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EASI Score Calculator

Updated Nov 12, 2026 By Infinity Calculator Formulas Sources Medical disclaimer
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For patients of any age with confirmed atopic dermatitis. EASI is scored the same way at every age. For patients under 8 years of age, choose the pediatric multipliers below.

Patient Age Adjustment

Is this patient under 8 years of age?
Active multipliers: Head/Neck 0.10 · Upper Limbs 0.20 · Trunk 0.30 · Lower Limbs 0.40

Body Region Scoring

Total EASI Score

Total EASI Score
0.0
out of a maximum of 72.0
Clear
EASI75 Target (75% improvement from this baseline): 0.00
EASI90 Target (90% improvement from this baseline): 0.00

Regional Score Summary

Body Region Erythema Edema/Papulation Excoriation Lichenification Area Score Multiplier Region Score

Region Score vs. Maximum Possible

Step-by-Step Solution

Introduction

The EASI score (Eczema Area and Severity Index) tells you how bad a person's atopic dermatitis (eczema) is. This free EASI score calculator adds up each region as you pick the scores and shows the total right away.

The tool looks at four body parts: head and neck, upper limbs, trunk, and lower limbs. For each part, you rate four skin signs from 0 to 31:

  • Erythema (redness)
  • Edema/papulation (swelling or raised skin)
  • Excoriation (scratch marks)
  • Lichenification (thick, leathery skin)

You also pick an area score from 0 to 6 that shows how much of that body part has eczema. Each body part is then multiplied by its own number, since some parts of the body are bigger than others. Add the four parts together and you get a total EASI score from 0 to 72.1 A higher score means worse eczema.

The calculator also shows your severity band (clear, almost clear, mild, moderate, severe, or very severe) and your EASI75 and EASI90 targets. These are the scores you would reach if the eczema got 75% or 90% better. Doctors and drug studies use these targets to track progress.

EASI is scored the same way at every age, but the region multipliers change for children under 8. If the patient is under 8, switch on the pediatric setting.1 The calculator will then use the right body size numbers for a young child.

How to use our EASI Score Calculator

Enter the patient's age group, then score four eczema signs and the affected skin area for each of the four body regions. The calculator gives you a total EASI score out of 72, a severity rating, EASI75 and EASI90 targets, a score table, and a step-by-step solution.

Patient age adjustment: Pick "Yes" if the patient is under 8 years old, or "No" if they are 8 or older. This sets the body surface area multipliers used for each region. If a child turns 8 during a few months of tracking, using the same setting throughout is preferred so the scores stay comparable. Over a year or longer, switch to the 8 or older setting.1

Body region tabs: Click a tab to open Head/Neck, Upper Limbs, Trunk, or Lower Limbs. Score all five fields in each region. A check mark shows when a region is done.

Erythema: Choose 0 to 3 for how red the skin looks in that region. 0 means none, 1 is just visible, 2 is obvious, and 3 is severe.2 On darker skin, redness can look more violet than pink.2 Take the skin's own color into account so redness is not underrated, which often means scoring erythema one level higher.1

Edema/Papulation: Choose 0 to 3 for swelling, bumps, or raised skin. This sign points to acute eczema.1

Excoriation: Choose 0 to 3 for scratch marks and broken or scraped skin.

Lichenification: Choose 0 to 3 for thick, leathery skin with deep lines. This sign points to long-term eczema.1

Percentage of region affected: Drag the slider from 0 to 6 to match how much of that region has active eczema. Step 0 is 0% and step 6 covers 90% to 100%.1

Calculate: Click this button to update the total EASI score, severity band, chart, and full math breakdown.

Reset: Click to clear all scores, sliders, and the age setting, then confirm your choice.

What Is the EASI Score?

EASI stands for Eczema Area and Severity Index. It is a tool doctors use to measure how bad atopic dermatitis (eczema) is on a person's skin. The score runs from 0 to 72.2 A higher score means worse eczema. Doctors use it to track if a treatment is working over time.

The Four Body Regions

EASI splits the body into four parts. Each part counts for a different share of the total score, because each part covers a different amount of skin1:

  • Head and neck (multiplier 0.10)
  • Upper limbs (arms), multiplier 0.20
  • Trunk (chest, belly, back), multiplier 0.30
  • Lower limbs (legs), multiplier 0.401

Kids under 8 years old have bigger heads and shorter legs. For them, the head and neck multiplier changes to 0.20 and the lower limbs change to 0.30.1

The Four Skin Signs

In each region, the doctor grades four signs from 0 to 3 (0 = none, 1 = mild, 2 = moderate, 3 = severe)1:

  • Erythema (skin redness)
  • Edema/papulation (raised, puffy, or bumpy skin, common in new flares)
  • Excoriation (scratch marks and broken skin)
  • Lichenification (thick, leathery skin with deep lines, common in long-term eczema)

Half points such as 1.5 and 2.5 may be used, but not 0.5, because any sign that is present counts as at least mild.2

The Area Score

The doctor also estimates how much of each region has eczema. That percent turns into a number from 0 to 6:

  • 0 = no eczema
  • 1 = 1% to 9%
  • 2 = 10% to 29%
  • 3 = 30% to 49%
  • 4 = 50% to 69%
  • 5 = 70% to 89%
  • 6 = 90% to 100%1

How the Math Works

For each region: add the four sign scores, multiply by the area score, then multiply by the region multiplier.1 Add all four region scores together to get the total EASI score.

What the Score Means

  • 0 is clear
  • 0.1 to 1.0 is almost clear
  • 1.1 to 7.0 is mild
  • 7.1 to 21.0 is moderate
  • 21.1 to 50.0 is severe2
  • 50.1 to 72.0 is very severe7

EASI75 and EASI90

These terms show how much a patient has improved. EASI75 means the score dropped by 75% from the starting score. EASI90 means it dropped by 90%. Drug trials report how many patients reach EASI75 and EASI90.6 If a patient starts at 20, an EASI75 means getting down to 5 or lower.

Good to Know

EASI only looks at eczema signs a doctor can see. It does not score itch, sleep loss, or how the rash affects daily life. It also leaves out dryness and scaling.1 Because of that, doctors often pair EASI with other tools, like a patient itch scale or a quality-of-life survey, to get the full picture.

Formulas used

Region EASI score 1
S_{\text{region}} = (E + I + Ex + L) \times A \times M
Total EASI score 1
\text{EASI} = S_{\text{head/neck}} + S_{\text{upper}} + S_{\text{trunk}} + S_{\text{lower}}
Standard multipliers (age 8 years or older) 1
M_{\text{head/neck}} = 0.10,\; M_{\text{upper}} = 0.20,\; M_{\text{trunk}} = 0.30,\; M_{\text{lower}} = 0.40
Pediatric multipliers (under 8 years) 1
M_{\text{head/neck}} = 0.20,\; M_{\text{upper}} = 0.20,\; M_{\text{trunk}} = 0.30,\; M_{\text{lower}} = 0.30
EASI75 target score
\text{EASI75} = \text{EASI} \times 0.25
EASI90 target score
\text{EASI90} = \text{EASI} \times 0.10
Maximum possible region score
S_{\text{region,max}} = 12 \times 6 \times M
Progress bar fill percentage
P = \frac{\text{EASI}}{72} \times 100\%

Frequently asked questions

What EASI score counts as severe eczema for treatments like dupilumab?

In the dupilumab trials for eczema across the body, in adults, in children 12 to 17 years and in children 6 months to 5 years, patients needed an EASI of 16 or higher to take part, as part of the trials' test for moderate-to-severe eczema.6 The trial in children 6 to 11 years needed an EASI of 21 or higher.6 A trial of eczema on the hands and feet used a hands-and-feet score instead, with no EASI cut-off.6 On the published EASI bands, severe eczema starts at 21.1.2 In England, NICE recommends dupilumab for adults only when the eczema has not responded to at least 1 other systemic treatment, or those treatments cannot be used or are not tolerated.8 NICE says to stop it at 16 weeks unless the EASI score has fallen by at least 50% and the DLQI, a quality-of-life score, has fallen by at least 4 points.8

Rules change by country and by insurance plan. Doctors also look at other things, like how much skin is involved, how bad the itch is, and whether creams and steroids already failed.

How much does an EASI score have to drop to count as real improvement?

About 6.6 points is the smallest drop a patient can actually feel.3 This is called the minimal clinically important difference (MCID).

Doctors also watch percent change:

  • EASI50: half as bad, a fair start
  • EASI75: a 75% drop, a result drug trials commonly report6
  • EASI90: a 90% drop, which drug trials also report6

The same drop in points is a bigger share of a low score than of a high one. A 5-point drop is half of a score of 10 but only a twelfth of a score of 60.

What is the difference between EASI and SCORAD?

Both measure eczema, but they count different things.

  • EASI runs 0 to 72.1 It only scores what a doctor sees: redness, swelling or raised bumps, scratch marks, and leathery skin, plus how much skin is involved.
  • SCORAD runs 0 to 103.5 It adds dryness, oozing, crusting, and it asks the patient about itch and lost sleep.5

A trained doctor takes about 6 minutes to score EASI.7 It is also the tool most drug trials use.2 SCORAD gives more of the patient's own view.

What is the difference between EASI and PASI?

They look alike because EASI was built by changing PASI, a score made for psoriasis.2 Each one is used for a different disease.

  • EASI is for atopic dermatitis (eczema). It grades redness, edema/papulation (swelling or raised bumps), excoriation, and lichenification.
  • PASI is for psoriasis. It grades redness, thickness, and scaling.9

PASI splits the body into head, arms, trunk and legs, weighted 0.1, 0.2, 0.3 and 0.4.9 EASI uses the same four regions and the same adult weights, and both scores top out at 72. EASI does not score scaling, and PASI does not score scratch marks.

Which body parts belong to each EASI region?

The four regions cover the whole body:

  • Head and neck: face, ears, scalp, and neck
  • Upper limbs: shoulders, arms, forearms, and hands1
  • Trunk: chest, belly, back, armpits, and groin2
  • Lower limbs: buttocks, thighs, legs, and feet2

Hands go with the arms and buttocks go with the legs. Nothing is scored twice.

How do you estimate the percent of a body region covered by eczema?

You judge how much of that one region has active eczema, not how much of the whole body.1

A rough estimate by eye is all EASI needs, and slower methods such as counting palm-sized patches are generally not needed.1 If you want a check, the patient's flat palm with fingers is about 1% of their whole body.10 In adults the hand is a little smaller than that, about 13% below 1%, and in children it is a little larger.10 In a patient 8 or older the head and neck is about 10% of the body, so one palm-sized patch there fills roughly 10% of that region. In a child under 8 the head and neck is about 20% of the body, so the same patch fills roughly 5%.

Some find it easier to split a region into parts first, such as the face, scalp and neck for the head and neck.2

What do you do when eczema looks different in spots inside the same region?

Grade the average across all the eczema in that region, not the worst patch.1

So if one arm has bright red skin (3) and the other has faint pink (1), the erythema score is about 2. Skip normal, clear skin when you average. You only rate the areas that have eczema.2

How often should an EASI score be checked?

Score it at the first visit to set a baseline, then again at each follow-up.

Recheck at each follow-up visit while starting a new treatment. Lichenification is often the last sign to clear and can hold back the full response by weeks.2 In England, NICE guidance judges dupilumab at 16 weeks, when the EASI score should have fallen by at least 50% and the DLQI, a quality-of-life score, by at least 4 points.8 Always use the same scorer when you can, so the numbers compare well.2

Can a patient score their own EASI at home?

No. EASI is meant for a trained health professional who examines the skin in person. Judging swelling (edema/papulation) and lichenification takes touch and practice.2

Patients can track their eczema with other tools made for self-reporting, like POEM (Patient-Oriented Eczema Measure) or a 0 to 10 itch scale. Doctors often pair those with EASI.

What is the mEASI score?

mEASI means modified EASI. It takes the normal EASI and adds a patient itch score, since plain EASI ignores itch.4

With the itch score added, the top score is 90 instead of 72.4

Why do doctors use EASI instead of just body surface area?

Body surface area (BSA) only tells you how much skin is affected. It says nothing about how bad the rash looks.

Two patients can both have 20% BSA, but one has faint pink skin and the other has cracked, thick, scratched-up skin. EASI blends area and severity, so those two get very different scores.2 That makes it better for tracking treatment.

Sources

  1. EASI guidance: how to use EASI. Harmonising Outcome Measures for Eczema (HOME). pp. 1-2, Appendix 3 and FAQ. Accessed September 26, 2026.
  2. Hanifin JM, Baghoomian W, Grinich E, Leshem YA, Jacobson M, Simpson EL. The Eczema Area and Severity Index—A Practical Guide. Dermatitis. 2022;33(3):187-192. doi:10.1097/DER.0000000000000895. Accessed September 26, 2026.
  3. Schram ME, Spuls PI, Leeflang MM, Lindeboom R, Bos JD, Schmitt J. EASI, (objective) SCORAD and POEM for atopic eczema: responsiveness and minimal clinically important difference. Allergy. 2012;67(1):99-106. doi:10.1111/j.1398-9995.2011.02719.x. Accessed September 26, 2026.
  4. Chopra R, Vakharia PP, Sacotte R, Patel N, Immaneni S, White T, et al. Severity strata for Eczema Area and Severity Index (EASI), modified EASI, Scoring Atopic Dermatitis (SCORAD), objective SCORAD, Atopic Dermatitis Severity Index and body surface area in adolescents and adults with atopic dermatitis. British Journal of Dermatology. 2017;177(5):1316-1321. doi:10.1111/bjd.15641. Accessed September 26, 2026.
  5. Oranje AP, Glazenburg EJ, Wolkerstorfer A, de Waard-van der Spek FB. Practical issues on interpretation of scoring atopic dermatitis: the SCORAD index, objective SCORAD and the three-item severity score. British Journal of Dermatology. 2007;157(4):645-648. doi:10.1111/j.1365-2133.2007.08112.x. Accessed September 26, 2026.
  6. DUPIXENT- dupilumab injection, solution. DailyMed, U.S. National Library of Medicine. section 14, Clinical Studies. Accessed September 26, 2026.
  7. Leshem YA, Hajar T, Hanifin JM, Simpson EL. What the Eczema Area and Severity Index score tells us about the severity of atopic dermatitis: an interpretability study. British Journal of Dermatology. 2015;172(5):1353-1357. doi:10.1111/bjd.13662. Accessed September 26, 2026.
  8. Dupilumab for treating moderate to severe atopic dermatitis (TA534). National Institute for Health and Care Excellence. 2018;Recommendations 1.1-1.2. Accessed October 7, 2026.
  9. Feldman SR, Krueger GG. Psoriasis assessment tools in clinical trials. Annals of the Rheumatic Diseases. 2005;64(Suppl 2):ii65-ii68, Table 1. doi:10.1136/ard.2004.031237. Accessed October 8, 2026.
  10. Rhodes J, Clay C, Phillips M. The surface area of the hand and the palm for estimating percentage of total body surface area: results of a meta-analysis. British Journal of Dermatology. 2013;169(1):76-84. doi:10.1111/bjd.12290. Accessed October 8, 2026.

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