NEWS2 Calculator — National Early Warning Score 2 (UK NHS Standard)

How to Use This Calculator

1. Enter respiratory rate, SpO2, whether supplemental oxygen is in use, temperature, systolic BP, heart rate, and consciousness level.
2. NEWS2 score, risk band, and monitoring response display instantly.
3. For COPD patients with confirmed hypercapnic respiratory failure, use the COPD Scale 2 tab.
4. Use the Risk Band Lookup tab to check escalation protocols for any given score.

Formula

Example

Frequently Asked Questions

• What is NEWS2 and why was it introduced? ▼
  NEWS2 (National Early Warning Score 2) is the current UK NHS standard physiological track-and-trigger system, published by the Royal College of Physicians in December 2017. It replaced the original NEWS (2012) with key updates: introduction of a second SpO2 scoring scale (Scale 2) for patients with confirmed hypercapnic respiratory failure such as COPD; replacement of the AVPU consciousness scale with ACVPU (adding Confusion as a clinical flag); and updated guidance on its use as a sepsis screening tool. NEWS2 scores seven parameters — respiratory rate, oxygen saturation, supplemental oxygen, temperature, systolic blood pressure, heart rate, and level of consciousness — each on a 0–3 scale. It has been shown to outperform MEWS, SIRS criteria, and qSOFA for predicting in-hospital deterioration across medical and surgical patients.
• What is the difference between NEWS2 Scale 1 and Scale 2? ▼
  The two SpO2 scoring scales in NEWS2 reflect different target oxygen saturation ranges. Scale 1 is used for the majority of patients and scores normal SpO2 (95–100%) as 0 points, with increasing points for lower saturations. Scale 2 is used exclusively for patients with confirmed hypercapnic respiratory failure — typically COPD — where the target SpO2 range is 88–92% rather than 95–100%. On Scale 2, saturations of 88–92% score 0 points; higher saturations (93–96%) score 1–2 points because hyperoxia can suppress hypoxic drive and worsen hypercapnia. Scale 2 must be explicitly prescribed by a doctor and documented in the patient notes — it should not be applied routinely without confirmed hypercapnic failure, as inappropriate use could delay treatment of deteriorating patients who genuinely need higher oxygen targets.
• What NEWS2 score triggers an emergency response? ▼
  The Royal College of Physicians NEWS2 clinical response thresholds are: Score 0 — minimum 12-hourly observations; Score 1–4 — minimum 4–6 hourly observations and ward-based nurse or doctor response; Score 5–6 (medium risk) or any single parameter scoring 3 — minimum 1-hourly observations and urgent review by a ward doctor or acute team; Score 7 or above (high risk) — continuous monitoring and immediate emergency response including a clinical team competent in managing acute illness. A NEWS2 of 5 or above in a patient with suspected infection should also trigger a Sepsis Six bundle assessment under the UK Sepsis Trust guidance. Local trust protocols may modify these thresholds slightly but should not exceed them.
• How was NEWS2 validated? ▼
  NEWS2 was developed from the original NEWS and validated in several large multicentre studies. The most important validation work is the Royal College of Physicians report using NHS data from multiple trusts. Smith et al. (2013) in Resuscitation showed that NEWS outperformed six other EWS systems in predicting cardiac arrest, unanticipated ICU admission, and 30-day mortality across 35,585 patients. Subsequent studies specifically validated NEWS2 modifications. A large Swe- dish study by Ljunggren et al. confirmed strong discrimination for in-hospital deterioration. A comparison by Jarvis et al. (2019) in Emergency Medicine Journal showed NEWS2 performed comparably to or better than original NEWS across emergency department cohorts. The evidence base is substantially stronger than for MEWS or most other early warning systems.
• Can NEWS2 be used to screen for sepsis? ▼
  NEWS2 has been incorporated into sepsis identification pathways in England. The UK Sepsis Trust and NHS England recommend using NEWS2 as a screening trigger: a score of 5 or above in a patient with suspected or confirmed infection should prompt immediate Sepsis Six actions (including blood cultures, broad-spectrum antibiotics, and intravenous fluid assessment). NEWS2 was shown in the RCEM audit (2019) and subsequent studies to have good sensitivity for identifying patients who meet Sepsis-3 criteria. However, NEWS2 alone is not a sepsis diagnostic tool — the Sepsis-3 definition requires clinical assessment for suspected infection plus organ dysfunction. NEWS2 provides the trigger to investigate further, not a definitive diagnosis. The ACVPU consciousness component (including Confusion) is particularly important for sepsis detection, as new confusion is a key early sepsis sign.

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