MihsabaHow to use
Volumetric flow describes fluid volume per time; mass flow describes its mass per time. They are related by ṁ = ρQ after unit conversion. Enter L/min and density in kg/m³; the calculator converts litres and minutes to m³/s and returns kg/s, kg/min and kg/h. For example, 120 L/min at 1,000 kg/m³ gives 2 kg/s, 120 kg/min or 7,200 kg/h. Changing density changes mass flow even when volume flow stays fixed.
- Convert to L/min if needed: m³/h × 1000 ÷ 60 gives L/min.
- Enter nonnegative volumetric flow and positive density for its operating conditions.
- Calculate and review the displayed mass/time units.
How it is calculated
Example
120 L/min = 120 ÷ 60000 = 0.002 m³/s; multiplying by density 1,000 kg/m³ gives 2 kg/s. The minute and hour equivalents are 120 kg/min and 7,200 kg/h.
Important notes
Do not assume every litre equals one kilogram. That depends on entered density; 1,000 kg/m³ is a worked example. For actual or standard gas volumes, density and volume-flow conditions must match. The calculator does not automatically apply pressure or temperature corrections.
Worked examples and interpreting results
120 L/min = 120 ÷ 60000 = 0.002 m³/s; multiplying by density 1,000 kg/m³ gives 2 kg/s. The minute and hour equivalents are 120 kg/min and 7,200 kg/h.
| Case | Calculation | Result |
|---|---|---|
| Flow in kilograms per second | 120 ÷ 60000 × 1000 | 2 kg/s |
| Flow in kilograms per minute | 2 × 60 | 120 kg/min |
| Flow in kilograms per hour | 2 × 3600 | 7,200 kg/h |
How to check the result
Do not assume every litre equals one kilogram. That depends on entered density; 1,000 kg/m³ is a worked example. For actual or standard gas volumes, density and volume-flow conditions must match. The calculator does not automatically apply pressure or temperature corrections.
Frequently asked questions
How do I convert L/min to kg/min?
Multiply L/min by density in kg/m³ and divide by 1,000. For example, 10 L/min at 800 kg/m³ gives 8 kg/min.
Can I start from m³/h?
Convert it to L/min first by multiplying by 1,000 and dividing by 60. For example, 7.2 m³/h equals 120 L/min.
What happens when density doubles?
At fixed volumetric flow, mass flow doubles. A flow of 120 L/min at 500 kg/m³ gives 1 kg/s; at 1,000 kg/m³ it gives 2 kg/s.
Should I use standard gas density?
Use density at the conditions of the volume-flow measurement. A standard-volume reading needs density at its defined reference conditions; an actual-volume reading needs density at operating conditions.