L/s to CFM Calculator
Convert litres per second to CFM.
Enter your values
Enter the airflow in L/s.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Airflow
- 63.6 CFM
- In m³/h
- 108
- In m³/min
- 1.8
- In L/min
- 1,800
Working
- 130 L/s x 2.11888 = 63.6 CFM
Quick answer
One litre per second equals 2.11888 CFM.
CFM = L/s x 2.11888
At a glance
| What it does | Convert litres per second to CFM. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Airflow |
| Main output | Airflow |
| Formula | CFM = L/s x 2.11888 |
| Cost | Free — no sign-up, no download |
How to use the L/s to CFM Calculator
- 1Enter the airflow in litres per second.
- 2Read the CFM equivalent for US-rated fans.
- 3Compare m³/h if your ducting is metric.
Inputs explained
- Airflow(L/s)
- Enter the airflow in L/s.
Worked example
Using the values the calculator loads with:
Inputs
- Airflow30 L/s
Results
- Airflow63.6 CFM
- In m³/h108
- In m³/min1.8
- In L/min1,800
- 30 L/s x 2.11888 = 63.6 CFM
Frequently asked questions
Is L/s a volume or mass rate?
It is a volume rate, so it shifts slightly with air density at altitude or high temperature.
How many L/s per person is typical?
Office standards commonly ask for 8–10 L/s per occupant.
What do I need to enter into the L/s to CFM Calculator?
Just 1 value: airflow. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the L/s to CFM Calculator work out the answer?
One litre per second equals 2.11888 CFM. It applies the formula CFM = L/s x 2.11888 and shows the working so you can check each step by hand.
Is the L/s to CFM Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.