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Volumetric Flow Rate

gph (US)toL/hr

Convert US gallons per hour (gph (US)) to litres per hour (L/hr).

Factor1 gph (US) = 3.785412 L/hr

Converter

gph (US)

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

Result
378.541L/hr

Rendered to 6 significant figures.

Formula

Formula
L/hr = gph (US) × 3.785412

Multiply any value in US gallons per hour by 3.785412 to obtain the value in litres per hour.

Worked example

Convert 100 gph (US) to L/hr.

  1. 01Start with 100 gph (US).
  2. 02Multiply by the conversion factor: 100 × 3.785412 = 378.541 L/hr.
Result100 gph (US) = 378.541 L/hr

Conversion table

gph (US)L/hr
13.7854
27.5708
518.927
1037.854
2075.708
50189.27
100378.54
200757.08
5001892.7
10003785.4

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gph (US) to L/hr?
1 gph (US) equals 3.785412 L/hr. To convert, multiply the value in US gallons per hour by 3.785412.
How do I convert 1 gph (US) to L/hr?
1 gph (US) = 3.78541 L/hr. For any value, multiply by 3.785412.
How do I convert L/hr back to gph (US)?
Divide by the same factor — or equivalently, multiply by 0.2641721. So 1 L/hr = 0.264172 gph (US).
When would I need to convert US gallon per hour to litre per hour?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. gph (US) to L/hr 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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