UnitsConverter

Gallon (UK) to Cup Converter

Convert UK gallons to cups with our free online volume converter.

Quick Answer

1 Gallon (UK) = 19.215199 cups

Formula: Gallon (UK) × conversion factor = Cup

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Gallon (UK) to Cup Calculator

How to Use the Gallon (UK) to Cup Calculator:

  1. Enter the value you want to convert in the 'From' field (Gallon (UK)).
  2. The converted value in Cup will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Volume category.
  4. Click the swap button (⇌) to reverse the conversion direction.
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How to Convert Gallon (UK) to Cup: Step-by-Step Guide

Converting Gallon (UK) to Cup involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Gallon (UK) = 19.2152 cups

Example Calculation:

Convert 10 UK gallons: 10 × 19.2152 = 192.152 cups

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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What is a Gallon (UK) and a Cup?

The UK gallon (Imperial gallon) is a unit of volume defined as 4.54609 litres.

The US Customary Cup

1 US Cup = 236.588237 milliliters (exactly)

This is defined as exactly 8 US fluid ounces.

Breakdown:

  • 1 cup = 8 fluid ounces
  • 1 cup = 16 tablespoons
  • 1 cup = 48 teaspoons
  • 1 cup = 1/2 pint
  • 1 cup = 1/4 quart
  • 1 cup = 1/16 gallon

The Metric Cup

1 Metric Cup = 250 milliliters (exactly)

Used in Australia, New Zealand, and Canada for recipes.

Why 250 mL?

  • Nice round number in the metric system.
  • Close to the US cup (only 5.7% larger).
  • Easy to work with (1/4 liter).

The Imperial Cup

1 Imperial Cup = 284.131 milliliters

Based on the imperial fluid ounce (10 imperial fl oz).

  • Rarely used today (UK now uses metric).
  • 20% larger than a US cup.

Dry vs. Liquid Cups

Important Distinction:

Liquid Measuring Cups:

  • Have a spout for pouring.
  • Marked below the rim (to prevent spilling).
  • Measured by filling to the line.

Dry Measuring Cups:

  • Flat rim (for leveling).
  • Filled to the brim and leveled with a knife.
  • More accurate for flour, sugar, etc.

Volume is the same (8 fl oz), but the measuring technique differs.

Note: The Gallon (UK) is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Cup belongs to the imperial/US customary system.

History of the Gallon (UK) and Cup

The Imperial gallon was defined based on the volume of 10 pounds of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury and at a temperature of 62 °F.

: From Teacups to Standardization

Before 1896: Chaos in the Kitchen

Before standardization, recipes were vague:

  • "A teacup of flour" (but teacups varied in size!)
  • "A coffee cup of sugar" (different from a teacup!)
  • "A wine glass of milk" (which size glass?)

This led to inconsistent results. The same recipe could turn out differently every time.

Fannie Farmer's Revolution (1896)

Fannie Merritt Farmer, director of the Boston Cooking School, published the "Boston Cooking-School Cook Book" in 1896.

Her Innovation:

  • Standardized the cup to exactly 8 fluid ounces.
  • Introduced level measurements (level off with a knife).
  • Specified exact amounts (1 cup, 1/2 cup, 1/4 cup).

Impact:

  • Recipes became reproducible.
  • Home cooks could follow recipes with confidence.
  • The cup became the standard in American cooking.

The Metric Cup (1970s)

When Australia, New Zealand, and Canada adopted the metric system, they created the metric cup (250 mL).

Why not use the US cup?

  • 236.59 mL is an awkward number in metric.
  • 250 mL is a round number (1/4 liter).

Result:

  • US recipes use 236.59 mL cups.
  • Australian/NZ recipes use 250 mL cups.
  • Confusion when converting between systems!

Common Uses and Applications: UK gallons vs cups

Explore the typical applications for both Gallon (UK) (imperial/US) and Cup (imperial/US) to understand their common contexts.

Common Uses for UK gallons

  • Fuel Measurement: Used for measuring fuel (petrol, diesel) in the UK and some Commonwealth countries.
  • Beverages: Selling milk and other beverages in large containers in the UK.
  • Household Liquids: Measuring paint and other household liquids.
  • Pools & Water: Pool capacity and water usage measurements in the UK.
  • Industry: Some industrial applications in countries using the Imperial system.

When to Use cups

1. Baking

The cup is essential for American baking recipes.

Standard Measurements:

  • Flour: 1-3 cups (depending on recipe)
  • Sugar: 1/2 - 2 cups
  • Butter: 1/2 - 1 cup (1-2 sticks)
  • Milk: 1/2 - 1 cup

Precision Matters:

  • Too much flour: Dry, dense baked goods.
  • Too little flour: Flat, soggy results.
  • Solution: Spoon flour into cup, level off (don't scoop and pack).

2. Cooking

Liquids:

  • Water, broth, milk: Easy to measure in cups.
  • Oil: 1/4 - 1/2 cup for sautéing.

Grains:

  • Rice: 1 cup uncooked = 3 cups cooked.
  • Pasta: 2 cups uncooked = 4 cups cooked.

Vegetables:

  • Chopped vegetables: 1-2 cups (onions, peppers, etc.).

3. Nutrition & Serving Sizes

USDA Serving Sizes:

  • Cooked Rice: 1 cup = 1 serving.
  • Pasta: 1 cup cooked = 1 serving.
  • Vegetables: 1 cup raw = 1 serving.
  • Milk: 1 cup = 1 serving (8 oz).
  • Cereal: 1 cup = 1 serving (varies by type).

4. Coffee & Beverages

Coffee Brewing:

  • Standard Ratio: 1-2 tablespoons coffee per 1 cup (6 oz) water.
  • Note: A "cup" of coffee is often 6 oz, not 8 oz!

Tea:

  • 1 cup water (8 oz) per tea bag.

Additional Unit Information

About Gallon (UK) (gal)

Is a UK gallon the same as a US gallon?

No, the UK (Imperial) gallon is defined as 4.54609 liters, while the US liquid gallon is defined as 3.785411784 liters. The UK gallon is approximately 20% larger than the US gallon.

How many pints are in a UK gallon?

There are exactly 8 Imperial pints in 1 UK (Imperial) gallon. This is the same number as in the US system, but since the Imperial pint is larger than the US pint, the total volume differs.

When did the UK adopt the Imperial gallon?

The Imperial gallon was established in 1824 as part of the British Weights and Measures Act, which standardized various units throughout the British Empire. Prior to this standardization, several different gallon measures were in use for different purposes.

About Cup (cup)

Is a cup the same everywhere?

No! There are three main types:

US Customary Cup: 236.59 mL (8 US fl oz)

  • Used in: United States

Metric Cup: 250 mL

  • Used in: Australia, New Zealand, Canada

Imperial Cup: 284 mL (10 imperial fl oz)

  • Used in: Historical UK recipes (rarely used today)

Difference:

  • Metric cup is 5.7% larger than US cup.
  • Imperial cup is 20% larger than US cup.

Impact:

  • Using the wrong cup can affect recipe results!
  • Always check which cup system a recipe uses.

How many tablespoons are in a cup?

16 tablespoons = 1 cup

Breakdown:

  • 1/4 cup = 4 tablespoons
  • 1/3 cup = 5⅓ tablespoons
  • 1/2 cup = 8 tablespoons
  • 2/3 cup = 10⅔ tablespoons
  • 3/4 cup = 12 tablespoons

Why This Matters:

  • If you don't have a 1/3 cup measure, use 5 tablespoons + 1 teaspoon.

Is a dry cup different from a liquid cup?

Same volume, different measuring technique.

Liquid Cup:

  • Tool: Measuring cup with spout and markings below rim.
  • Method: Pour liquid to the line, check at eye level.
  • Use: Water, milk, oil, broth.

Dry Cup:

  • Tool: Measuring cup with flat rim.
  • Method: Scoop or spoon ingredient, level off with knife.
  • Use: Flour, sugar, rice, oats.

Why It Matters:

  • Flour: Scooping packs it down (too much flour).
  • Correct: Spoon flour into cup, level off.

How do I measure flour correctly?

The Right Way (Spoon & Level):

  1. Fluff the flour in the bag/container.
  2. Spoon flour into the measuring cup (don't scoop!).
  3. Level off with a straight edge (knife, spatula).

The Wrong Way (Scoop & Pack):

  • Scooping directly from the bag packs flour down.
  • Can add 25-30% more flour than intended.
  • Results in dry, dense baked goods.

Weight is Better:

  • 1 cup all-purpose flour = 120-125 g (spooned & leveled).
  • 1 cup all-purpose flour = 140-150 g (scooped & packed).
  • Use a kitchen scale for precision!

Can I use a coffee mug as a measuring cup?

Not recommended!

Why:

  • Coffee mugs vary in size (8-16 oz).
  • No markings for precise measurement.
  • Not calibrated for cooking.

Exception:

  • If you're making a ratio-based recipe (e.g., 1 mug rice to 2 mugs water), it works because the ratio stays consistent.

Best Practice:

  • Use proper measuring cups ($5-10 for a set).

How many cups in a pound?

It depends on the ingredient! Volume ≠ Weight.

| Ingredient | Cups per Pound | |------------|----------------| | Water | 1.9 cups | | All-Purpose Flour | 3.6-4 cups | | Granulated Sugar | 2.25 cups | | Brown Sugar (Packed) | 2 cups | | Butter | 2 cups (4 sticks) | | Rice (Uncooked) | 2.4 cups | | Honey | 1.33 cups |

Key Insight: Always check a conversion chart for the specific ingredient!

Why do British recipes use grams instead of cups?

Accuracy!

Volume (Cups):

  • Inconsistent: Packing affects measurement.
  • Ingredient-dependent: 1 cup flour ≠ 1 cup sugar in weight.

Weight (Grams):

  • Consistent: 100 g flour is always 100 g.
  • Precise: No packing variability.
  • Professional: All commercial baking uses weight.

US vs. UK Baking Culture:

  • US: Home cooks use cups (tradition, convenience).
  • UK: Home cooks use grams (metric system adoption).

How do I convert a US recipe to metric?

Method 1: Use Metric Cups (Australia/NZ)

  • Replace US cups with metric cups (250 mL).
  • Note: 5.7% difference may affect results.

Method 2: Use Weight (Recommended)

  • Convert cups to grams using a conversion chart.
  • Example: 1 cup flour (US) = 120 g.

Method 3: Use Milliliters

  • 1 US cup = 237 mL (round to 240 mL for simplicity).

Conversion Table: Gallon (UK) to Cup

Gallon (UK) (gal)Cup (cup)
0.59.608
119.215
1.528.823
238.43
596.076
10192.152
25480.38
50960.76
1001,921.52
2504,803.8
5009,607.599
1,00019,215.199

People Also Ask

How do I convert Gallon (UK) to Cup?

To convert Gallon (UK) to Cup, enter the value in Gallon (UK) in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our volume converter page to convert between other units in this category.

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What is the conversion factor from Gallon (UK) to Cup?

The conversion factor depends on the specific relationship between Gallon (UK) and Cup. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Cup back to Gallon (UK)?

Yes! You can easily convert Cup back to Gallon (UK) by using the swap button (⇌) in the calculator above, or by visiting our Cup to Gallon (UK) converter page. You can also explore other volume conversions on our category page.

Learn more →

What are common uses for Gallon (UK) and Cup?

Gallon (UK) and Cup are both standard units used in volume measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our volume converter for more conversion options.

For more volume conversion questions, visit our FAQ page or explore our conversion guides.

Helpful Conversion Guides

Learn more about unit conversion with our comprehensive guides:

📚 How to Convert Units

Step-by-step guide to unit conversion with practical examples.

🔢 Conversion Formulas

Essential formulas for volume and other conversions.

⚖️ Metric vs Imperial

Understand the differences between measurement systems.

⚠️ Common Mistakes

Learn about frequent errors and how to avoid them.

View All Guides →

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Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Volume Measurement

National Institute of Standards and Technology — Standards for volume measurements

Last verified: February 19, 2026