Magnums to Liters (magnum to L)

1 magnum equals 1.5 liters exactly.

1 magnum = 1.5 liters

How to convert magnums to liters

To convert magnums to liters, multiply the number of magnums by 1.5. This factor is exact. To go the other way, multiply liters by 0.6666666667 (rounded).

liters = magnums × 1.5

Example: 10 magnums = 15 liters.

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

Magnum (magnum)

Cooking & barCurrent unit

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

Liter (L)

Metric (SI)Current unit

One cubic decimeter (1,000 cm³). The everyday metric unit of volume for drinks, fuel and cooking.

The liter was born in revolutionary France. In 1795 it was introduced as a republican unit and defined as one cubic decimeter, while the gram was tied to a cubic centimeter of water. The name comes from the older French litron, itself descended from a Byzantine Greek unit of weight, not volume. A small revision of the decimeter in 1798 left the first liter about 1.000974 of today's cubic decimeter, and in 1879 the international metric authorities adopted the liter with the symbol l.

The liter then took a strange detour. In 1901 it was redefined as the space taken up by one kilogram of pure water at its densest, which made it about 1.000028 cubic decimeters, and that muddled definition lasted until 1964, when it was restored to exactly one cubic decimeter. A capital L was added as an alternative symbol in 1979 because a lowercase l is easy to mistake for the digit 1, and NIST says L is the symbol to use in the United States. A liter of water is close to a kilogram, which is why a one-liter bottle feels like a kilo in the hand.

The liter is the reference unit for volume on this site.

Sources: Wikipedia: Litre; NIST Guide to the SI, Chapter 5: units outside the SI

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