Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Mass Flow Rate to Volume Flow Rate Converter
m³/s = (kg/s) ÷ (kg/m³).
Q = ṁ / ρ. Water near 1,000 kg/m³: 1 kg/s is 1 L/s. Air at 1.2 kg/m³ needs a much larger duct for the same kilograms. Compressible flow at high Mach is not this equation.
Mass flow
kg/s → m³/s
0.001 m³/s
Water is about 1,000 kg/m³. Air at room temperature is closer to 1.2.
- Mass flow
- 1 kg/s
- Density
- 1,000 kg/m³
- Liters per second
- 1
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Mass flow
The “Mass flow” value used in this tool’s formula. Adjust it to see results update live.
Density (kg/m³)
The “Density (kg/m³)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Q = ṁ / ρ. Water near 1,000 kg/m³: 1 kg/s is 1 L/s. Air at 1.2 kg/m³ needs a much larger duct for the same kilograms. Compressible flow at high Mach is not this equation. m³/s = (kg/s) ÷ (kg/m³). Example: 1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
m³/s = (kg/s) ÷ (kg/m³).
Example: 1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
When to use this Mass Flow to Volume Flow
Common use cases
- Q = ṁ / ρ. Water near 1,000 kg/m³: 1 kg/s is 1 L/s. Air at 1.2 kg/m³ needs a much larger duct for the same kilograms. Compressible flow at high Mach is not this equation.
- Sanity-check with this case: 1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
- The relationship is: m³/s = (kg/s) ÷ (kg/m³).
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Mass flow, Density (kg/m³)
- m³/s = (kg/s) ÷ (kg/m³).
- Example on the page: 1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
How to Convert Mass Flow to Volume Flow Step-by-Step
- 1Enter Mass flow, Density (kg/m³). Use the values you have, not a catalog average, unless that is all you know.
- 2m³/s = (kg/s) ÷ (kg/m³).
- 3Worked case: 1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
m³/s = (kg/s) ÷ (kg/m³).
1 kg/s of water → 0.001 m³/s (1 L/s). 1 kg/s of air at 1.2 kg/m³ → 0.83 m³/s.
Example: set Mass flow = 1, Density (kg/m³) = 1,000, then read the result.
Variable definitions
- value
Mass flow
The “Mass flow” field. Default 1; typical range 0–1000.
- density
Density (kg/m³)
The “Density (kg/m³)” field. Default 1000; typical range 0.1–20000.
- The conversion (m³/s = (kg/s) ÷ (kg/m³).) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Convert m³/s to liters, then to US gallons (÷ 3.785 per liter-minute).
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- GPM to L/min1 US gpm = 3.785 L/min. A 2.5 gpm showerhead is 9.5 L/min. UK gallons are larger. Fixture laws care about the number on the aerator, not the pipe diameter.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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