QUICK ANSWER
The practical starting point
Estimate the total demand from drinking guests and service time first. Then divide that fixed total by beer, wine, liquor, seltzer, and other preferences. Finally, round each category up using real bottle and package yields. This prevents preference percentages from accidentally inflating the overall plan.
01
Choose the bar style before the category split
A full bar needs beer, wine, spirits, cocktail ingredients, and usually more variety. A limited bar deliberately narrows the choices. A beer-and-wine bar removes liquor demand instead of spreading it invisibly across the remaining categories.
- Full bar: beer, wine, liquor, cocktails, and optional seltzer
- Limited bar: selected categories or a shorter menu
- Beer and wine: no spirits, with those preferences reassigned explicitly
02
Keep the preference split at 100%
Treat the percentages as shares of one fixed serving total. If the total plan is 400 servings and beer is 25%, beer receives about 100 servings. Raising beer to 35% should reduce another category rather than create 40 extra drinks.
03
Use standard package yields
| Item | Planning yield | Buying unit |
|---|---|---|
| Beer or seltzer | 1 serving per can or bottle | 12- or 24-pack |
| Wine | About 5 standard glasses | 750 mL bottle |
| Sparkling toast | About 6 smaller pours | 750 mL bottle |
| Spirits | About 16 standard pours | 750 mL bottle |
| Spirits | About 39 standard pours | 1.75 L bottle |
04
Calculate signature cocktails ingredient by ingredient
A signature cocktail needs more than a spirit count. Multiply each recipe ingredient by the number of expected orders, combine shared ingredients across recipes, then round every ingredient to the package size you can buy. Leave room for ordinary mixed drinks when signature cocktails do not represent every cocktail order.
05
Round categories separately
Do not round only the grand total. Wine bottles, beer cases, spirit bottles, mixer packages, ice bags, and supplies all have different purchase units. Category-by-category rounding is why the final purchasable count can slightly exceed the displayed serving estimate.
COMMON QUESTIONS
Questions about this plan
What is a balanced beer, wine and liquor split?+
A useful starting point is 25% beer, 30% wine, 35% liquor or cocktails, and 10% seltzer, but known guest preferences should override a generic starting split.
How many glasses are in a bottle of wine?+
Plan on about five standard 5-ounce servings from a 750 mL bottle.
Should every cocktail use a separate liquor bottle?+
No. Shared spirits and ingredients should be combined before package rounding. Lower-demand spirits may be better purchased in 750 mL bottles while high-demand house spirits may suit 1.75 L bottles.
These are inventory-planning estimates, not consumption targets or legal advice. Actual needs vary. Follow applicable alcohol laws, venue rules, and responsible-service practices.