A metric cup is 250 milliliters.
Metric cups to Imperial gallons Converter — metric cup to imp gal
Convert Metric cup (metric cup) to Imperial gallon (imp gal) using the exact conversion factor (1 metric cup = 0.0549923121 imperial gallon). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Metric cups to Imperial gallons converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
An imperial gallon is exactly 4.54609 liters.
Result = input x 0.00025 / 0.00454609.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Metric cups to Imperial gallons
Metric cup and Imperial gallon appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Metric cup is typically associated with australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement), while Imperial gallon is typically associated with united Kingdom, Canada (some contexts), and other Commonwealth countries.
Formula
imperial gallons = metric cups × 0.0549923120748
This factor comes from each unit's defined relationship to the category's base unit: 1 metric cup equals 0.00025 base units, and 1 imperial gallon equals 0.00454609 base units, so dividing one by the other gives the direct metric cup-to-imperial gallon factor of 0.0549923120748.
Simple example
1 metric cup × 0.05499231207 = 0.0549923121 imp gal
1 metric cup = 0.0549923121 imperial gallons.
Real-world example
10 metric cup × 0.05499231207 = 0.5499231207 imp gal
10 metric cups = 0.5499231207 imperial gallons.
Conversion table
| Metric cup (metric cup) | Imperial gallon (imp gal) |
|---|---|
| 1 metric cup | 0.0549923121 imp gal |
| 5 metric cup | 0.2749615604 imp gal |
| 10 metric cup | 0.5499231207 imp gal |
| 25 metric cup | 1.374807802 imp gal |
| 50 metric cup | 2.749615604 imp gal |
| 100 metric cup | 5.499231207 imp gal |
Reverse conversion: Imperial gallon to Metric cup
0.0549923121 imp gal × 18.18436 = 1 metric cup
0.0549923121 imperial gallons = 1 metric cups.
metric cups = imperial gallons × 18.18436
For a page dedicated to this direction, see Imperial gallon to Metric cup.
Metric cup vs. Imperial gallon
| Aspect | Metric cup | Imperial gallon |
|---|---|---|
| Family | Non-SI unit (culinary, metric countries) | UK/imperial customary unit |
| Typical use | Recipe and cooking measurement in metric-using English-speaking countries | UK fuel and beverage measurement (historically; UK now primarily uses liters for retail) |
| Where it's used | Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement) | United Kingdom, Canada (some contexts), and other Commonwealth countries |
Understanding the Metric cup
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
Where it's used: Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement)
Metric cup vs. US cup. The metric cup (250 mL) is about 4% larger than the US cooking cup (240 mL) — small for most recipes, but worth checking when following a recipe from a different country.
Uses of the Metric cup today
- Recipe and cooking measurement in metric-using English-speaking countries
- Baking and portion measurement
History of the Metric cup
As Commonwealth countries metricated through the 20th century, cookbook publishers and standards bodies adopted a round 250 mL 'metric cup' so recipes could use a convenient, easily-scaled volume rather than the US's 240 mL or older imperial teacup conventions.
Historical origin. Metric cup was not the invention of a single named person; it developed through the process described above.
Understanding the Imperial gallon
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom, Canada (some contexts), and other Commonwealth countries
Imperial gallon vs. US gallon. Britain's 1824 Weights and Measures Act defined a new gallon based on 10 pounds of water, replacing the old wine gallon the US had already adopted — leaving the US (3.785 L) and imperial (4.546 L) gallons about 20% apart today.
Uses of the Imperial gallon today
- UK fuel and beverage measurement (historically; UK now primarily uses liters for retail)
- Commonwealth country liquid measurement in some contexts
History of the Imperial gallon
The imperial gallon was created by Britain's Weights and Measures Act of 1824, defined as the volume of 10 pounds of water, replacing several inconsistent older English gallon definitions (wine gallon, ale gallon, corn gallon) with one standard.
Historical origin. Imperial gallon was not the invention of a single named person; it developed through the process described above.
Metric cup — sources
- National Measurement Institute (Australia) — Kitchen measures — Documents the 250 mL metric cup standard.
Imperial gallon — sources
- UK Weights and Measures Act 1824 — Establishes the imperial gallon definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial gallons are in 1 metric cup?
1 metric cup equals 0.0549923121 imperial gallons, using the exact defined conversion factor rather than an estimate.
How do I convert metric cup to imperial gallon?
Multiply the metric cup value by 0.05499231207. The converter above does this instantly to whatever precision you set.
How do I convert imperial gallon back to metric cup?
Use the reverse factor: 1 imperial gallon equals 18.18436 metric cups. You can also use the swap control in the converter above to flip the direction instantly.
What is a metric cup?
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
What is a imperial gallon?
Imperial gallon (imp gal) measures volume. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. It is classified as a UK/imperial customary unit.
Is the metric cup to imperial gallon conversion exact?
Yes. The imperial gallon is defined as exactly 4.54609 liters, about 20% larger than the US gallon. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between metric cup vs. us cup?
The metric cup (250 mL) is about 4% larger than the US cooking cup (240 mL) — small for most recipes, but worth checking when following a recipe from a different country.
Where is the metric cup still used today?
Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement)