CAGE Questionnaire Calculator
Use our free Cagequestionnaire Calculator to get personalized health results. Based on validated medical formulas and clinical guidelines.
Calculator
Adjust values & calculateNo clinically significant indicators detected. Standard screening is negative.
Formula
Each of the four CAGE questions is scored 0 (No) or 1 (Yes). The total score ranges from 0 to 4. A score of 2 or more is considered clinically significant, with approximately 93% sensitivity for detecting alcohol problems.
Last reviewed: January 2026
Worked Examples
Example 1: Positive CAGE Screening
Example 2: Negative CAGE Screening
Background & Theory
The CAGE Questionnaire 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 Questionnaire 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
Formula
CAGE Score = C + A + G + E (each 0 or 1)
Each of the four CAGE questions is scored 0 (No) or 1 (Yes). The total score ranges from 0 to 4. A score of 2 or more is considered clinically significant, with approximately 93% sensitivity for detecting alcohol problems.
Worked Examples
Example 1: Positive CAGE Screening
Problem: A patient answers Yes to feeling the need to Cut down, Yes to feeling Annoyed by criticism about drinking, No to Guilty feelings, and Yes to needing an Eye-opener.
Solution: CAGE Score = C(1) + A(1) + G(0) + E(1) = 3\nScore >= 2: Positive screen\nInterpretation: Three positive responses strongly suggest alcohol use disorder.\nSensitivity at this threshold: ~93%\nRecommendation: Comprehensive assessment and specialist referral.
Result: CAGE Score: 3/4 (High Risk) - Positive screen requiring follow-up evaluation
Example 2: Negative CAGE Screening
Problem: A patient answers No to Cut down, No to Annoyed, Yes to occasional Guilty feelings about drinking, and No to Eye-opener.
Solution: CAGE Score = C(0) + A(0) + G(1) + E(0) = 1\nScore < 2: Below clinical threshold\nInterpretation: One positive response is below the standard cutoff.\nRecommendation: May warrant further clinical conversation but does not meet positive screen criteria.
Result: CAGE Score: 1/4 (Low-Moderate Risk) - Below clinical threshold
Frequently Asked Questions
What is the CAGE questionnaire and what does it screen for?
The CAGE questionnaire is a brief, four-question screening tool designed to identify individuals who may have alcohol use problems or alcohol dependence. The acronym CAGE stands for Cut down, Annoyed, Guilty, and Eye-opener, representing the four key questions. Developed by Dr. John Ewing in 1968 and first published in 1984, it has become one of the most widely used screening instruments in clinical medicine due to its simplicity, brevity, and effectiveness. The CAGE questionnaire is not a diagnostic tool but rather a screening instrument that flags individuals who should undergo more comprehensive evaluation. It takes less than one minute to administer and can be incorporated into routine clinical interviews.
How is the CAGE score interpreted and what score indicates a problem?
The CAGE questionnaire is scored by counting the number of yes responses, with each positive answer receiving one point, producing a total score ranging from 0 to 4. A score of 2 or more is considered clinically significant and suggests a high likelihood of alcohol-related problems or alcohol dependence. At a cutoff of 2, the CAGE has a sensitivity of approximately 93 percent and specificity of approximately 76 percent for identifying alcohol problems. A score of 1 may warrant further discussion and clinical observation. However, clinicians should note that CAGE was primarily validated for detecting alcohol dependence rather than hazardous drinking patterns, and it may be less sensitive for detecting early-stage or moderate alcohol problems, particularly in certain populations.
What are the limitations of the CAGE questionnaire in clinical practice?
While the CAGE questionnaire is widely used and clinically valuable, it has several important limitations. First, it was primarily designed to detect alcohol dependence and may miss individuals with hazardous but non-dependent drinking patterns, particularly binge drinkers. Second, the CAGE has shown lower sensitivity in women, younger populations, and certain ethnic groups compared to white male populations where it was originally validated. Third, it does not assess quantity or frequency of drinking, current versus lifetime problems, or the severity of alcohol-related issues. Fourth, patients may underreport or deny symptoms due to stigma. For these reasons, many clinical guidelines now recommend the AUDIT (Alcohol Use Disorders Identification Test) as a more comprehensive primary screening tool.
How does the CAGE questionnaire compare to other alcohol screening tools?
Several validated screening tools exist alongside the CAGE, each with distinct strengths. The AUDIT (Alcohol Use Disorders Identification Test) is a 10-question tool developed by the World Health Organization that assesses both drinking quantity and dependence symptoms, making it more comprehensive. The AUDIT-C is a shortened 3-question version focusing on consumption patterns. The MAST (Michigan Alcohol Screening Test) is a 25-question instrument that provides more detailed assessment. The T-ACE and TWEAK questionnaires were specifically developed for screening pregnant women. Research suggests that AUDIT and AUDIT-C have superior sensitivity for detecting hazardous drinking compared to CAGE, while CAGE performs comparably or better for detecting alcohol dependence specifically.
When should the CAGE questionnaire be administered in a clinical setting?
The CAGE questionnaire should be considered during routine health assessments, annual physical examinations, emergency department visits, psychiatric evaluations, and prenatal care visits. The United States Preventive Services Task Force recommends alcohol screening for all adults aged 18 and older in primary care settings. The CAGE is particularly useful in time-constrained environments such as emergency departments and busy primary care practices because of its brevity. It can be incorporated naturally into clinical conversation without appearing as a formal questionnaire, which may improve patient honesty. However, for comprehensive screening programs, many experts now recommend using the AUDIT-C as the primary screening tool and reserving the CAGE as a supplementary instrument.
Is my data stored or sent to a server?
No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.
References
Reviewed by Rahul Singh, Health & Wellness Specialist · Editorial policy