This page converts cubic meters per second into cubic feet per second using the factor 35.31466672, and shows the reverse figure alongside it. Both units measure volumetric flow, which is why one number does the whole job.
The SI unit of volumetric flow, used for rivers and large ducts. The cusec — how American river gauges and water rights report flow.
Standard versus actual volume. Gas flow in CFM depends on pressure and temperature, which is why compressor ratings say SCFM and specify the reference conditions. Converting the number is exact; comparing two ratings measured at different conditions is not. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in cubic feet per second, so you can sanity-check whether your answer is a plausible size.
The formula
cubic meters per second- The amount you are converting, in cubic meters per second
35.3146667215- The exact number of cubic feet per second in one cubic meter per second
cubic feet per second- The converted result
How it works, step by step
- Enter the value in cubic meters per second.
- It is multiplied by 35.3146667215, the exact factor between the two units.
- The answer is shown in cubic feet per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A shower head: 0.00016 m³/s in cubic feet per second
Take a shower head, roughly 0.00016 m³/s. The conversion is a single multiplication — 0.00016 × 35.3147 — giving 0.00565035 cfs. Because the relationship is proportional, doubling the input doubles the answer to 0.0113007 cfs.
A garden hose: 0.0003 m³/s in cubic feet per second
At 0.0003 m³/s (a garden hose), the same quantity in cubic feet per second is 0.0003 × 35.3147 = 0.0105944 cfs. One cubic meter per second is 35.3147 cubic feet per second, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many cubic feet per second are in one cubic meter per second?
Exactly 35.3146667215. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert cubic meters per second to cubic feet per second?
cubic feet per second = cubic meters per second × 35.3146667215. Reversed, cubic meters per second = cubic feet per second ÷ 35.3146667215, which is the same as multiplying by 0.028316846592.
Which is the bigger unit, the cubic meter per second or the cubic foot per second?
The cubic meter per second. One cubic meter per second equals 35.3147 cubic feet per second.
What does this quantity actually measure?
Both units measure volumetric flow. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a cubic meter per second?
The SI unit of volumetric flow, used for rivers and large ducts.
What is a cubic foot per second?
The cusec — how American river gauges and water rights report flow.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do m³/s to cfs in my head?
Plenty of people do this in their head: multiply by 35 instead of using the exact factor 35.31466672. At 100 that shortcut gives 3500 cubic feet per second, off by 31.47 cubic feet per second or about 0.89%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Cubic Meters Per Second to cubic feet per second reference tables
| Cubic Meters Per Second | Cubic Feet Per Second |
|---|---|
| 0.5 m³/s | 17.6573 cfs |
| 1 m³/s | 35.3147 cfs |
| 2 m³/s | 70.6293 cfs |
| 3 m³/s | 105.944 cfs |
| 5 m³/s | 176.573 cfs |
| 10 m³/s | 353.147 cfs |
| 20 m³/s | 706.293 cfs |
| 25 m³/s | 882.867 cfs |
| 50 m³/s | 1765.73 cfs |
| 75 m³/s | 2648.6 cfs |
| 100 m³/s | 3531.47 cfs |
| 250 m³/s | 8828.67 cfs |
| 500 m³/s | 17,657.3 cfs |
| 1000 m³/s | 35,314.7 cfs |
| 5000 m³/s | 176,573 cfs |
Exact factor: 1 cubic meter per second = 35.3146667215 cubic feet per second.
| Quantity | m³/s | cfs |
|---|---|---|
| A dripping tap | 1e-07 m³/s | 3.531e-06 cfs |
| A bathroom tap | 0.0001 m³/s | 0.003531 cfs |
| A shower head | 0.00016 m³/s | 0.00565 cfs |
| A garden hose | 0.0003 m³/s | 0.01059 cfs |
| A fire hydrant | 0.06 m³/s | 2.119 cfs |
| The Thames at London | 65 m³/s | 2295 cfs |
Published reference values, converted with the same factor this page uses.