Kessler Psychological Distress Scale (K6) Screener

Introduction

Psychological distress is often broad rather than neat. One month may feel mainly tense and restless. Another may feel flat, effortful, and heavy. The Kessler Psychological Distress Scale, usually called the K6, was built to turn that recent burden into a short screening score by asking how often six feelings were present during the past 30 days.

This assessment keeps that core job intact. It scores the six answers on the familiar 0 to 24 scale, shows whether the total stays below 5, falls in the 5 to 12 watch range, or reaches the common 13+ serious-distress cutoff, and then adds reading aids such as the highest-scored item, the count of items rated Most of the time or All of the time, a threshold gauge, an item-frequency radar, and optional comparison with a previous total.

A short screen is useful because it is repeatable. It is also limited. The total tells you how much recent distress was reported on this measure. It does not identify the cause, it does not sort symptoms into a diagnosis, and it cannot tell you by itself whether the right next step is rest, closer monitoring, counseling, medical review, or urgent support.

The page keeps that context visible. You can switch between a screening snapshot, a follow-up check-in, and a discussion-prep lens, set a retest cadence from 14 to 60 days, and export the completed result as item-review CSV or DOCX files, chart images or chart CSV, and a structured JSON record. Routine scoring stays in the browser, but bookmarked result URLs and saved exports can still preserve sensitive mental-health information.

Technical Details:

The K6 was developed as a brief measure of non-specific psychological distress. Every item uses the same past-30-days recall period and the same five response options. On this page the answers are coded from 0 for None of the time to 4 for All of the time, then summed. That produces a raw total from 0 to 24.

The raw K6 total is the sum of the six item scores:

Here T is the total from 0 to 24, and each x value is one item score from 0 to 4.

The 13-point cutoff is the best-known K6 boundary for serious psychological distress in population screening. The lower 5-point watch range shown here comes from later validation work that linked scores from 5 to 12 with meaningful treatment need. It is not a diagnosis threshold. It is a practical sign that distress is no longer comfortably minimal on this short scale.

Those extras help you read the month more clearly, but they are not official K6 subscales. The validated core output is still the raw total and the pattern of the six answers.

Everyday Use & Decision Guide:

The most important practical choice comes before you click anything. Answer for the whole past 30 days, not for the single worst day and not for the last few hours. The K6 is short, so it is easy to let one recent spike dominate the answers. Doing that makes month-to-month comparison much less trustworthy.

Once the result appears, read it in layers. Start with the total and the band. Then check the strongest item and the number of high-intensity items. After that, use the focus table, gauge, and radar to see whether the burden looks broad or concentrated. That order keeps the interpretation tied to the actual score instead of letting the visuals take over.

The previous-total field is only worth using when the earlier score came from another complete K6 answered with the same 30-day frame. If the older number came from a different questionnaire, a shorter recall period, or a rough memory of how bad the month felt, leave it blank. A misleading comparison is worse than no comparison.

Treat privacy choices as part of normal use. Routine scoring and exports stay local, but copied CSV rows, DOCX files, chart downloads, JSON records, and bookmarked result links can all preserve sensitive details. If the material would feel too personal in an email attachment or shared browser history, handle those exports carefully.

Step-by-Step Guide:

1. Begin the assessment and keep every answer tied to the same past-30-days window.
2. Rate all six items from None of the time to All of the time using the 0 to 4 scale shown on the page.
3. Read the total score and band first so you know whether the month sits in the lower, elevated, or serious range on this tool.
4. Check the top driver, high-intensity count, and item table next so the strongest feelings are visible instead of hidden inside the total.
5. If you are monitoring change, enter a previous K6 total, choose the lens that fits your purpose, and set the retest cadence you want the page to use in its follow-up wording.
6. Use exports only after you understand the summary: item-review CSV or DOCX for the answer ledger, PNG or WebP or JPEG and CSV for the charts, or JSON when you want a structured record.

Interpreting Results:

A lower K6 total means the six distress feelings were reported less often during the month. A higher total means they were reported more often. That sounds simple because, at one level, it is. The harder part is understanding what a short score can and cannot settle.

The 5-point watch range and the 13-point serious-distress cutoff do different jobs. The lower range warns that distress is no longer comfortably minimal. The higher cutoff is the stronger public-health signal. If the page shows Elevated, that is not a reason to panic, but it is a reason to stop pretending the month was basically unchanged. If it shows Serious range, the result has moved beyond casual tracking.

The item pattern matters because totals can tie while lived experience differs. A score of 8 made up of several 1s and 2s feels different from a score of 8 driven mainly by one item at 4. That is why the page surfaces the top driver and the count of high-intensity items. Those cues do not replace the total, but they stop a concentrated problem from being lost inside the sum.

The previous-total comparison helps only when it is read with context. A one-point shift may be ordinary noise. A three-point rise that matches worse sleep, lower concentration, or shrinking daily activity is more meaningful. The retest cadence setting is a reminder for follow-up wording, not a rule that says support should wait until that date.

The best check on any score is still daily function. Ask whether distress is interfering with sleep, school, work, relationships, or the ability to handle ordinary tasks. If the score looks modest but life feels badly narrowed, treat that mismatch as important. If safety feels uncertain, use crisis or emergency support where you are instead of relying on another screen.

Worked Examples:

FAQ:

Glossary:

K6

A six-item Kessler screen for recent non-specific psychological distress over the past 30 days.

Raw total

The direct sum of the six item scores, ranging from 0 to 24 on this page.

Top driver

The highest-scored item, shown so one dominant feeling is easy to spot.

High-intensity item

Any item scored at 3 or 4, meaning Most of the time or All of the time.

Watch range

The 5 to 12 band used here to flag elevated distress below the better-known serious-distress cutoff.

Monitoring delta

The difference between the current K6 total and a previous K6 total entered for comparison.

References:

• Kessler RC, Andrews G, Colpe LJ, et al. Short screening scales to monitor population prevalences and trends in nonspecific psychological distress.
• Kessler RC, Barker PR, Colpe LJ, et al. Screening for serious mental illness in the general population.
• Prochaska JJ, Sung HY, Max W, Shi Y, Ong M. Validity study of the K6 scale as a measure of moderate mental distress based on mental health treatment need and utilization.
• PhenX Toolkit protocol for the K6, including past-30-days wording and 0 to 24 scoring guidance.