US Gallons to Metric Cups (gal to cup)
1 US gallon equals 15.14164714 metric cups (rounded).
How to convert US gallons to metric cups
To convert US gallons to metric cups, multiply the number of US gallons by 15.14164714. The factor is rounded to 10 significant digits. To go the other way, multiply metric cups by 0.06604301309 (rounded).
metric cups = US gallons × 15.14164714
Example: 10 US gallons = 151.4164714 metric cups.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Gallon (gal)
Exactly 231 cubic inches or 3.785411784 liters (128 US fluid ounces). About 17% smaller than the imperial gallon.
The US gallon is a survivor of English wine trade. Around 1706, a statute in Queen Anne's reign fixed the wine gallon at exactly 231 cubic inches, settling confusion among the competing gallons for wine, ale and corn. British colonies in North America used that wine gallon, and in 1824 Britain replaced all its gallons with a new imperial one while the United States kept the old measure. It was adopted as the legal US standard in 1836 and is still defined as exactly 231 cubic inches, or 3.785411784 liters.
That makes the US gallon about 17 percent smaller than the imperial gallon, a difference that explains why American and British fuel-economy figures cannot be compared directly. Everyday uses are milk jugs, paint cans and gasoline pumps. One gallon divides evenly into four quarts, eight pints, sixteen cups and 128 fluid ounces. A gallon of water weighs a little over 8 pounds, an easy figure to remember when loading a car with water jugs.
1 US gallon = 3.785411784 liters (exactly).
Sources: Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
Metric Cup (cup)
Exactly 250 mL. The cup used in Australia, New Zealand and most Commonwealth recipes.
A metric cup is a cup tamed by decimal thinking. Australia, Canada, New Zealand and some other former British colonies that metricated use a round 250 milliliters, exactly a quarter of a liter. Canada's older cup had been eight imperial fluid ounces, about 227.3 mL, so the metric version is noticeably larger, and Canadian recipes now usually use the 250 mL cup.
The metric cup is not an SI unit, only a practical convention, and it differs from the US cups in useful ways. It is about 6 percent larger than the US customary cup at 236.6 mL and about 4 percent larger than the 240 mL US label cup. Its arithmetic is simple: four cups make a liter, and a cup holds 50 metric teaspoons or 16 and two thirds tablespoons of 15 mL. Many recipes outside the US skip cups entirely and give dry ingredients in grams, because volume is a rough proxy for flour.
1 metric cup = 0.25 liters (exactly).
Sources: Wikipedia: Metric cup; Wikipedia: Cup (unit)
Related conversions
- Metric cups to US gallons (reverse)
- US gallons to liters
- US gallons to milliliters
- US gallons to US cups
- US gallons to US fluid ounces
- US gallons to cubic meters
- US gallons to cubic centimeters
- US gallons to US quarts
- US gallons to US pints
- US gallons to US tablespoons
- US gallons to US teaspoons
- US gallons to metric tablespoons
- US gallons to metric teaspoons
- Liters to metric cups
- Milliliters to metric cups
- US cups to metric cups
- US fluid ounces to metric cups
- Cubic meters to metric cups
- Cubic centimeters to metric cups
- US quarts to metric cups
- US pints to metric cups
- US tablespoons to metric cups
- US teaspoons to metric cups
- Metric tablespoons to metric cups
- Metric teaspoons to metric cups
See all volume units.