Volumetric Flow Rate
gph (US)toL/s
Convert US gallons per hour (gph (US)) to litres per second (L/s).
Factor1 gph (US) = 0.001051503 L/s
Converter
gph (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
L/s
Rendered to 6 significant figures.
Formula
Formula
L/s = gph (US) × 0.001051503
Multiply any value in US gallons per hour by 0.001051503 to obtain the value in litres per second.
Worked example
Convert 1000 gph (US) to L/s.
- 01Start with 1000 gph (US).
- 02Multiply by the conversion factor: 1000 × 0.001051503 = 1.0515 L/s.
Result1000 gph (US) = 1.0515 L/s
Conversion table
| gph (US) | L/s |
|---|---|
| 1 | 0.0010515 |
| 2 | 0.002103 |
| 5 | 0.0052575 |
| 10 | 0.010515 |
| 20 | 0.02103 |
| 50 | 0.052575 |
| 100 | 0.10515 |
| 200 | 0.2103 |
| 500 | 0.52575 |
| 1000 | 1.0515 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gph (US) to L/s?
1 gph (US) equals 0.001051503 L/s. To convert, multiply the value in US gallons per hour by 0.001051503.
How do I convert 1 gph (US) to L/s?
1 gph (US) = 0.0010515 L/s. For any value, multiply by 0.001051503.
How do I convert L/s back to gph (US)?
Divide by the same factor — or equivalently, multiply by 951.0194. So 1 L/s = 951.019 gph (US).
When would I need to convert US gallon per hour to litre 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. gph (US) to L/s is a frequently needed conversion for hydraulic sizing.
Is the conversion exact?
Yes. Both gph (US) and L/s are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).