Air Filter Size Calculator

Estimate filter face area and airflow capacity.

Filter width (in)

Filter height (in)

Number of filters

Design face velocity (ft/min)

How to use this calculator

Enter your measurements, product coverage and pricing where requested. Results update instantly as values change.

Airflow capacity = total filter face area × face velocity.

Use the exact nominal filter size specified by your HVAC equipment and avoid excessive restriction.

Yes. Round purchase quantities up to whole packages, rolls, pieces or containers and verify coverage with the product manufacturer.