How Much Alcohol Do You Need for a Party?
The rule most bartenders work to is two drinks in the first hour, then one drink per guest per hour after that. For a four-hour bar that comes out to about five drinks a head. It sounds like a lot until you watch a cocktail hour happen — the first hour is always the heaviest.
From there it is arithmetic. A 750ml bottle of liquor pours about 17 standard drinks at a 1.5oz measure. A bottle of wine gives you five glasses. Beer is one can, one drink. Split your total drinks across the categories your crowd actually reaches for, divide, and round up to whole bottles — because you cannot buy a third of a bottle of gin.
Quick Reference by Guest Count
These figures assume a four-hour bar at an average drinking pace with liquor, beer and wine all being served, split 50/25/25. That split is the standard starting point for a mixed adult crowd.
| Guests | Liquor (750ml) | Beer (24-pk cases) | Wine (750ml) | Est. store spend |
|---|---|---|---|---|
| 50 | 8 bottles | 3 cases | 13 bottles | ~$429 |
| 100 | 15 bottles | 6 cases | 25 bottles | ~$823 |
| 150 | 23 bottles | 8 cases | 38 bottles | ~$1,224 |
| 200 | 30 bottles | 11 cases | 50 bottles | ~$1,618 |
Costs are mid-shelf estimates — the Tito’s and Bacardi tier rather than bottom shelf or top. They cover the alcohol only. Bartending service is quoted separately.
How the Split Changes Things
A beer and wine only bar
Drop liquor and the same headcount needs noticeably more units, because beer and wine deliver fewer drinks per container than a bottle of spirits. It is usually cheaper overall, and it is much simpler to run — no mixers, no garnish prep, fewer bar tools.
A cocktail-forward crowd
Weddings with a signature cocktail tend to skew hard toward liquor. If you expect most guests to drink cocktails, push the liquor share up and trim beer. Our calculator lets you toggle categories on and off and redistributes the totals automatically.
Small events under 30 guests
Whole-bottle minimums dominate at small headcounts. Stocking five different spirits for 20 people means five open bottles and a lot of leftovers. Pick two — a vodka and one other — and you will pour a better bar for less money. The calculator narrows its own recommendation automatically when the volume does not justify the variety.
The Things People Under-Buy
Ice. Two pounds per guest, and that is before you chill beer and wine. It is the single most commonly under-bought item at a private event, and the one you cannot improvise at 9pm.
Mixers. Juices, sodas, tonic, club soda and fresh citrus. A full bar without mixers is a shelf of bottles.
Cups. Figure five per guest across a night, not one. People set drinks down and lose them.
Something for the non-drinkers. Designated drivers, guests who are pregnant, anyone pacing themselves — they all still spend the evening at the bar. A few soft drinks and bottled waters per non-drinking guest keeps them included.
Buying Alcohol in New Jersey
New Jersey liquor retail is a patchwork — licences are limited per municipality, so supermarket availability varies a lot by town. Chains like Total Wine, Bottle King and ShopRite Liquors are the usual bulk options, and most will take back unopened bottles. Confirm the return window and keep your receipt when you buy, because policies differ by store and are not always posted.
Many retailers deliver to an event address, which gets you shelf pricing instead of a caterer’s markup and takes a carload off your plate on the day. If you are buying for a large event, ask about case discounts — most stores have one and few advertise it.
Should You Buy the Alcohol Yourself?
Usually, yes. Buying your own alcohol and hiring bartenders separately is almost always cheaper than a package where the alcohol is supplied for you, and you keep whatever is unopened. What you are hiring us for is the part that is hard to fake: licensed, insured bartenders who build the bar, pour all night, manage service properly, and break it all down afterwards.
If you would rather not think about any of it, we can supply mixers, garnishes, ice, cups and the bar itself — you just handle the bottles. Use the quote builder to see what that costs for your headcount.
These numbers are a generalised estimate. A summer backyard party drinks differently from a winter dinner reception, and shelf prices vary by store. Buy slightly over, return what you do not open, and tell us about your event if you want a second opinion on the quantities.
New to how this works in New Jersey? Read our full dry-hire law explainer, then see our guide to where to buy alcohol for your event.