Calculator Input Form
Use the responsive form below. It shows three columns on large screens, two on smaller screens, and one on mobile.
Example Data Table
This sample table shows how different symptom patterns can change the result.
| Profile | Day Symptoms | Night Waking | Reliever Use | Activity | Peak Flow % | Exacerbations | Total Score | Band |
|---|---|---|---|---|---|---|---|---|
| Example A | 1 day/week | 0 nights/week | 1 day/week | No limitation | 92% | 0 | 91 | Well Controlled |
| Example B | 4 days/week | 2 nights/week | 4 days/week | Mild limitation | 72% | 1 | 62 | Partly Controlled |
| Example C | 7 days/week | 5 nights/week | 7 days/week | Severe limitation | 45% | 3 | 0 | Poorly Controlled |
Formula Used
This calculator uses a custom weighted educational model. Better control earns more points. The total score ranges from 0 to 100.
Total Score = Daytime Symptoms + Night Waking + Reliever Use + Activity Limitation + Peak Flow + Exacerbation History
Maximum = 25 + 20 + 20 + 15 + 15 + 5 = 100
Subscore Weights
- Daytime symptoms: 0 to 25 points.
- Night waking: 0 to 20 points.
- Reliever use: 0 to 20 points.
- Activity limitation: 0 to 15 points.
- Peak flow percentage: 0 to 15 points.
- Exacerbation history: 0 to 5 points.
Band Rules
- 80 to 100: Well Controlled
- 60 to 79: Partly Controlled
- 0 to 59: Poorly Controlled
This weighting is designed for practical tracking and education. It is intentionally simple, transparent, and easy to explain to users.
How to Use This Calculator
- Enter the patient age and the assessment date.
- Record weekly daytime symptom days and night waking frequency.
- Enter how many days a reliever inhaler was used.
- Select the level of activity limitation caused by asthma.
- Add the peak flow percentage using personal best or predicted reference.
- Enter flare-ups from the last 12 months.
- Optionally add adherence, trigger exposure, and notes.
- Press Calculate Score to show the result above the form.
- Review the charts, score breakdown, and interpretation.
- Use the CSV or PDF buttons to save the report.
Frequently Asked Questions
1. Is this an official asthma diagnosis tool?
No. This calculator is a custom educational tracker. It helps organize symptoms, reliever use, peak flow context, and flare history into one understandable score.
2. Can I use predicted values instead of personal best for peak flow?
Yes. Use the most consistent reference available. Personal best is often practical for ongoing self-monitoring, while predicted values may help when personal best data is missing.
3. Why does a lower score mean worse control?
The model awards more points when symptoms are infrequent, activity is preserved, peak flow is higher, and flare history is limited. More problems reduce points.
4. Why include exacerbations from the last year?
Recent flare history adds future-risk context. A person may have acceptable daily symptoms but still carry higher risk because of repeated past exacerbations.
5. What does the trigger exposure score mean?
It is a practical support field. Use higher numbers when smoke, dust, pollen, infection, weather changes, pets, or exercise conditions were more intense recently.
6. Can this calculator track changes over time?
Yes. Repeat the same inputs regularly and compare total scores, domain charts, and notes. Trend tracking is often more useful than a single reading.
7. When should I avoid relying on this score alone?
If breathing feels suddenly worse, speech is difficult, lips look blue, or the person seems exhausted, rely on urgent medical care and the asthma action plan instead.
8. Why are adherence and notes not included directly in the score?
They help interpretation without making the score overly complex. This keeps the main formula transparent while still preserving useful clinical context.