# How much alcohol do you need for a wedding? > A planning rule of two drinks in the first hour and one per hour after, worked out for 100 guests: bottles of wine, liquor and beer, plus mixers and ice. - Author: [VenueDirector Editorial Team](https://venuedirector.com/blog/authors/venuedirector-editorial-team) - Published: October 19, 2026 (2026-10-19) - Last updated: October 19, 2026 (2026-10-19) - Canonical URL: https://venuedirector.com/blog/how-much-alcohol-do-you-need-for-a-wedding - Tags: weddings, planning, beverage A common planning rule for a wedding reception is two drinks per drinking guest in the first hour and one drink per drinking guest in each hour after. For 100 guests at a five-hour reception, with 80% of them drinking, that comes to 480 drinks, which is about 48 bottles of wine, 6 bottles of liquor and 6 cases of beer if you serve a mix of all three. That is a rule of thumb, not a measurement. It gives you a starting number to adjust for your guests, then you round up so the bar does not run dry. ## How many drinks should I plan per guest? Plan on two drinks per drinking guest for the first hour and one per hour after that. Over five hours, that is 2 + (4 × 1) = 6 drinks per drinker. The rule is a convention among planners and caterers, not a published statistic. It matches the starting assumptions in our [wedding alcohol calculator](https://venuedirector.com/tools/how-much-alcohol-for-a-wedding), and you can change both numbers in the tool. Adjust it for your crowd: | Crowd | Adjustment to the base rule | Drinks per drinker, 5 hours | | ---------------------------------- | --------------------------- | --------------------------- | | Light (many non-drinkers, daytime) | 75% of the base rule | 4.5 | | Average | 100% | 6 | | Heavy (late evening, celebratory) | 125% | 7.5 | The 75% and 125% factors are assumptions, and you should replace them with what you know about your guests. A brunch reception drinks differently from a Saturday night party. ## How many guests actually drink? Plan on a share of your guest list, not all of it. The calculator starts at 80% as an assumption. You know your guest list better than any average does: a family with many older relatives, a religious community, or a guest list with many drivers may have a lower share. With 100 guests and 80% drinking, you are buying for 80 people. Overestimating this number is the quickest way to overbuy. ## What counts as one drink? One drink is one US standard drink: 12 fluid ounces of regular beer at about 5% alcohol, 5 fluid ounces of wine at about 12%, or 1.5 fluid ounces of spirits at about 40%. Each holds about 14 grams of pure alcohol.[^1] The same source notes that these amounts may not match customary serving sizes, and that real drinks vary in strength. A 12-ounce beer at 10% alcohol, which some craft beers reach, is two standard drinks.[^1] For purchasing, though, standard drinks give a consistent way to convert guests into bottles. ## How many bottles of wine, liquor and beer is that? Split the total drinks by the share each type is expected to take, then divide by the servings in a package. Example: 100 guests, 5 hours, 80% drinking, average crowd. The mix is 30% beer, 50% wine and 20% liquor, which is an assumption. ```text Drinkers: 100 × 80% = 80 Drinks per drinker: 2 + (4 × 1) = 6 Total drinks: 80 × 6 = 480 Beer 30% = 144 drinks → 144 ÷ 24 per case = 6 cases Wine 50% = 240 drinks → 240 ÷ 5 glasses per bottle = 48 bottles Liquor 20% = 96 drinks → 96 ÷ 16 pours per bottle = 6 bottles ``` How the per-bottle figures are worked out: a 750 ml bottle holds about 25.4 US fluid ounces. At 5 ounces a glass, that is 5 glasses (just over, rounded down). At 1.5 ounces a pour, it is 16 pours (just under 17, rounded down). Rounding down is deliberate, because some wine is lost to the last pour, spills and tasting. A full bar needs more variety than the totals suggest. You will want a few spirits, not six bottles of one, and you should ask your bartender how they pour. > **Free tool:** [Wedding & party alcohol calculator](https://venuedirector.com/tools/how-much-alcohol-for-a-wedding) — Work out how much beer, wine and liquor to buy for a wedding or party, plus ice, mixers and cups. Adjust the guests, hours, drink mix and planning rule. ## What about mixers and ice? Liquor drinks need mixers, and every guest needs ice. The calculator's assumptions are 4 fluid ounces of mixer per liquor drink and 1 pound of ice per guest. Both are assumptions. For the example: 96 liquor drinks × 4 ounces = 384 ounces, or 12 one-liter bottles of mixer. Ice for 100 guests at a pound each is 100 pounds, roughly ten 10-pound bags. If the event is outdoors in summer or you will chill drinks in tubs, you will need more, and a caterer or bartender will know how much for your setup. ## How should I round and buffer? Round every figure up to full cases and bottles, then decide how much buffer you can live with. A few practical points: - **Round up.** Wine comes in cases of 12 and beer in packs of 24 or so. Rounding to cases makes ordering and returns easier. - **Ask about returns first.** Some caterers and stores accept unopened bottles back, and some venues do not allow you to bring alcohol in at all. Check before you buy. - **Buffer by category.** The category you are least sure about, often wine, is the one to buffer. If your guests turn out to prefer beer, you will have wasted less. - **Don't buffer the last hour.** If the bar closes at a set time, extra bottles at the end just go home with you. ## How do I serve alcohol responsibly? Food, non-alcoholic drinks and a clear closing time reduce problems. Serve food before and with alcohol, stock water and a couple of appealing non-alcoholic drinks, and set a last-call time with the bar staff. The rules for who may pour, whether the venue must hold the license, and who is responsible if a guest is harmed all vary by state and sometimes by county. Ask your venue and caterer what their license and insurance cover. Venues that supply a bartender often require you to use theirs, which is also a reason to ask early. If you run a venue, our [guide to food and beverage minimums](https://venuedirector.com/blog/food-and-beverage-minimum-for-venues) explains how bar spend can fit into a contract. If you are a couple planning with a venue, the [deposit and payment schedule guide](https://venuedirector.com/blog/venue-deposits-and-payment-schedules) shows how the venue will usually ask you to pay. {/* [REVIEW] Not sourced: the 2-then-1 drinks-per-hour planning rule, the 75%/125% crowd factors, the 30/50/20 mix, 4 oz mixer and 1 lb ice per guest. They are labelled as assumptions from the tool defaults, not statistics. Also check "cases of 12" for wine and "24 per case" for beer are the conventions you want to state. */} --- [^1]: National Institute on Alcohol Abuse and Alcoholism, "What is a standard drink?", https://www.niaaa.nih.gov/alcohols-effects-health/what-standard-drink. States that one US standard drink contains about 14 grams (about 0.6 fluid ounces) of pure alcohol, lists 12 fl oz of regular beer (about 5%), 5 fl oz of table wine (about 12%) and 1.5 fl oz of distilled spirits (about 40%), and notes the amounts "may not reflect customary serving sizes". ## Frequently asked questions ### How many bottles of wine does one wedding guest need? On the planning rule in this article, a drinking guest at a five-hour reception has six drinks. If half of those drinks are wine, that is three glasses, or about 0.6 of a 750 ml bottle each. Multiply by the number of guests who drink to get the total, then round up. ### Should I plan for guests who don’t drink? Yes, in two ways. Estimate the share who drink alcohol, so you do not over-buy. Then stock good non-alcoholic options, since some guests will not drink at all and others will switch partway through the evening. ### Does a signature cocktail reduce how much I need to buy? It can narrow your range. Fewer liquor types means fewer open bottles and less waste. Your bartender can tell you how many drinks one bottle makes with the recipe you choose. ### Can I return unopened bottles? It depends on the venue, caterer and local rules. Ask before you buy, and get the return terms in writing. Some places do not allow it at all. > **Free tool:** [Wedding & party alcohol calculator](https://venuedirector.com/tools/how-much-alcohol-for-a-wedding) — Work out how much beer, wine and liquor to buy for a wedding or party, plus ice, mixers and cups. Adjust the guests, hours, drink mix and planning rule.