Air velocity estimate

Airflow Velocity Calculator LPM

Convert LPM airflow into approximate duct velocity for ventilation checks.

Instant Results Engineering-Grade Precision Clear Assumptions
Airflow Velocity Calculator LPM LPM → m/s
LPM
Air Velocity 1.061 m/s
mm
Quick Picks for Airflow

Use actual duct area for final balancing.

Ventilation Air Exchange air velocity = (LPM / 60000) / duct area
LPM 500 Airflow
room volume x ACH
room airflow / duct area air changes
m/s 1.061 Air Velocity

Room size and air changes set the airflow target.

Result 500 LPM = 1.061 m/s

The duct is treated as a round duct using the entered internal diameter.

Formula

Airflow Velocity Calculator LPM Formula

Airflow 500 LPM Round Duct Diameter 100 mm
airflow / duct area
Air Velocity 1.061 m/s
air velocity = (LPM / 60000) / duct area

The duct is treated as a round duct using the entered internal diameter.

Guide

How the Airflow Velocity Calculator LPM Works

Input Airflow
Model airflow / duct area
Output 1.061 m/s
Decision Engineering Check
1

Enter the required inputs: Airflow, Round Duct Diameter.

2

The calculator applies: air velocity = (LPM / 60000) / duct area.

3

The result updates instantly in m/s.

4

Use the displayed assumption before applying the result to engineering work.

Reference

Airflow Velocity Calculator LPM Conversion Table

100 LPM 0.212 m/s
250 LPM 0.531 m/s
500 LPM 1.061 m/s
1000 LPM 2.122 m/s
2500 LPM 5.305 m/s
5000 LPM 10.610 m/s
Airflow (LPM) m/s
100 0.212
250 0.531
500 1.061
1000 2.122
2500 5.305
5000 10.610
Applications

Where Airflow Velocity Calculator LPM is Used

m/s Airflow Velocity Calculator LPM
Ventilation ducts Airflow balancing Lab extraction Fan performance checks
Ventilation ducts
Airflow balancing
Lab extraction
Fan performance checks
Explanation

What is Airflow Velocity Calculator LPM?

Inputs Airflow + Round Duct Diameter
Result Air Velocity

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

FAQ

Questions About Airflow Velocity Calculator LPM

Q1 What does the airflow velocity calculator calculate? Q2 What assumption is used for this airflow velocity calculator? Q3 Where is the airflow velocity calculator used? Q4 Is the airflow velocity calculator accurate for engineering design? Q5 Can I use the airflow velocity calculator for gases and liquids?
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.