Asthma Control Test (ACT) Calculator
Score the Asthma Control Test (ACT), a five-question self-assessment of how well your asthma has been controlled over the past four weeks. Rate each item from 1 to 5 and the calculator adds them up to a total out of 25, then tells you whether your asthma is well controlled, not well controlled, or poorly controlled.
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
- Screening questionnaire. Not a diagnosis.
Formula
Sum of 5 items, each scored 1–5 (total 5–25)
- Each of the five questions is scored from 1 (worst control) to 5 (best control), and the answers are added for a total between 5 and 25.
- A total of 20–25 indicates well-controlled asthma, 16–19 indicates asthma that is not well controlled, and 15 or below indicates poorly controlled asthma.
- The questions cover activity limitation, shortness of breath, night-time symptoms, rescue-inhaler use, and your own rating of control over the last four weeks.
- The ACT is a validated screening questionnaire, not a diagnosis. Discuss your score and any low result with your doctor or asthma nurse.
Example: all five items scored 3
Inputs
- Asthma kept you from getting work/home tasks done (1 all the time → 5 none of the time): 3
- How often short of breath (1 more than once/day → 5 not at all): 3
- Symptoms woke you at night (1 ≥4 nights/week → 5 not at all): 3
- Used rescue inhaler (1 ≥3×/day → 5 not at all): 3
- How would you rate your asthma control (1 not controlled → 5 completely controlled): 3
Scoring 3 on each of the five questions gives a total of 15 out of 25, which falls in the 'poorly controlled' band and suggests your asthma treatment should be reviewed.
Frequently asked questions
What is the Asthma Control Test (ACT)?
It is a short, validated five-question questionnaire that gauges how well your asthma has been controlled over the previous four weeks, giving a score out of 25.
What do the scores mean?
A total of 20–25 means your asthma is well controlled, 16–19 means it is not well controlled, and 15 or below means it is poorly controlled and warrants a treatment review.
How are the questions scored?
Each question is answered on a 1-to-5 scale where 1 reflects the worst control and 5 the best, and the five answers are summed for the total.
How often should I take the test?
Many clinicians suggest repeating it at each review or if your symptoms change, so you can track whether your control is improving or worsening over time.
Is the ACT a diagnosis?
No. It is a screening and monitoring tool. A low score is a prompt to speak with your healthcare provider, who will assess you fully and adjust treatment if needed.
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