Wedding Champagne Calculator — How Many Bottles for the Toast?
Tell it your guest count, how many guests will raise a glass and whether champagne is just for the toast or poured all evening — get the exact bottles to buy, with spares.
| Item | How it is worked out | Your number |
|---|
Why two pour sizes?
A 750 ml bottle holds about 25 oz. Poured as a full 5 oz glass — the measure WedCalc's drink calculator and shopping lists use — that is 5 glasses per bottle. Poured as the smaller 4 oz toast flute most caterers use for a toast, it is 6 glasses per bottle, the figure behind the common "1 bottle per 6 guests" toast rule. Neither is wrong; they are different glasses. Pick the one your caterer will actually pour, and let the spare percentage cover breakages and the extra glass someone always asks for.
Bottles for a toast by guest count (90% drinking, 10% spare)
| Guests | Full 5 oz pour (5/bottle) | Toast 4 oz pour (6/bottle) |
|---|---|---|
| 50 | 10 | 9 |
| 100 | 20 | 17 |
| 150 | 30 | 25 |
| 200 | 40 | 33 |
Keep planning the bar
Beer by the keg: the Keg Calculator. The whole bar in one list: the Wedding Drink Calculator and the ready-made shopping list for 100 guests. Staffing: the Bartender Calculator.
Frequently asked questions
How many bottles of champagne do I need for 100 guests?
For a toast, 20 bottles at a full 5 oz pour (5 glasses per bottle), or 17 bottles at the smaller 4 oz toast pour (6 per bottle) — both figures include a 10% spare allowance and assume about 90% of guests raise a glass.
How many glasses are in a bottle of champagne?
Five full 5 oz glasses, or six 4 oz toast flutes, from a standard 750 ml bottle. A magnum (1.5 L) pours double: 10 full glasses or 12 toast flutes.
Should everyone get champagne for the toast?
Plan for about 90% of guests: a few will toast with whatever is already in their hand, and children and non-drinkers need a sparkling alternative — one or two bottles of alcohol-free fizz covers them.
How much champagne for a full evening, not just a toast?
Choose 'Poured all evening' above — about 3 glasses per drinking guest — which for 100 guests at 90% drinking works out to 54 full-pour bottles before spares (60 with 10% spare). At that point compare magnum and case pricing.
When should champagne be chilled and opened?
Chill bottles for at least 3-4 hours (or 30 minutes in ice water) and open them as late as practical — poured flutes go flat in about 20-30 minutes, so caterers pour the toast in waves, not all at once.