How many litres does a standard Champagne magnum hold?

A standard Champagne magnum holds 1.5 litres.

That capacity equals two standard 750-millilitre bottles. Magnum is one of the most familiar large-format Champagne bottles and is widely associated with celebrations, restaurants and formal events. Its larger volume can also affect the wine’s aging environment because the ratio of wine to oxygen exposure is different from that of smaller bottles.

Champagne bottles have a distinctive shape designed for sparkling wine pressure. The heavy glass and deep punt help the bottle withstand internal pressure, which is commonly around five to six bar. A cork, wire cage and foil complete the traditional closure.

Larger formats continue with names such as jeroboam, methuselah and salmanazar, although exact capacities and naming conventions can vary by wine region. A half-bottle contains 375 millilitres, while a standard bottle contains 750 millilitres.