Emergency Medicine · ICU and Critical Care · Internal Medicine

NEWS2 calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Respiratory rate

/min

Allowed range: 0–60 /min

SpO₂ (Scale 1)

Allowed range: 50–100 %

SpO₂ scale

Use Scale 1 unless a qualified clinician has directed Scale 2. Scale 2 is only for patients with diagnosed hypercapnic respiratory failure (e.g. known COPD) who have a prescribed target saturation range of 88–92%.

Supplemental oxygen

Systolic blood pressure

mmHg

Allowed range: 40–300 mmHg

Pulse

/min

Allowed range: 20–250 /min

New confusion or altered consciousness (CVPU)

Temperature

°F

Allowed range: 86–113 °F

Result

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Clinical inputs

Respiratory rate (/min)Accepted range: 0 to 60
SpO₂ (Scale 1) (%)Accepted range: 50 to 100
SpO₂ scale
Supplemental oxygen
Systolic blood pressure (mmHg)Accepted range: 40 to 300
Pulse (/min)Accepted range: 20 to 250
New confusion or altered consciousness (CVPU)
Temperature (°C)Accepted range: 30 to 45

Primary source

Royal College of Physicians. National Early Warning Score (NEWS) 2 (2017)

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