NEWS2 Score Calculator

National Early Warning Score 2 from vital signs, SpO₂ scale, and supplemental oxygen status.

Written by

Sid A. Abdala Balal

RGN · Medical & Nursing Content Author

Medically reviewed by

Dr. Adam Sayedi

MD · Emergency & Acute Medicine

Understanding this tool

Why nurses use it

NEWS2 is the standard adult early warning score in many UK and international hospitals. It helps nurses recognise deterioration early and triggers escalation when physiology deviates from normal.

When to use it

Use for routine adult vital sign sets per local policy — especially ward, AMU, and emergency settings. Select SpO₂ Scale 2 only when hypercapnic respiratory failure is documented and the prescribed target is 88–92%; otherwise use Scale 1.

Calculate

How to use this calculator

Select SpO₂ Scale 1 (standard) or Scale 2 (documented hypercapnic respiratory failure with 88–92% target).
Enter each physiological parameter from the latest observations.
Indicate if the patient is on supplemental oxygen.
Sum the score and apply your local escalation threshold.
Re-score with each observation round or when the patient deteriorates.

How the calculation works

Each parameter (RR, SpO₂, BP, pulse, temperature, consciousness, oxygen) maps to points on the RCP NEWS2 chart. Scale 1 scores low saturations for most patients; Scale 2 uses an 88–92% target range and flags high saturations on supplemental oxygen. The total score reflects illness severity and triggers graded responses.

Sum of validated parameter scores per RCP NEWS2 chart

Formula used by this tool — verify units before applying at the bedside.

Worked example

Typical stable vitals often score 0–2; rising scores warrant escalation per local policy.

Limitations & clinical notes

SpO₂ Scale 2 is only for documented hypercapnic respiratory failure with a prescribed 88–92% target — use Scale 1 for all other patients.
The decision to use Scale 2 must be made and recorded by a competent clinician per RCP NEWS2 guidance.
Score triggers vary by hospital escalation policy.

References

Key sources: RCP — NEWS2.

Disclaimer: This calculator is for educational and bedside double-check purposes only. It does not replace institutional protocols, prescriber orders, pharmacist verification, or clinical judgment. Always follow your local policies — especially for high-risk medications, infusions, pediatrics, and critical care. If the patient is acutely unwell, escalate immediately rather than relying on any calculator output.