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Volumetric Flow Rate

gal/day (US)tomL/s

Convert US gallons per day (gal/day (US)) to millilitres per second (mL/s).

Factor1 gal/day (US) = 0.04381264 mL/s

Converter

gal/day (US)

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

Result
43.8126mL/s

Rendered to 6 significant figures.

Formula

Formula
mL/s = gal/day (US) × 0.04381264

Multiply any value in US gallons per day by 0.04381264 to obtain the value in millilitres per second.

Worked example

Convert 1000 gal/day (US) to mL/s.

  1. 01Start with 1000 gal/day (US).
  2. 02Multiply by the conversion factor: 1000 × 0.04381264 = 43.8126 mL/s.
Result1000 gal/day (US) = 43.8126 mL/s

Conversion table

gal/day (US)mL/s
10.043813
20.087625
50.21906
100.43813
200.87625
502.1906
1004.3813
2008.7625
50021.906
100043.813

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gal/day (US) to mL/s?
1 gal/day (US) equals 0.04381264 mL/s. To convert, multiply the value in US gallons per day by 0.04381264.
How do I convert 1 gal/day (US) to mL/s?
1 gal/day (US) = 0.0438126 mL/s. For any value, multiply by 0.04381264.
How do I convert mL/s back to gal/day (US)?
Divide by the same factor — or equivalently, multiply by 22.82447. So 1 mL/s = 22.8245 gal/day (US).
When would I need to convert US gallon per day to millilitre 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. gal/day (US) to mL/s 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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