The Liters Per Second To Cfm Converter provides instantaneous, scientifically verified calculations to convert between Liters per Second (L/s) and Cubic Feet per Minute (CFM). Calibrated against official NIST SP 811 and BIPM standards, this calculator ensures reliable floating-point accuracy for academic research, engineering designs, and everyday calculations.
Standard reference matrix translating benchmark values from Liters per Second (L/s) to Cubic Feet per Minute (CFM).
| Liters per Second (L/s) | Cubic Feet per Minute (CFM) |
|---|---|
| 0.5 L/s | 1.05944 CFM |
| 1 L/s | 2.11888 CFM |
| 2 L/s | 4.23776 CFM |
| 5 L/s | 10.5944 CFM |
| 10 L/s | 21.1888 CFM |
| 20 L/s | 42.3776 CFM |
| Liters per Second (L/s) | Cubic Feet per Minute (CFM) |
|---|---|
| 50 L/s | 105.944 CFM |
| 100 L/s | 211.888 CFM |
| 200 L/s | 423.776001 CFM |
| 500 L/s | 1059.440002 CFM |
| 1000 L/s | 2118.880003 CFM |
To convert volumetric flow rate from liters per second (L/s or LPS) to cubic feet per minute (CFM), multiply the L/s flow rate by 2.1188800032893. Conversely, to convert CFM back to liters per second, divide by 2.1188800032893 (or multiply by 0.4719474432). For example, a ventilation diffuser rated for 50 L/s delivers approximately 105.944 CFM of conditioned air into a room.
This conversion is essential when reconciling international mechanical blueprints, where European standards express ventilation in liters per second while North American equipment schedules specify CFM.
15 L/s).31.783 CFM).According to NIST SP 811 and ISO 80000-4 standards, the exact conversion incorporates both volume and time transformations:
This exact relationship ensures accuracy across large HVAC distribution systems and municipal piping networks. For hourly capacities, convert directly using our CFM to cubic meters per hour converter or evaluate liquid volumes with our liters to gallons converter.
A mechanical engineer designing a school ventilation system in Canada calculates a required outdoor air intake of 120 L/s. The specified US rooftop package unit has a damper rated in CFM. What is the required damper setting?
Q = 120 × 2.118880003 = 254.2656 CFM
The rooftop unit damper must be adjusted to supply at least 254.3 CFM of fresh air. Duct pressure drop can be checked with our inch of water column to PSIG converter.
A biological safety cabinet exhaust hood extracts air at a measured rate of 450 L/s. What is the exhaust capacity in CFM?
Q = 450 × 2.118880003 = 953.496 CFM
The fume exhaust fan must sustain approximately 953.5 CFM to maintain containment face velocity. Static pressure can be monitored using our kPa converter.
Subway stations and underground road tunnels utilize longitudinal impulse jet fans to control smoke during emergency fires. European tunnel safety standards (such as NFPA 502 and PIARC) specify tunnel purging air velocities in meters per second (convertible via our meters per second to feet per second converter), translating to total tunnel air movement of tens of thousands of liters per second (L/s).
American jet fan manufacturers rate aerodynamic thrust in Newtons (evaluable with our force and torque converter) and discharge volume in CFM. Applying the exact conversion factor of 2.1188800032893 ensures smoke containment velocity exceeds the critical velocity ($v_c$) to prevent toxic backlayering over passenger escape routes.
In addition to fire safety, normal ventilation operating profiles require continuous fresh air replacement to remove vehicle exhaust gases, diesel particulate matter, and brake dust. Mechanical engineers balance fan sound levels against aerodynamic efficiency, ensuring that ventilation noise inside underground stations conforms to municipal acoustic criteria.
Follow these five simple steps to execute instant, accurate conversions using our interactive client-side engine:
Input your numeric magnitude into the starting field above.
Confirm L/s is selected as your input unit.
Choose CFM as your required reporting unit.
View certified output updated in real time with 15-digit precision.
Click "Copy Result" to paste directly into documents or blueprints.
Unit conversion relies on dimensional analysis and proportionality. Multiplying an input value by the invariant conversion ratio scales the quantity to the destination unit while preserving the identical underlying physical magnitude.
Liters per Second (L/s).Cubic Feet per Minute (CFM).Apply the baseline conversion ratio to convert a single standard unit:
Scale by a factor of 10 for standard commercial retail calculations:
Compute larger magnitudes typical of industrial logistics and engineering:
Our calculation library in the Flow Rate & Fluid Mechanics category supports comprehensive unit varieties. Explore the units available for mutual conversion:
| Unit Name | Standard Symbol | Category | Metrology Type |
|---|---|---|---|
| Cubic Meters per Second | m³/s | Volumetric_flow | Standard |
| Cubic Meters per Minute | m³/min | Volumetric_flow | Standard |
| Cubic Meters per Hour | m³/h | Volumetric_flow | Standard |
| Liters per Second | L/s | Volumetric_flow | Standard |
| Liters per Minute | L/min | Volumetric_flow | Standard |
| Liters per Hour | L/h | Volumetric_flow | Standard |
| Milliliters per Second | mL/s | Volumetric_flow | Standard |
| Milliliters per Minute | mL/min | Volumetric_flow | Standard |
| Cubic Millimeters per Minute | mm³/min | Volumetric_flow | Standard |
| Cubic Feet per Minute | CFM | Volumetric_flow | Standard |
| Cubic Feet per Second | CFS | Volumetric_flow | Standard |
| Cubic Feet per Hour | CFH | Volumetric_flow | Standard |
| US Gallons per Day | gal/day (US) | Volumetric_flow | Standard |
| Imperial Gallons per Day | gal/day (UK) | Volumetric_flow | Standard |
| US Gallons per Minute | GPM (US) | Volumetric_flow | Standard |
| Imperial Gallons per Minute | GPM (UK) | Volumetric_flow | Standard |
Prevent calculation discrepancies by avoiding these frequent metrological errors:
Find clear, scientifically verified answers about conversion formulas, standard ratios, unit definitions, and calculation methods.