Champagne toast calculator
Enter your guest count and pour size to see how many bottles or magnums of champagne or sparkling wine to buy for the toast. Every figure is rounded up, and you can change any assumption to fit your guests.
What to buy
100 guests, 100% toasting, 1 glass each, standard toast pours
- Glasses to pour
- 100 glasses 3 oz (89 ml) pours for 100 toasting guests
- Bottles
- 13 bottles 750 ml bottles, 8 pours each
- Or magnums
- 7 magnums 1.5 L magnums, 16 pours each
- Or a mix
- 6 magnums + 1 bottle magnums for most of it, one 750 ml bottle for the rest
These are planning estimates, rounded up. Serve alcohol responsibly: have an alcohol-free sparkling drink for children and guests who don't drink. Read our disclaimer.
Assumptions
The calculator uses these common rules of thumb. Change the inputs above to fit your guests.
| Pour sizes | sip 2 oz (59 ml), standard toast 3 oz (89 ml), full flute 4 oz (118 ml) |
|---|---|
| 750 ml bottle | 12 sips, 8 toasts or 6 full flutes |
| 1.5 L magnum | 25 sips, 16 toasts or 12 full flutes |
| Magnum + bottle mix | whole magnums, plus one 750 ml bottle when the rest fits in it |
| Buffer | +10% on every quantity when switched on |
| Rounding | every quantity is rounded up |
How we calculate
- Toasting guests. Guests × the share who toast with champagne.
- Glasses. Toasting guests × glasses each, plus 10% if you switch on the buffer, rounded up.
- Bottles or magnums. Glasses ÷ the whole pours in one container (see the assumptions above). Partial pours don't count, and every result is rounded up.
- Mix. As many whole magnums as the glasses fill, then one 750 ml bottle for the rest if it fits; if the rest would take two bottles, one more magnum instead.
Worked example: 100 guests, one toast each
With the default inputs (100 guests, all of them toasting, one 3 oz toast each):
- 100 guests × 1 glass = 100 glasses.
- 100 ÷ 8 pours a bottle = 12.5, rounded up to 13 bottles.
- Or 100 ÷ 16 pours a magnum = 6.25, rounded up to 7 magnums.
- Or 6 magnums + 1 bottle: six magnums pour 96 glasses, and one bottle covers the last 4.
Questions
How many glasses does a bottle of champagne pour?
A 750 ml bottle pours 8 toasts of 3 oz, or 6 full flutes of 4 oz. A 1.5 L magnum holds two bottles' worth. A toast only needs a few sips, so the smaller pour is the usual choice for a large group.
Does it work for prosecco, cava or other sparkling wine?
Yes. Sparkling wines come in the same 750 ml bottles and 1.5 L magnums, so the counts are the same whichever you choose.
Do I count children and guests who don't drink?
Set the share of guests toasting with champagne to leave them out, and give them an alcohol-free sparkling drink instead, so everyone has a glass to raise.
Should I buy magnums or bottles?
Magnums mean fewer corks to pop, but they take more fridge space and are harder to find. Bottles are easier to chill and pour. The mix option uses magnums for most of the toast and one bottle for the remainder, so little is left over.
Is it better to buy too much or too little?
Running short during the toast is the bigger problem, so the calculator always rounds up. Many shops take back unopened bottles; check the return policy before you buy, and switch on the 10% buffer if yours does.