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Volumetric Flow Rate

m³/daytocfs

Convert cubic metres per day (m³/day) to cubic feet per second (cfs).

Factor1 m³/day = 0.0004087346 cfs

Converter

m³/day

Accepts numbers or expressions, e.g. 150 + 14.7

Result
35.3147cfs

Rendered to 6 significant figures.

Formula

Formula
cfs = m³/day × 0.0004087346

Multiply any value in cubic metres per day by 0.0004087346 to obtain the value in cubic feet per second.

Worked example

Convert 86400 m³/day to cfs.

  1. 01Start with 86400 m³/day.
  2. 02Multiply by the conversion factor: 86400 × 0.0004087346 = 35.3147 cfs.
Result86400 m³/day = 35.3147 cfs

Conversion table

m³/daycfs
10.00040873
20.00081747
50.0020437
100.0040873
200.0081747
500.020437
1000.040873
2000.081747
5000.20437
10000.40873

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from m³/day to cfs?
1 m³/day equals 0.0004087346 cfs. To convert, multiply the value in cubic metres per day by 0.0004087346.
How do I convert 1 m³/day to cfs?
1 m³/day = 0.000408735 cfs. For any value, multiply by 0.0004087346.
How do I convert cfs back to m³/day?
Divide by the same factor — or equivalently, multiply by 2446.576. So 1 cfs = 2446.58 m³/day.
When would I need to convert cubic metre per day to cubic foot per second?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. m³/day to cfs is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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