Use actual duct area for final balancing.
Airflow Velocity Calculator LPM
Convert LPM airflow into approximate duct velocity for ventilation checks.
Room size and air changes set the airflow target.
The duct is treated as a round duct using the entered internal diameter.
Airflow Velocity Calculator LPM Formula
The duct is treated as a round duct using the entered internal diameter.
How the Airflow Velocity Calculator LPM Works
Enter the required inputs: Airflow, Round Duct Diameter.
The calculator applies: air velocity = (LPM / 60000) / duct area.
The result updates instantly in m/s.
Use the displayed assumption before applying the result to engineering work.
Airflow Velocity Calculator LPM Conversion Table
| Airflow (LPM) | m/s |
|---|---|
| 100 | 0.212 |
| 250 | 0.531 |
| 500 | 1.061 |
| 1000 | 2.122 |
| 2500 | 5.305 |
| 5000 | 10.610 |
Where Airflow Velocity Calculator LPM is Used
What is Airflow Velocity Calculator LPM?
The airflow velocity calculator uses airflow, round duct diameter to calculate air velocity. It is designed for fast comparison work across pumps, plumbing, gas flow, HVAC, and industrial systems.
Example: 500 LPM = 1.061 m/s
Questions About Airflow Velocity Calculator LPM
What does the airflow velocity calculator calculate?
It converts the entered value into m/s using the formula and assumptions shown on the page.
What assumption is used for this airflow velocity calculator?
It assumes a 100 mm round duct area.
Where is the airflow velocity calculator used?
It is used for ventilation balancing, duct checks, lab extraction, and fan performance estimates.
Is the airflow velocity calculator accurate for engineering design?
The math is useful for fast estimation, but engineering-critical work should be checked against manufacturer data, fluid properties, pipe geometry, temperature, pressure, and local standards.
Can I use the airflow velocity calculator for gases and liquids?
Use it only when the displayed assumptions match your medium and reference conditions. Gas, fuel, and pressure-drop calculations can change significantly with density, pressure, temperature, and system geometry.