Kitchen Range Hood CFM Calculator
Extractor fan airflow from hob output or kitchen volume.
Compare Your Options And Get Clear Answers
Extractor fan airflow from hob output or kitchen volume.
Kitchen Range Hood CFM Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Kitchen Quick Guide
Typical values for reference.
| Hob output (BTU/h) | Kitchen volume (m3) | Air changes per hour | Recommended airflow |
|---|---|---|---|
| 40000 | 50 | 10 | 400 CFM |
| 60000 | 70 | 12 | 600 CFM |
| 20000 | 30 | 8 | 200 CFM |
| 80000 | 100 | 15 | 884 CFM |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Kitchen Range Hood Calculator FAQ
Answers to common questions about this calculator.
It uses the formula shown with your inputs. Real conditions vary, so treat it as a guide.
CFM = max(BTU/100, volume x ACH x 0.589)
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.
Yes. Replace each input with your own figures and the result updates instantly.