Edinburgh Postnatal Depression Score Calculator
Screen for postnatal depression using the 10-item Edinburgh Postnatal Depression Scale. Enter values for instant results with step-by-step formulas.
Edinburgh Postnatal Depression Score Calculator
Screen for postnatal depression using the 10-item Edinburgh Postnatal Depression Scale. Calculate EPDS score with clinical risk stratification and self-harm flagging.
Last updated: January 2026Reviewed by NovaCalculator Medical Editorial Team
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Each of the 10 questions is scored 0 to 3 based on symptom frequency over the past 7 days. Items 1 and 2 are reverse-scored (positive experiences). A total score of 13 or above indicates probable depression. Question 10 about self-harm requires independent clinical attention regardless of the total score.
Last reviewed: January 2026
Worked Examples
Example 1: High-Risk Postnatal Screening
Example 2: Normal Postpartum Adjustment
Background & Theory
The Edinburgh Postnatal Depression 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 Edinburgh Postnatal Depression 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
Formula
EPDS Total = Sum of 10 Items (each scored 0-3) | Range: 0-30
Each of the 10 questions is scored 0 to 3 based on symptom frequency over the past 7 days. Items 1 and 2 are reverse-scored (positive experiences). A total score of 13 or above indicates probable depression. Question 10 about self-harm requires independent clinical attention regardless of the total score.
Worked Examples
Example 1: High-Risk Postnatal Screening
Problem: A mother 6 weeks postpartum scores: Q1=2, Q2=2, Q3=2, Q4=2, Q5=2, Q6=2, Q7=1, Q8=2, Q9=1, Q10=1.
Solution: Total Score = 2+2+2+2+2+2+1+2+1+1 = 17\nThreshold for probable depression: 13\nScore 17 > 13: Likely Depression\nSelf-harm item (Q10) = 1: FLAGGED - requires immediate assessment\nAnxiety subscale (Q3+Q4+Q5) = 6/9\nDepression subscale (Q1+Q2+Q7+Q8+Q9) = 8/15\nCoping (Q6) = 2/3
Result: EPDS Score: 17/30 | Risk: Likely Depression | Self-Harm: FLAGGED | Urgent clinical assessment recommended
Example 2: Normal Postpartum Adjustment
Problem: A mother 8 weeks postpartum scores: Q1=0, Q2=0, Q3=1, Q4=1, Q5=0, Q6=1, Q7=0, Q8=0, Q9=0, Q10=0.
Solution: Total Score = 0+0+1+1+0+1+0+0+0+0 = 3\nThreshold for probable depression: 13\nScore 3 < 10: Low Risk\nSelf-harm item (Q10) = 0: No concern\nAnxiety subscale = 2/9\nDepression subscale = 0/15\nCoping = 1/3
Result: EPDS Score: 3/30 | Risk: Low | Self-Harm: None | Continue routine screening
Frequently Asked Questions
What is the Edinburgh Postnatal Depression Scale and who developed it?
The Edinburgh Postnatal Depression Scale, commonly abbreviated as EPDS, is a 10-item self-report questionnaire designed to screen for postnatal depression in women who have recently given birth. It was developed in 1987 by John Cox, Jeni Holden, and Ruth Sagovsky at health centers in Edinburgh and Livingston, Scotland. The scale was specifically created because existing depression screening tools contained somatic symptoms like fatigue and appetite changes that overlap with normal postpartum experiences, leading to high false-positive rates. The EPDS focuses on emotional and cognitive symptoms of depression, making it more appropriate for the postnatal period. It has since been validated in over 60 languages and is used worldwide as the standard screening tool for perinatal mental health assessment in both clinical practice and research settings.
How does the EPDS compare to other depression screening tools?
The EPDS was specifically designed for the perinatal population, giving it important advantages over general depression screeners like the PHQ-9 or Beck Depression Inventory. General tools include somatic items such as sleep disturbance, appetite changes, fatigue, and concentration difficulties that are common normal experiences in pregnancy and postpartum, leading to inflated scores and false positives. The EPDS avoids these confounders by focusing on emotional and cognitive symptoms. Studies comparing the EPDS to the PHQ-9 in perinatal populations show that the EPDS has comparable sensitivity of around 80 to 86 percent but better specificity of 78 to 87 percent because it produces fewer false positives. The PHQ-9 remains useful as a complementary tool for severity assessment once depression is suspected. Some clinics use both the EPDS for screening and the PHQ-9 for monitoring treatment response.
How common is postnatal depression and what are the risk factors?
Postnatal depression affects approximately 10 to 20 percent of women in the first year after giving birth, making it one of the most common complications of childbirth. Major risk factors include a personal or family history of depression or anxiety, depression or anxiety during pregnancy, lack of social support, relationship difficulties, stressful life events during pregnancy or postpartum, previous pregnancy loss, traumatic birth experience, and infant health problems. Socioeconomic factors including financial stress, young maternal age, and unplanned pregnancy also increase risk. Biological factors include hormonal fluctuations after delivery, sleep deprivation, and thyroid dysfunction. Women with multiple risk factors have a cumulative probability of developing postnatal depression that can exceed 40 percent. Early identification through screening programs like the EPDS allows timely intervention that can significantly improve outcomes for both mother and child.
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.
Does Edinburgh Postnatal Depression Score Calculator work offline?
Once the page is loaded, the calculation logic runs entirely in your browser. If you have already opened the page, most calculators will continue to work even if your internet connection is lost, since no server requests are needed for computation.
How do I verify Edinburgh Postnatal Depression Score Calculator's result independently?
The Formula section on this page shows the equation used. You can reproduce the calculation manually or in a spreadsheet using those steps. Compare your answer against the worked examples in the Examples section, which use known reference values so you can confirm the calculator is behaving as expected.
References
Reviewed by Rahul Singh, Health & Wellness Specialist · Editorial policy