US Gallons to Magnums (gal to magnum)
1 US gallon equals 2.523607856 magnums exactly.
How to convert US gallons to magnums
To convert US gallons to magnums, multiply the number of US gallons by 2.523607856. This factor is exact. To go the other way, multiply magnums by 0.3962580785 (rounded).
magnums = US gallons × 2.523607856
Example: 10 US gallons = 25.23607856 magnums.
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
Magnum (magnum)
1.5 liters, two standard wine bottles.
Latin magnus, great, gives the magnum its name, a bottle holding 1.5 liters, exactly two standard 750 mL bottles. It is the smallest of the large formats in Wikipedia's table of wine bottle sizes and the one most often seen in ordinary shops and restaurants.
Wikipedia reports that most Champagne houses ferment only up to a magnum in the bottle, because bigger bottles are hard to riddle, and that larger formats are filled by transfer afterwards, which some believe lowers quality. The same article lists the magnum as the first step of a ladder of named sizes: double magnum at 3 L, Rehoboam at 4.5 L, Methuselah at 6 L. Its capacity is equivalent to about 50.7 US fluid ounces. Its date of first use is not given in the sources consulted here.
1 magnum = 1.5 liters (exactly).
Sources: Wikipedia: Wine bottle
Related conversions
- Magnums 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 cups
- US gallons to metric tablespoons
- Liters to magnums
- Milliliters to magnums
- US cups to magnums
- US fluid ounces to magnums
See all volume units.