What Is This Tool?
This converter allows you to transform flow measurements from cubic foot per second (ft^3/s), a unit often used in hydrology and engineering for large volumetric rates, into US gallons per day (gal (US)/d), commonly applied for household water consumption and small-scale flow measurements.
How to Use This Tool?
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Enter the volumetric flow value in cubic foot per second (ft^3/s).
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Select gallon (US) per day [gal (US)/d] as the target unit.
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Click the convert button to obtain the equivalent flow rate.
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Review the converted value to support your hydrology or engineering analysis.
Key Features
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Converts flow rates between cubic foot per second and gallon (US) per day.
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Supports units common in hydrology, engineering, water treatment, and plumbing.
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Uses a precise fixed conversion rate of 1 ft^3/s equals 646,316.88314858 gal (US)/d.
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Browser-based and easy to use with fast results.
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Suitable for interpreting large and small volumetric flow data across different time scales.
Examples
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Convert 2 ft^3/s: 2 × 646,316.88314858 = 1,292,633.77 gal (US)/d
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Convert 0.5 ft^3/s: 0.5 × 646,316.88314858 = 323,158.44 gal (US)/d
Common Use Cases
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Reporting river and stream discharge for hydrology and flood forecasting.
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Designing pumps, pipes, and irrigation systems using standard flow units.
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Sizing flow rates for hydraulic turbines and large HVAC systems.
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Monitoring household or per-capita water consumption in the US.
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Evaluating chemical dosing rates and leak flows in water treatment and plumbing.
Tips & Best Practices
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Verify stable flow conditions before applying the conversion.
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Be mindful of the unit time difference—seconds versus days—when interpreting results.
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Use the tool for approximate daily flow understanding and communication.
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Check flow consistency to ensure meaningful conversion outcomes.
Limitations
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Conversion produces very large numbers due to differing unit magnitudes, which can be impractical for very small flow rates.
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Time base differences require accurate time measurement to maintain conversion validity.
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Does not consider temporal variations or intermittent flow changes.
Frequently Asked Questions
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What does one cubic foot per second represent?
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It represents an imperial/US customary flow rate unit where one cubic foot of fluid passes a point every second, commonly used in engineering and hydrology.
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Why convert from cubic foot/second to gallon (US)/day?
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This conversion helps translate large hydrology or engineering flow measurements into daily volume units useful for household or small-scale water usage analysis.
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Are the units compatible in terms of time?
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They differ in time base—cubic foot/second uses seconds while gallon (US)/day uses days—so an accurate time basis is essential during conversion.
Key Terminology
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Cubic foot per second (ft^3/s)
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A flow rate unit equal to one cubic foot of fluid passing a point per second, used primarily in hydrology and engineering.
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Gallon (US) per day (gal (US)/d)
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A volumetric flow rate unit representing one US liquid gallon passing a point in one day, common in water consumption and small-scale flow contexts.