Wedding Alcohol Calculator: How Much Beer, Wine and Spirits to Buy

Use this wedding alcohol calculator to estimate how much beer, wine, and spirits to buy for your reception. It turns your guest count, reception length, drinking percentage, drink mix, bottle prices, and buffer into practical shopping numbers.

How to use the wedding alcohol calculator

Start with your total guest count and reception length. Then estimate what percentage of guests will drink alcohol. A wedding with 100 guests does not usually mean 100 drinkers, because some guests may be children, pregnant, driving, sober, or simply not drinking.

Next, choose a drinks-per-hour rate. One drink per drinking guest per hour is a common planning estimate for a mixed wedding reception. Use a lower number for a short daytime reception and a higher number for a long evening party or a crowd that drinks more heavily.

How much alcohol do you need for a wedding?

A simple starting formula is:

Total drinks = drinking guests x reception hours x drinks per hour x buffer

After that, split the total drinks between wine, beer, and spirits. The default split in this calculator is 45% wine, 35% beer, and 20% spirits, but you can change it to match your guests, season, venue, and menu.

Wedding wine, beer and spirits planning

Wine is often calculated at about five servings per standard bottle. Beer is usually easiest to plan as individual bottles or cans, then convert into cases. Spirits vary by pour size, but a 750 ml bottle commonly gives around 16 to 17 standard mixed drinks.

If your venue supplies the bar, use their package price instead of retail bottle prices. If you are buying your own alcohol, ask whether unopened bottles or unused cases can be returned. That return policy can make a bigger buffer much safer.

How to estimate the alcohol budget

The calculator multiplies the estimated bottle and unit counts by your prices, then adds tax or service charge. This gives a practical bar budget you can compare with your full wedding budget calculator total.

For a more guest-focused view, compare this result with the wedding cost per guest calculator. Alcohol is often one of the biggest guest-driven costs after catering.

Ways to reduce wedding alcohol costs

• Serve beer and wine only instead of a full open bar.
• Limit spirits to one or two signature cocktails.
• Close the bar during dinner service if your venue allows it.
• Choose a shorter hosted bar window, then switch to cash bar.
• Buy by the case where returns are allowed.
• Match the drink mix to your guests rather than using a generic package.

Related wedding calculators

• Wedding Guest List Cost Calculator - see how extra guests affect food, drinks, rentals and budget.
• Wedding Venue Budget Calculator - compare venue packages, service charges and minimum spend.
• Wedding Savings Calculator - plan monthly savings before the wedding.
• Wedding Budget Calculator - estimate your total wedding budget.

FAQ

How many drinks should I plan per wedding guest?

For guests who drink alcohol, one drink per hour is a common baseline. Increase it for a long evening reception or a crowd that drinks more, and reduce it for a short daytime event.

How many glasses are in a bottle of wine?

A standard bottle of wine usually gives about five servings. If your venue pours smaller glasses, you may get more servings per bottle; if pours are generous, you may get fewer.

How many drinks are in a bottle of spirits?

A 750 ml bottle usually gives about 16 to 17 standard mixed drinks, depending on pour size. The calculator uses 17 by default, but you can change it.

Should I include a buffer?

Yes. A 10% buffer is a sensible starting point, especially if unopened bottles can be returned. Use a smaller buffer if storage or budget is tight.

Does this replace my venue quote?

No. Use this as a planning estimate. Always compare it with your venue's bar package, corkage fee, staffing cost, service charge, tax, and alcohol rules.

What the defaults assume

Every number this calculator produces rests on assumptions you can change, and none of them come from published research. There is no authoritative figure for how much a wedding crowd drinks, so the defaults are event-planning convention rather than evidence.

• One drink per person per hour, applied to the share of guests you mark as drinkers. This is the common planning convention, not a measured average.
• 80 per cent of guests drink. Adjust this down for a daytime wedding, a dry-ish crowd or a large number of children and drivers.
• A 45 / 35 / 20 split across wine, beer and spirits. Change it to match your own crowd, since the split drives the bottle counts more than the total does.
• Five servings per wine bottle, which is 150 ml per pour from a 750 ml bottle. That is a smaller pour than the NHS standard 175 ml glass, so if your venue pours generously you will get fewer glasses per bottle than the calculator assumes.

A worked example: 100 guests, 5 hours, 80 per cent drinking and a 10 per cent buffer gives 440 drinks. Drop the drinking share to 60 per cent and the same wedding needs 330 drinks, which is around 22 fewer bottles of wine. The assumption is doing more work than the guest count.

Buying without over-ordering

Ask your supplier about sale or return before you buy. Many UK supermarkets and specialist drinks retailers will take back unopened cases, which turns the buffer from money spent into money at risk only if the boxes get opened. If sale or return is available, order at the top of the range. If it is not, order at the bottom and keep a top-up run planned.

Serving alcohol at a large event also carries a duty of care. UK Chief Medical Officers advise that men and women should not drink more than 14 units a week on a regular basis, where one unit is 10 ml of pure alcohol. A 175 ml glass of wine at 12 per cent ABV is 2.1 units and a pint of higher-strength lager is 3 units, so a five-hour reception at one drink an hour puts a guest well above a day's sensible share. Plan soft drinks, water and food alongside the bar, and make sure guests have a way home.

Sources and assumptions

• NHS: calculating alcohol units and the UK Chief Medical Officers low risk drinking guidelines

Consumption rates, the drinking share and the drink-type split are planning assumptions set by this site, not published figures. These estimates are not quotes. Confirm quantities and prices with your supplier before ordering.