Enter a value in any flow rate unit and instantly see the equivalent in m³/s, L/min, GPM, CFM and more.
| Unit | Value |
|---|
Flow rate specifications span plumbing (GPM on a pump), HVAC (CFM on a fan), industrial process design (m³/h on a pipeline) and lab work (L/min on a peristaltic pump). This tool lets you enter a value once and see it converted to every common flow rate unit at the same time.
Every flow rate unit converts through cubic meters per second (m³/s), the SI unit of volumetric flow rate. To convert from unit A to unit B:
All flow rate units here are linear multiples of m³/s, so every conversion is straightforward multiplication or division.
| Unit | Symbol | Value in m³/s |
|---|---|---|
| Cubic Meter per Second | m³/s | 1 |
| Cubic Meter per Hour | m³/h | 0.000277778 |
| Liter per Second | L/s | 0.001 |
| Liter per Minute | L/min | 0.0000166667 |
| Liter per Hour | L/h | 0.000000278 |
| US Gallon per Minute | GPM | 0.0000630902 |
| Cubic Foot per Minute | CFM | 0.0004719474 |
Note: GPM here refers to the US gallon per minute; the UK/imperial GPM is about 20% larger (based on the UK gallon) and is not included in this list to avoid ambiguity.
Example 1 — GPM to L/min
A pump rated at 10 GPM: 10 × 3.785411784 L ÷ 1 min ≈ 37.85 L/min.
Example 2 — CFM to L/s
An HVAC fan rated at 400 CFM: 400 × 0.028316846592 m³ ÷ 60 s × 1000 ≈ 188.8 L/s.
Example 3 — m³/h to L/min
A pipeline flow of 5 m³/h: 5,000 L ÷ 60 min ≈ 83.33 L/min.
Example 4 — L/min to GPM
A lab pump running at 50 L/min: 50 ÷ 3.785411784 ≈ 13.21 GPM.