NEWS2 Score Calculator
National Early Warning Score 2 from seven vital signs to flag a deteriorating patient.
What it does
The National Early Warning Score 2, or NEWS2, turns a set of routine observations into a single number that flags a patient who may be getting worse. It scores seven items, each from 0 to 3, and adds them up. Clinicians track the total over time so that a rising trend is noticed before a crisis.
The tool above scores respiration rate, oxygen saturation, systolic blood pressure, pulse, temperature, level of consciousness, and whether the patient is on supplemental oxygen. It returns the total, a risk band, the recommended response time, and whether any single item scored a red 3.
Two of the items carry special handling. Consciousness scores 3 when the patient is not alert, using the ACVPU scale that replaced older descriptions. Supplemental oxygen adds 2 points whenever it is in use, because needing oxygen is itself a warning sign.
Oxygen saturation uses one of two scales. Scale 1 targets the usual range and is right for most patients. Scale 2 targets 88 to 92 percent and is reserved for patients at risk of carbon dioxide retention, such as some people with chronic obstructive pulmonary disease, where a high saturation can be harmful.
A total of 7 or more calls for an urgent or emergency response, and 5 or 6 calls for an urgent response within the hour. A score of 3 in any single parameter is a red flag even when the total is low. NEWS2 is a track and trigger tool, so one reading matters less than how it changes over the next set of observations.
How to use
- Enter the respiration rate in breaths per minute.
- Enter the oxygen saturation and pick scale 1 or scale 2.
- Enter the systolic blood pressure and the pulse.
- Enter the temperature in degrees Celsius.
- Choose the consciousness level and whether the patient is on oxygen.
- Read the total, the risk band, and the response time.
Formula
- Respiration
- Scored 0 to 3 across five bands.
- Saturation
- Scored 0 to 3 on the chosen scale.
- Blood pressure
- Systolic value scored 0 to 3.
- Pulse
- Scored 0 to 3 across six bands.
- Temperature
- Scored 0 to 3.
- Consciousness
- 0 when alert, 3 when not.
- Oxygen
- 0 on air, 2 on supplemental oxygen.
Every parameter is scored from 0 to 3 and the maximum across the six measured items is 3. The oxygen item adds 2, so the highest possible total is 3 x 6 + 2 = 20. A single 3 in any parameter is treated as a red flag regardless of the total.
Worked example
Example: a moderately unwell patient
Respiration 22, saturation 94 percent on scale 1, systolic pressure 105, pulse 95, temperature 38.6 C, alert, on air.
- Respiration 22 scores 2.
- Saturation 94 on scale 1 scores 1.
- Systolic 105 scores 1.
- Pulse 95 scores 1.
- Temperature 38.6 scores 1.
- Consciousness alert scores 0, and on air adds 0.
- Total = 2 + 1 + 1 + 1 + 1 = 6, a medium risk needing assessment within 60 minutes.
Reference table
| Total | Risk | Response |
|---|---|---|
| 0 | Low | Routine monitoring |
| 1 to 4 | Low | Routine ward monitoring |
| 3 in one item | Low to medium | Ward review for the red parameter |
| 5 to 6 | Medium | Urgent response within 60 minutes |
| 7 or more | High | Urgent or emergency response within 30 minutes |
Limits
- Not validated for children, who need a paediatric early warning score.
- Not for use in pregnancy or in some specialty settings without local rules.
- A single reading says little without comparing with earlier observations.
- Trained staff still decide the response, and the tool does not diagnose.
Common mistakes
- Using scale 2 for a patient who should use scale 1.
- Forgetting the 2 points for supplemental oxygen.
- Missing a single red 3 because the total looks low.
- Recording saturation from a poor probe signal.
- Treating one score as final instead of tracking the trend.
Try it yourself
Quick checks. Answers sit tucked under each question.
All parameters normal, alert, on air?
Total 0, low risk, routine monitoring.
Saturation 90 percent on air, scale 2, other items normal?
Scale 2 scores 0 in the 88 to 92 range, so a low total if nothing else scores.
Severe case with many red items?
Totals of 7 or more need an urgent or emergency response within 30 minutes.
Questions
What is a normal NEWS2 score?
0 is ideal. Totals of 1 to 4 are low risk with routine monitoring.
What does a score of 3 mean?
A single parameter at 3 is a red flag and prompts a ward review even if the total is low.
Scale 1 or scale 2 saturation?
Scale 1 for most patients. Scale 2 for those at risk of carbon dioxide retention, whose target is 88 to 92 percent.
Why does oxygen add points?
Needing supplemental oxygen is a warning sign, so it adds 2 points whenever it is in use.
Can NEWS2 be used in children?
No. Children use a dedicated paediatric early warning score.
How often should it be repeated?
The frequency follows the total and local policy. Higher scores are repeated sooner.
Sources
- Royal College of Physicians: NEWS2 chart and scoring
- Royal College of Physicians: NEWS2 final report