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Gallon (US)/minute to Cubic foot/minute (gal (US)/min to ft³/min) Calculator

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Live Conversion • ISO 80000-4:2019 Certified
1 Gallon (US)/minute = 0.13368056 Cubic foot/minute
1 gal (US)/min = 0.133681 ft³/min • 1 ft³/min = 7.480519 gal (US)/min
Gallon (US)/minute to Cubic foot/minute: One Gallon (US)/minute is equal to 0.13368056 Cubic Feet/minute.
Certified Authority Value
0.13368056
ft³/min
Exact: 1 ft³/min ≡ 7.4805194805 gal (US)/min
gal (US)/min
gal (US)/min
Swap to Cubic foot/minute to Gallon (US)/minute
ft³/min
ft³/min 0.13368056
Quick Values:
1 gal (US)/min 5 gal (US)/min 10 gal (US)/min 25 gal (US)/min 50 gal (US)/min 100 gal (US)/min 250 gal (US)/min 500 gal (US)/min 1,000 gal (US)/min
Conversion Formula
To convert Gallon (US)/minute to Cubic foot/minute, multiply by 0.13368056
gal (US)/min × 0.13368056 = ft³/min

Calculation: 1 gal (US)/min × 0.13368056 = 0.13368056 ft³/min

Common Gallon (US)/minute to Cubic foot/minute Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Gallon (US)/minute (gal (US)/min) and Cubic foot/minute (ft³/min).

Tap any row to calculate
Gallon (US)/minute to Cubic foot/minute: Primary Direct Table (15 Steps)
Gallon (US)/minute to Cubic foot/minute Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 gal (US)/min is equal to 0.000133681 ft³/min (Cubic foot/minute) 1.337 × 10⁻⁴
0.01 gal (US)/min is equal to 0.00133681 ft³/min (Cubic foot/minute) 1.337 × 10⁻³
0.1 gal (US)/min is equal to 0.0133681 ft³/min (Cubic foot/minute) 1.337 × 10⁻²
0.5 gal (US)/min is equal to 0.0668403 ft³/min (Cubic foot/minute) 6.684 × 10⁻²
1 gal (US)/min is equal to 0.133681 ft³/min (Cubic foot/minute) 1.337 × 10⁻¹
2 gal (US)/min is equal to 0.267361 ft³/min (Cubic foot/minute) 2.674 × 10⁻¹
5 gal (US)/min is equal to 0.668403 ft³/min (Cubic foot/minute) 6.684 × 10⁻¹
10 gal (US)/min is equal to 1.336806 ft³/min (Cubic foot/minute) 1.337 × 10⁰
20 gal (US)/min is equal to 2.673611 ft³/min (Cubic foot/minute) 2.674 × 10⁰
25 gal (US)/min is equal to 3.342014 ft³/min (Cubic foot/minute) 3.342 × 10⁰
50 gal (US)/min is equal to 6.684028 ft³/min (Cubic foot/minute) 6.684 × 10⁰
100 gal (US)/min is equal to 13.368056 ft³/min (Cubic foot/minute) 1.337 × 10¹
250 gal (US)/min is equal to 33.420139 ft³/min (Cubic foot/minute) 3.342 × 10¹
500 gal (US)/min is equal to 66.840278 ft³/min (Cubic foot/minute) 6.684 × 10¹
1000 gal (US)/min is equal to 133.680556 ft³/min (Cubic foot/minute) 1.337 × 10²
Cubic foot/minute to Gallon (US)/minute: Reciprocal Summary
Cubic foot/minute to Gallon (US)/minute Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 ft³/min is equal to 7.480519 gal (US)/min (Gallon (US)/minute) 7.481 × 10⁰
5 ft³/min is equal to 37.402597 gal (US)/min (Gallon (US)/minute) 3.74 × 10¹
10 ft³/min is equal to 74.805195 gal (US)/min (Gallon (US)/minute) 7.481 × 10¹
50 ft³/min is equal to 374.025974 gal (US)/min (Gallon (US)/minute) 3.74 × 10²
100 ft³/min is equal to 748.051948 gal (US)/min (Gallon (US)/minute) 7.481 × 10²
View Complete 15-Row Cubic foot/minute to Gallon (US)/minute Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Gallon (US)/minute (gal (US)/min) and Cubic foot/minute (ft³/min):

Gallon (US)/minute References:

  • EPA WaterSense certified residential bathroom sink faucet flow limit (1.5 gpm) 1.5 gpm
  • Standard residential outdoor garden hose discharge delivery flow rate (5 gpm) 5 gpm
  • Commercial building automatic fire sprinkler head water discharge rate (25 gpm) 25 gpm
  • Fire department commercial attack line firefighting hose water delivery (150 gpm) 150 gpm

Cubic foot/minute References:

  • Standard residential bathroom moisture ventilation exhaust ceiling fan rating (80 CFM) 80 CFM
  • Workshop pneumatic air compressor continuous compressed air delivery (15 CFM) 15 CFM
  • Commercial whole-home central HVAC air handler airflow circulation volume (1,200 CFM) 1200 CFM

Tap any benchmark above to automatically calculate its exact equivalent in Cubic foot/minute.

ISQ Dimension: [L³ T⁻¹] Coherent SI Unit: cubic meter per second (m³/s) Fluid Dynamics & Rheology

How to Convert Gallon (US)/minute to Cubic foot/minute

Converting Gallon (US)/minute (gal (US)/min) to Cubic foot/minute (ft³/min) is a core calculation in Volumetric Flow Rate, which quantifies the volume of fluid passing through a designated conduit cross-section per unit of time. This calculation navigates the boundary between the International Metric System (SI) and British Imperial / US Customary engineering standards. In contemporary metrology, Imperial units are defined in terms of exact SI standards via international agreements—notably NIST SP 811 and the 1959 International Yard and Pound Agreement. Exactly 1 Gallon (US)/minute equals 0.133681 Cubic foot/minute, while 1 ft³/min equals 7.480519 gal (US)/min.

Direct Factor1 gal (US)/min = 0.133681 ft³/min
Inverse Ratio1 ft³/min = 7.480519 gal (US)/min
Conversion ScaleMetric SI to British Imperial / US Customary Bridge
First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (cubic meter per second (m³/s)) without arbitrary rounding:

Vtarget=Vsource×(ksource→SIktarget→SI)V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)
Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)
1. Source SI Bridge (ksource):1 gal (US)/min = 6.30902 × 10⁻⁵ cubic meter per second (m³/s)
2. Target SI Bridge (ktarget):1 ft³/min = 0.000471947 cubic meter per second (m³/s)
Step-by-step substitution for Gallon (US)/minute → Cubic foot/minute:V(ft³/min) = V(gal (US)/min) × ( 6.30902 × 10⁻⁵ / 0.000471947 ) = V(gal (US)/min) × 0.133681
Mathematical FormulaValue in Cubic foot/minute = Value in Gallon (US)/minute × 0.13368056Direct computational formula applied for standard conversion.
Worked Example

For an engineering input of 36 gal (US)/min, applying the conversion factor yields exactly 4.8125 ft³/min. At larger operational scale, 1000 Gallon (US)/minute corresponds to 133.680556 ft³/min.

Inverse check: 1 ft³/min = 7.480519 gal (US)/min.

Understanding Gallon (US)/minute and Cubic foot/minute

Gallon (US)/minute

gal (US)/min
Imperial / US

A Gallon (US)/minute (gal (US)/min) is an imperial and US customary unit for volumetric flow rate.

Applications & Practical Context

In practical flow terms, a EPA WaterSense certified residential bathroom sink faucet flow limit (1.5 gpm) equals 1.5 gpm, a standard residential outdoor garden hose discharge delivery flow rate (5 gpm) equals 5 gpm, a commercial building automatic fire sprinkler head water discharge rate (25 gpm) equals 25 gpm.

Physical Setup

A physical magnitude of 1 gal (US)/min corresponds to 6.30902 × 10⁻⁵ m³/s in standard SI measurement.

Conversion to SI Unit: cubic meter per second (m³/s)
1 gal (US)/min = 6.30902 × 10⁻⁵ m³/s

Cubic foot/minute

ft³/min
Imperial / US

A Cubic foot/minute (ft³/min) is an imperial and US customary unit for volumetric flow rate.

Applications & Practical Context

In practical flow terms, a standard residential bathroom moisture ventilation exhaust ceiling fan rating (80 CFM) equals 80 CFM, a workshop pneumatic air compressor continuous compressed air delivery (15 CFM) equals 15 CFM, a commercial whole-home central HVAC air handler airflow circulation volume (1,200 CFM) equals 1200 CFM.

Physical Setup

A physical magnitude of 1 ft³/min corresponds to 0.000471947 m³/s in standard SI measurement.

Conversion to SI Unit: cubic meter per second (m³/s)
1 ft³/min = 0.000471947 m³/s

Domain Metrology & Engineering Applications

Governing Law & Equation

Hydrodynamic Continuity Equation (Q = A · v̄)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using electromagnetic inductive flowmeters, ultrasonic transit-time meters, turbine flowmeters, and differential orifice plates.

Primary Industry Sectors

Applied across municipal water supply distribution, chemical process loops, oil & gas pipeline custody transfer, and HVAC hydronic balancing under international metrology standard ISO 80000-4:2019, ASME MFC-3M.

Physical Orders of Magnitude & Laboratory Reference Benchmarks

Physical Phenomenon / Engineering ReferenceReference ValueConverted to Cubic foot/minute
EPA WaterSense certified residential bathroom sink faucet flow limit (1.5 gpm)1.5 gpm0.200521 ft³/min
Standard residential outdoor garden hose discharge delivery flow rate (5 gpm)5 gpm0.668403 ft³/min
Commercial building automatic fire sprinkler head water discharge rate (25 gpm)25 gpm3.342014 ft³/min
Fire department commercial attack line firefighting hose water delivery (150 gpm)150 gpm20.052083 ft³/min
Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-4:2019, ASME MFC-3M and the BIPM SI Brochure (9th Edition). Governed by Hydrodynamic Continuity Equation (Q = A · v̄) under ISO 80000 dimensional vector [L³ T⁻¹].

Multi-Variable Engineering Bridge Precision Fluid Continuity

Volumetric Flow & Fluid Continuity Bridge (GPM • CFM • m³/h • L/min • L/s • ft³/h)

Directly convert mass flow rate (ṁ) into volumetric flow (Q) across process fluids using the thermodynamic continuity equation ṁ = ρ × Q, bridging mass flow [M T⁻¹] and volumetric flow [L³ T⁻¹] via fluid density (ρ).

Q = ṁ / ρ
Live Calculated Bridge Equivalent:
1 gal (US)/min at Water (20°C / Standard Ambient) = 0.001002 GPM
Equals 0.0001339 CFM • 0.0002275 m³/h • 0.003792 L/min
US Pump Standard
0.001002
GPM
US Gallons per Minute
Air / Gas Flow
0.0001339
CFM
Cubic Feet per Minute
Metric Standard
0.0002275
m³/h
Cubic Meters per Hour
Hydraulics & Lab
0.003792
L/min
Liters per Minute
High Volume
6.3204 × 10⁻⁵
L/s
Liters per Second
Burners & Fuel
0.008
ft³/h
Cubic Feet per Hour
  1. 1. Normalize Input to SI Base Unit (kg/s):
    ṁ = 1 gal (US)/min × 6.30901964 × 10⁻⁵ = 6.30901964 × 10⁻⁵ kg/s
  2. 2. Apply Engineering Parameter (ρ):
    Selected condition: Water (20°C / Standard Ambient) at ρ = 998.2 kg/m³
  3. 3. Execute Governing Physical Law in SI Units:
    Q = ṁ / ρ = (6.30901964 × 10⁻⁵) ÷ (998.2) = 6.320396 × 10⁻⁸ m³/s
  4. 4. Convert to Standard Engineering Units:
    • GPM: 6.320396 × 10⁻⁸ × 15850.3231 = 0.001002 GPM (US Gallons per Minute) • CFM: 6.320396 × 10⁻⁸ × 2118.88 = 0.0001339 CFM (Cubic Feet per Minute) • m³/h: 6.320396 × 10⁻⁸ × 3600 = 0.0002275 m³/h (Cubic Meters per Hour) • L/min: 6.320396 × 10⁻⁸ × 60000 = 0.003792 L/min (Liters per Minute) • L/s: 6.320396 × 10⁻⁸ × 1000 = 6.3204 × 10⁻⁵ L/s (Liters per Second) • ft³/h: 6.320396 × 10⁻⁸ × 127132.8002 = 0.008 ft³/h (Cubic Feet per Hour)
Explore Full Density Converter →
Engineering Substance / Operating Standard Parameter Value (kg/m³) Reference State / Condition Typical Industrial & Engineering Application
Water (20°C / Standard Ambient) 998.2 20°C (68°F), 1 atm Hydronic HVAC & cooling water (NIST)
Water (4°C / Maximum Density) 1000 4°C (39.2°F), 1 atm Pure metrology reference standard (SG = 1.0)
Water (100°C / Saturated Liquid) 958.4 100°C (212°F), 1 atm Boiler condensate returns & district hot water
Saturated Steam (100°C, 1 atm) 0.5977 100°C, 1.01325 bar Boiler steam piping & relief headers (IAPWS-97)
Air (Standard Ambient / NTP 20°C) 1.204 20°C (68°F), 101.325 kPa (ISO 5011) Compressor SCFM rating, blower sizing & HVAC duct air
Air at STP (0°C, 1 atm) 1.292 0°C (32°F), 101.325 kPa (IUPAC) Standard European gas metering & chemical plant feeds
Diesel Fuel (EN 590 / No. 2-D, 20°C) 832 20°C (68°F), ASTM D975 / EN 590 Engine fuel telemetry, BSFC dyno & generator consumption
Gasoline / Petrol (ASTM D4814, 15°C) 740 15°C (59°F), ASTM D4814 Automotive port & direct fuel injector calibrations
Natural Gas / Methane (STP: 0°C, 1 atm) 0.717 0°C, 1 atm (Pure CH₄ approximation) Gas turbine firing rate & burner pipeline supply
Engine Lubricating Oil (SAE 30, 20°C) 885 20°C, typical kinematic grade 100 cSt Engine lube circuits, turbo feed lines & cooling loops
Hydraulic Oil (ISO VG 46, 20°C) 870 20°C, mineral hydraulic fluid Hydraulic power packs, cylinder pump flows & servo valves
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Frequently Asked Questions

There are exactly 0.13368056 cubic feet/minute (ft³/min) in 1 gallon (us)/minute (gal (US)/min). To calculate larger amounts manually, simply multiply your total number of gallons (us)/minute by the conversion multiplier of 0.13368056.

The mathematical formula to convert gallons (us)/minute to cubic feet/minute is: [value] * 0.13368056 = cubic feet/minute. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from cubic feet/minute back to gallons (us)/minute, you must divide your starting value by 0.13368056. Our bidirectional tool automatically computes this inverse equation the moment you type into the cubic foot/minute input field.

1 Cubic foot/minute is larger than 1 Gallon (US)/minute. Specifically, 1 Gallon (US)/minute equals 0.13368056 cubic feet/minute, meaning 1 Cubic foot/minute is 7.4805 times larger than 1 Gallon (US)/minute (a difference of 0.87 orders of magnitude). Expressing measurements in gallons (us)/minute requires a larger numerical value to represent the equivalent physical magnitude.

A typical EPA WaterSense certified residential bathroom sink faucet flow limit (1.5 gpm) measures 1.5 gpm, which corresponds to 0.2005 Cubic Foot Per Minute (Cubic foot/minute).

Based on standard US Customary measurements, 1 gal (US)/min = 0.133681 ft³/min.

The flow relationship is defined by V(ft³/min) = V(gal (US)/min) × 0.133681.

The standard reverse calculation is V(gal (US)/min) = V(ft³/min) × 7.48052.

Translating fluid flow from gallons to cubic feet per minute is critical in designing combined hydro-pneumatic vessels and compressor systems.

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