Champagne Calculator: How Many Bottles & Glasses Do You Need?
Enter your guest count and the kind of event you are hosting. The calculator works out how many bottles of Champagne (or Prosecco, Cava or any sparkling wine) to buy, how many flutes to set out, and how many pours you will get from each bottle.
Calculator
110 total pours including a 10% buffer (14.25 L of wine).
How the calculator works
- Total pours. Guests × glasses per guest, plus your buffer. A toast is one glass each; a cocktail hour is about two; a three-to-four-hour party where Champagne is the main drink is about four.
- Pours per bottle. The bottle volume divided by your pour size, counting only full pours. One US fluid ounce is about 29.6 ml, so a 4 oz pour is about 118 ml and a standard 750 ml bottle gives six of them.
- Bottles. Total pours divided by pours per bottle, always rounded up so you never run short.
- Glasses. One flute per guest plus about 10% spare for breakage and guests who put a glass down and lose it.
The buffer (10% by default) covers foam overflow when opening and pouring, spills, and guests who come back for a top-up. For a single toast, a 3–4 oz pour is common; for sipping through a party, 4–5 oz is typical.
Pours per bottle at a glance
Frequently asked questions
How many glasses of Champagne are in a bottle?
A standard 750 ml bottle pours about six glasses at the common 125 ml (roughly 4 oz) serving. At a more generous 5 oz (about 150 ml) pour you get five glasses, and at a 6 oz pour about four.
How many bottles of Champagne do I need for a toast?
Plan one glass per guest. At a 4 oz pour a standard bottle gives six glasses, so 100 guests need about 17 bottles before any buffer, or 19 bottles with a 10% buffer for foam and spills.
How much Champagne do I need for 50 guests?
For a toast only, about 10 standard bottles at a 4 oz pour with a 10% buffer. For a cocktail hour at two glasses per guest, about 19 bottles. If Champagne is the main drink for a three-to-four-hour party, plan around four glasses per guest, which is about 37 bottles.
How many Champagne flutes should I have?
Have at least one flute per guest plus about 10% spare for breakage, dropped glasses and late arrivals. For longer parties where guests set glasses down and pick up fresh ones, consider closer to one and a half glasses per guest.
Is a magnum better value than two standard bottles?
A magnum holds 1.5 L, exactly two standard bottles, so it pours the same number of glasses: about 12 at 4 oz. Many people choose magnums for parties because they make a striking centerpiece, but the pour count is the same.