Working browser tool

Duct Diameter from Airflow Velocity

Convert volumetric flow and target velocity into a theoretical round-duct diameter.

Enter your values

Your inputs are processed locally. Review the method and limitations before relying on the estimate.

How does Duct Diameter from Airflow Velocity work?

Convert volumetric flow and target velocity into a theoretical round-duct diameter.

Worked example

With the suggested numbers, calculate the displayed quantities and replace them with your measured assumptions.

Frequently asked questions

Are values current market or legal rates?

No. All prices, rates and conditions are entered by you.

Is this a certified engineering or legal conclusion?

No. It is a transparent planning model; confirm high-consequence decisions independently.