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    Volume Conversion

    4 Cup (US) to Gallon (UK)

    Quick answer

    4 Cup (US) (cup) equals

    0.208169 gal (UK)

    To convert 4 Cup (US)s to Gallon (UK)s, multiply by 0.0520421365. Therefore, 4 Cup (US) (cup) equals 0.208169 Gallon (UK) (gal (UK)).

    Formula: gal (UK) = cup × 0.0520421365. Calculation: 4 × 0.0520421365 = 0.208169 gal (UK).

    Convert Cup (US) (cup) to Gallon (UK) (gal (UK)) online with our free unit converter. In volume, 1 cup = 0.052042 gal (UK). Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Cup (US) to Gallon (UK)

    1. Step 1 — start with the formula. gal (UK) = cup × 0.0520421365
    2. Step 2 — substitute your figure. 4 cup × 0.0520421365
    3. Step 3 — read the result. 4 cup = 0.208169 gal (UK)
    4. Step 4 — check it in reverse. cup = gal (UK) × 19.2151988081 returns 4 cup, which matches the figure you started with.

    Volume Converter

    40 units available

    Decimals:
    0.208169

    4 cup = 0.208169 gal (UK)

    Formula:

    gal (UK) = cup × 0.0520421365

    With your value: 4 cup = 0.20816855 gal (UK)

    How big is that?

    Everyday references on a logarithmic scale, all expressed in cup (us) so you can sanity-check the result.

    Milk carton (1/9.5e+2 your value)0.00423 cup
    Kitchen bucket (1/95 your value)0.0423 cup
    Car fuel tank (1/19 your value)0.211 cup
    Bathtub (1/4.7 your value)0.845 cup
    Your value4.00 cup
    Hot tub (1.6× your value)6.34 cup

    Other Cup (US) to Gallon (UK) conversions

    1 cup to gal (UK)2 cup to gal (UK)3 cup to gal (UK)5 cup to gal (UK)6 cup to gal (UK)7 cup to gal (UK)8 cup to gal (UK)Full Cup (US) to Gallon (UK) converter

    Cup (US) to Gallon (UK) Conversion Table

    Cup (US) (cup)Gallon (UK) (gal (UK))
    0.50.026021
    10.052042
    20.104084
    50.260211
    100.520421
    150.780632
    201.040843
    251.301053
    502.602107
    1005.204214
    25013.010534
    50026.021068
    100052.042137

    Gallon (UK) to Cup (US) Conversion Table

    Gallon (UK) (gal (UK))Cup (US) (cup)
    0.59.607599
    119.215199
    238.430398
    596.075994
    10192.151988
    15288.227982
    20384.303976
    25480.37997
    50960.75994
    1001,921.519881
    2504,803.799702
    5009,607.599404
    100019,215.198808

    Where these values come from

    Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

    Cup (US) (cup)

    Volume

    Exact conversion

    Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    Gallon (UK) (gal (UK))

    Volume

    Exact conversion

    The imperial gallon is exactly 4.546 09 L (Weights and Measures Act 1985).

    Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    How to Convert Cup (US) to Gallon (UK)

    To convert from Cup (US) (cup) to Gallon (UK) (gal (UK)), multiply the value by 0.0520421365.

    Formula: gal (UK) = cup × 0.0520421365

    Reverse: cup = gal (UK) × 19.2151988081

    Step-by-Step Example

    1. Start with your value in Cup (US). For example: 5 cup
    2. Multiply by the conversion factor: 5 x 0.0520421365
    3. The result is: 0.260211 gal (UK)

    Cup (US) and Gallon (UK) Relationship

    Both Cup (US) and Gallon (UK) belong to the US Customary / Imperial system, making this an intra-system conversion within volume. Since 1 Cup (US) represents a fraction of a Gallon (UK) (1 Gallon (UK) ≈ 19.2152 Cup (US)s), the Gallon (UK) is the larger measurement interval. Understanding the relationship between Cup (US) and Gallon (UK) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    About Cup (US)

    The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.

    Common uses of Cup (US): baking, cooking, recipes.

    About Gallon (UK)

    The imperial gallon equals exactly 4.54609 litres, about 20% larger than the US gallon — a frequent source of fuel-economy confusion.

    Common uses of Gallon (UK): UK fuel figures, brewing, older recipes.

    Frequently Asked Questions

    What is 4 Cup (US) in Gallon (UK)?
    4 Cup (US) equals 0.208169 Gallon (UK).
    How many Gallon (UK)s are in 1 Cup (US)?
    There are exactly 0.0520421365 Gallon (UK)s in 1 Cup (US). This means the conversion factor from Cup (US) to Gallon (UK) is 0.0520421365.
    What is the formula to convert Cup (US) to Gallon (UK)?
    The formula to convert Cup (US) to Gallon (UK) is: gal (UK) = cup × 0.0520421365. For example, to convert 10 Cup (US)s to Gallon (UK)s, you would multiply 10 by 0.0520421365.
    What is a Cup (US)?
    The US cup equals approximately 236.6 mL and is a standard cooking measurement in the United States.
    What is a Gallon (UK)?
    The imperial gallon equals exactly 4.54609 litres, about 20% larger than the US gallon — a frequent source of fuel-economy confusion.
    What are the common uses of Cup (US)?
    The Cup (US) is commonly used in baking, cooking, recipes.

    Related Volume Conversions

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    Cite this page

    UnitConvertLab. (2026). 4 Cup (US) to Gallon (UK). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/4-cup_us-to-gallon_uk