. 1984;252(14):1905-1907
- 2Dhalla S, Kopec JA. The CAGE Questionnaire for Alcohol Misuse: A Review of Reliability and Validity Studies. Clinical and Investigative Medicine. 2007;30(1):33-41
- 3NIAAA - Alcohol Screening and Brief Intervention for Youth
Formula
CAGE Score = C + A + G + E (each 0 or 1, total 0-4)
Each question is scored as 0 (No) or 1 (Yes). C = Cut down, A = Annoyed, G = Guilty, E = Eye-opener. A total score of 2 or more is considered clinically significant for alcohol use disorder screening.
Worked Examples
Example 1: Patient with Two Positive CAGE Responses
Problem: A 45-year-old male patient answers yes to feeling he should Cut down on his drinking and yes to feeling Guilty about his drinking. The other two questions are answered no.
Solution: CAGE Score = C(1) + A(0) + G(1) + E(0) = 2\nA score of 2 or more is clinically significant.\nSensitivity at this cutoff: ~86%\nSpecificity at this cutoff: ~93%\nPositive screen indicates need for further evaluation.
Result: CAGE Score: 2 (Clinically Significant) - Further assessment with full AUDIT recommended
Example 2: Patient with All Four Positive Responses
Problem: A 52-year-old female patient answers yes to all four CAGE questions: she has felt she should cut down, been annoyed by criticism of her drinking, felt guilty, and had morning eye-opener drinks.
Solution: CAGE Score = C(1) + A(1) + G(1) + E(1) = 4\nA perfect score of 4 indicates very high probability of alcohol dependence.\nThe Eye-opener response is particularly concerning as it suggests physical dependence.\nAll four domains of problematic drinking are affected.
Result: CAGE Score: 4 (Very High Probability) - Immediate comprehensive assessment and specialist referral recommended
Frequently Asked Questions
What is the CAGE questionnaire and how is it used in clinical practice?
The CAGE questionnaire is a widely used four-question screening tool designed to identify potential alcohol use disorders in clinical settings. The acronym CAGE stands for Cut down, Annoyed, Guilty, and Eye-opener, representing the four key questions asked. Developed by Dr. John Ewing in 1984, it has become one of the most commonly administered alcohol screening instruments worldwide. Clinicians use it during routine health assessments, emergency department visits, and pre-surgical evaluations to quickly identify patients who may benefit from further evaluation or intervention for problematic drinking patterns.
What does each letter in CAGE stand for and why were these questions chosen?
Each letter in CAGE represents a specific question targeting different aspects of problematic alcohol use. C stands for Cut down, asking if the person has felt they should reduce their drinking. A stands for Annoyed, inquiring about irritation from others criticizing their drinking habits. G stands for Guilty, exploring feelings of guilt related to alcohol consumption. E stands for Eye-opener, asking about morning drinking to relieve hangover symptoms. These four questions were selected because they capture the psychological, social, and physiological dimensions of alcohol dependence in a concise format that takes less than one minute to administer.
What CAGE score is considered clinically significant for alcohol use disorder?
A CAGE score of 2 or higher out of 4 is generally considered clinically significant and suggestive of an alcohol use disorder. At this cutoff, the CAGE questionnaire demonstrates a sensitivity of approximately 86 percent and a specificity of approximately 93 percent for identifying alcohol problems. A score of 1 may still warrant further discussion, particularly in populations with higher prevalence of alcohol use disorders. Some clinicians use a lower threshold of 1 positive response in certain populations such as pregnant women or trauma patients, where even mild alcohol misuse carries significant risk.
Can the CAGE questionnaire be used in all patient populations?
While the CAGE is widely applicable, it has certain limitations across different populations. Research suggests it may be less sensitive in women, younger adults, and elderly patients compared to middle-aged men, for whom it was originally validated. Cultural factors can also affect response patterns, as norms around drinking and willingness to disclose vary across cultures. In pregnant populations, a lower threshold score of 1 is often recommended due to the severity of fetal alcohol spectrum disorders. The CAGE has been validated in multiple languages and cultural settings, but clinicians should consider supplementing it with population-specific tools when screening diverse patient groups.
What are the limitations of the CAGE screening tool?
The CAGE questionnaire has several important limitations that clinicians should understand. It does not quantify the amount or frequency of alcohol consumption, so it cannot distinguish between different levels of drinking severity. Because it asks about lifetime experiences, it may produce positive results in individuals who previously had problems but are now in recovery. It is less effective at detecting binge drinking patterns or hazardous use that has not yet progressed to dependence. The yes-or-no format lacks nuance, and patients may underreport symptoms due to stigma or denial. For these reasons, a positive CAGE screen should always be followed by a more comprehensive clinical assessment.
How should clinicians interpret and act on CAGE results?
Clinicians should interpret CAGE results within the broader clinical context rather than relying solely on the numeric score. A score of zero generally indicates low risk, but clinicians should still ask about current drinking patterns. A score of 1 suggests possible risk and warrants brief counseling and follow-up at the next visit. Scores of 2 or higher indicate a positive screen that requires comprehensive assessment, which may include the full AUDIT questionnaire, laboratory tests such as liver function panels, and a detailed clinical interview. Appropriate interventions range from brief motivational interviewing for lower scores to referral for specialized addiction treatment for higher scores.
References
- Ewing JA. Detecting Alcoholism: The CAGE Questionnaire. JAMA. 1984;252(14):1905-1907
- Dhalla S, Kopec JA. The CAGE Questionnaire for Alcohol Misuse: A Review of Reliability and Validity Studies. Clinical and Investigative Medicine. 2007;30(1):33-41
- NIAAA - Alcohol Screening and Brief Intervention for Youth
Reviewed by Rahul Singh, Health & Wellness Specialist · Editorial policy