International Prostate Symptom Score Calculator

The seven-item IPSS, scored 0 to 35, with the quality-of-life item reported beside the total rather than added to it, and the voiding and storage subscores. This is the prostate symptom score, not the prognostic scoring system.

Last updated 8 Oct 2026

International Prostate Symptom Score

7 items 0–5 → 0–35, plus a separate QoL item

1. Incomplete emptyingOver the past month, how often have you had a sensation of not emptying your bladder completely after you finished urinating? A voiding item. It scores a sensation, not a measured residual: a man can feel he has not emptied and have 20 mL left, or empty to 300 mL and feel nothing.

2. FrequencyOver the past month, how often have you had to urinate again less than two hours after you finished urinating? A storage item, and the one fluid intake moves most: four litres a day scores here with no prostate involved.

3. IntermittencyOver the past month, how often have you found you stopped and started again several times when you urinated? A voiding item.

4. UrgencyOver the past month, how often have you found it difficult to postpone urination? A storage item. The published wording asks about DIFFICULTY postponing, not about leaking: the instrument never asks about incontinence, which the EAU lists among its limitations.

5. Weak streamOver the past month, how often have you had a weak urinary stream? A voiding item, and the one most often assumed to track the measured flow rate. It does not reliably.

6. StrainingOver the past month, how often have you had to push or strain to begin urination? A voiding item.

7. NocturiaOver the past month, how many times did you most typically get up to urinate from the time you went to bed until the time you got up in the morning? A storage item, and THE ITEM WITH ITS OWN RESPONSE SCALE: it asks for a count, so the options run from none to five or more rather than using the frequency wording of the other six.

8. Quality of life (NOT part of the total)If you were to spend the rest of your life with your urinary condition just the way it is now, how would you feel about it? THIS ITEM IS NOT ADDED TO THE SYMPTOM TOTAL. It is scored 0 to 6, not 0 to 5, and adding it would turn a maximum of 35 into 41 and shift a patient’s severity band. It is reported separately below the total, where the published form puts it, and it is often the item that decides whether a man wants anything done.

11pointsExample

Incomplete emptying 1, frequency 2, intermittency 1, urgency 1, weak stream 3, straining 1, nocturia 2, and a quality-of-life answer of 3 (mixed)

Scoring, and the two things that go wrong

IPSS = item 1 + item 2 + item 3 + item 4 + item 5 + item 6 + item 7, each 0 to 5 → 0 to 35
0–7 mild · 8–19 moderate · 20–35 severe
Voiding subscore = items 1 + 3 + 5 + 6 (0 to 20) · Storage subscore = items 2 + 4 + 7 (0 to 15)
The quality-of-life item is NOT in the total.

which IPSS this is: Two different instruments are abbreviated IPSS. This is the International Prostate Symptom Score, for lower urinary tract symptoms. It is not the International Prognostic Scoring System, which stratifies myelodysplastic syndrome.
the ratio row disappears on a pure voiding pattern: the ratio is a division, so a storage subscore of zero leaves it undefined and the row is dropped rather than shown as an infinity. Read the two subscores above instead
the quality-of-life item is separate: it is scored 0 to 6 while the seven symptom items are scored 0 to 5, so a page that sums all eight reports a maximum of 41 and moves men across severity bands. This is the commonest implementation error on this instrument and the reason the item is labelled on the form above as not part of the total
it is a symptom score, not a diagnostic test: in 229 men with both an IPSS and an MRI prostate volume, the correlation between the two was r = 0.12789 (P = 0.05) — mean score 9.77, mean volume 55.88 cc — and absent above 40 cc and on stratification by race and by PSA. The EAU adds that symptom scores are not disease- or age-specific
what the instrument does not ask: the EAU lists three gaps: incontinence, post-micturition symptoms, and how much each separate symptom bothers the man
licensing and attribution: The International Prostate Symptom Score reproduced here is the American Urological Association Symptom Index with the quality-of-life item added. The AUA’s own Help Center states that it is open access and that no further permission is needed to use it, and asks that any adaptation be noted as adapted from the AUA; this page reproduces the seven items and the quality-of-life item unchanged. The instrument descends from the AUA Measurement Committee’s 1992 Journal of Urology publication, which both the AUA and the PhenX Toolkit name as its source; the IPSS adds the quality-of-life item and was adopted by the World Health Organization. Translations are sold through Mapi Research Trust for a fee, so a translated form is not covered by the open-access position

Worked example

Incomplete emptying 1, frequency 2, intermittency 1, urgency 1, weak stream 3, straining 1, nocturia 2, and a quality-of-life answer of 3 (mixed)
1 + 2 + 1 + 1 + 3 + 1 + 2 = 11 points
11 sits in the 8–19 moderate band
Voiding subscore = 1 + 1 + 3 + 1 = 6 of 20; storage subscore = 2 + 1 + 2 = 5 of 15; ratio 1.20
The quality-of-life answer of 3 is reported on its own and is not added: 11 + 3 = 14 moves this man no bands, but the same addition moves a man on 18 into the severe band, and a page summing all eight items reports a maximum of 41
Note where the total came from: the weak-stream item supplied 3 of the 11 points on its own, and that item does not reliably track a measured flow rate

The seven items, the response scale and the subscore each belongs to

Six items share one response scale (not at all, less than 1 time in 5, less than half the time, about half the time, more than half the time, almost always). The nocturia item has its own: none, 1, 2, 3, 4, 5 or more. The eighth is scored from delighted to terrible and reported separately, where the published form puts it. The voiding/storage split is items 1, 3, 5 and 6 against 2, 4 and 7, read off the Tzu Chi Medical Journal paper that names the question numbers; the EAU-affiliated summary of the pooled tadalafil analysis gives the same counts without the numbering.
Item	What it asks about	Subscore	Scored
1. Incomplete emptying	Sensation of residual urine	Voiding	0–5, frequency scale
2. Frequency	Voiding again within two hours	Storage	0–5, frequency scale
3. Intermittency	Stream stopping and starting	Voiding	0–5, frequency scale
4. Urgency	Difficulty postponing urination	Storage	0–5, frequency scale
5. Weak stream	Stream strength	Voiding	0–5, frequency scale
6. Straining	Pushing to begin	Voiding	0–5, frequency scale
7. Nocturia	Number of times up at night	Storage	0–5, its own count scale
8. Quality of life	Feeling about living with it as it is	Neither — not in the total	0–6

What the number predicts, and what it does not

These figures decide how the number should be read. The score measures how much a man is bothered; it measures neither his prostate nor his outlet. That is not a flaw in the instrument, it is what a symptom score is.
Question asked of the score	Published answer	Cohort
Does it track prostate size?	r = 0.12789 (P = 0.05), and no association in glands above 40 cc	229 men with an IPSS and an MRI volume
Does it identify bladder outlet obstruction?	The EAU cites a systematic review in which symptoms and questionnaires were not significantly associated with one another for diagnosing obstruction	Systematic review, cohorts not pooled
Do the subscores add anything?	A ratio above 1 was associated with outlet-related dysfunction in 81.2 per cent; a ratio of 1 with bladder-related dysfunction in 75.7 per cent	253 men, video urodynamics
Does combining it with size and flow help?	A volume of 30 mL with a Qmax of 10 mL/s gave a positive predictive value of 68.8 per cent (negative 53.5); a voiding-to-storage ratio above 1 raised it to 91.4 per cent, and above 2 to 97.3 per cent	Jiang et al., in the same review

A bother score that is routinely read as a measurement

The International Prostate Symptom Score is the American Urological Association Symptom Index — seven questions published by the AUA’s Measurement Committee in 1992 — with one quality-of-life question added. It is the most widely used instrument in lower urinary tract symptoms, and it is the subject of two persistent misunderstandings.

The first is arithmetic. The quality-of-life item is scored 0 to 6 and is not part of the 0 to 35 total. Summing all eight items produces a maximum of 41 and silently moves men across the severity bands, and it is the error this page is built to make impossible: the item is labelled on the form, excluded from the expression and reported separately below the total. The second is interpretive. A high score is read as evidence of a large prostate or of obstruction, and it is neither. In 229 men who had both an IPSS and an MRI prostate volume, the correlation between the two was r = 0.12789 — with a mean score of 9.77 and a mean volume of 55.88 cc — and the association was absent in glands above 40 cc. For obstruction the EAU cites a systematic review in which individual symptoms and questionnaires were not significantly associated with one another for making that diagnosis at all. The only instrument that measures obstruction is a pressure-flow study, and its two closed-form indices are a separate page.

What the score does well is split into subscores that carry information the total does not. Items 1, 3, 5 and 6 are voiding symptoms, items 2, 4 and 7 storage symptoms, and in a video-urodynamic series of 253 men the ratio between them separated outlet-related from bladder-related dysfunction better than the total, either subscore alone, the flow rate, the residual volume or the prostate volume.

Three practical points. The nocturia item has its own response scale because it asks for a count, and at least one form in circulation prints the frequency options against it, turning a nocturia of six into ‘almost always’ rather than a 5. The instrument asks nothing about incontinence, nothing about post-micturition symptoms and nothing about per-symptom bother — the EAU’s own list of its limitations. And the quality-of-life answer is often what matters: two men on 6 who answer ‘pleased’ and ‘terrible’ are in the same band and different situations.

Frequently asked questions

Is the quality-of-life question part of the IPSS total?

No. The total is the seven symptom items only, 0 to 35. The quality-of-life item is scored 0 to 6 and reported separately, under the total on this page. Adding it gives a maximum of 41 and moves men between bands, and it is the commonest error in reimplementations of the score.

What is the difference between the IPSS and the AUA Symptom Index?

The first seven questions are identical. The IPSS is the AUA Symptom Index with the quality-of-life question added, and is the version used internationally and adopted by the World Health Organization. LOINC lists them separately — 80883-2 for the AUA-SI, 80976-4 for the nine-member IPSS panel — with the same seven item codes inside both.

Is the IPSS copyrighted? Can I reproduce it?

The American Urological Association’s own Help Center article on the AUA Symptom Score states that it is open access, that no further permission is needed to use it, and asks only that any adaptation be noted as adapted from the AUA. The PhenX Toolkit records the same instrument as ‘freely available; permission not required for use’, and notes separately that translations are sold through Mapi Research Trust for a fee. LOINC’s entries carry no third-party copyright notice and no ‘used with permission’ flag.

Does a high IPSS mean the prostate is enlarged, or obstructed?

No to both, on the published data. Against MRI prostate volume in 229 men the correlation was r = 0.12789, and absent above 40 cc. For obstruction the EAU cites a systematic review finding symptoms and questionnaires not significantly associated with the diagnosis. Volume comes from ultrasound dimensions; obstruction from a pressure-flow study.

Which IPSS is this?

Two different instruments are abbreviated IPSS. This is the International Prostate Symptom Score, for lower urinary tract symptoms. It is not the International Prognostic Scoring System, which stratifies myelodysplastic syndrome. The two share nothing but an abbreviation, which is why this page’s address spells the instrument out.

What this page will not tell me

Every threshold, range and performance figure on this page is the published figure from the source named beside it, and each one depends on the population, the method and the equipment it was derived in. Where your own report, laboratory or local guideline gives a different figure, that figure governs. A score, an index, a measured volume or an attenuation value is not a diagnosis, and a proportion measured in a cohort is not a probability for one patient. This page reports a figure and what the published sources attach to it. It does not make a clinical decision and cannot.

Related calculators

References

American Urological Association. Guidelines — AUA Symptom Score (AUA-SI) or IPSS. AUA Help Center article 6909729784471, helpdesk.auanet.org (page shown as updated 4 March 2026): “The IPSS is open access so you may use it and no further permission is needed.”
PhenX Toolkit. Prostate Symptoms — Protocol 101202, Reproductive Health domain. RTI International: “This protocol is freely available; permission not required for use.”
Regenstrief Institute. LOINC 80976-4, International Prostate Symptom Score [IPSS] (panel of nine members); LOINC 80883-2, American Urological Association Symptom Index [AUASI]. loinc.org.
Inova Loudoun Hospital Radiation Oncology. International Prostate Symptom Score (I-PSS) form — item stems, response columns, the nocturia row, the quality-of-life item and the banding.
Healthwise. American Urological Association Symptom Index, patient health library entry (University of Michigan Health, ug1952) — a second independent reproduction of the items and bands.
European Association of Urology. Guidelines on the Management of Non-neurogenic Male Lower Urinary Tract Symptoms, 2026 edition — Diagnostic Evaluation. uroweb.org.
Lower urinary tract symptoms and bladder dysfunction: the IPSS voiding and storage subscores and their ratio. Tzu Chi Med J. 2014;26(2):61–63 — read for the question numbering of each subscore and for the Liao and Jiang figures.
Prostate volume measured by magnetic resonance imaging is not a predictor of lower urinary tract symptoms. J Family Med Prim Care. 2019 Jan.

Not medical advice. For healthcare professionals and education. Reference intervals vary by laboratory and assay — always use your own laboratory's. Never base a dose or a treatment decision on this page alone. Full disclaimer at calcengines.com/disclaimer/