Know How Much Alcohol to
Buy for Your Wedding
Estimate beer, wine, liquor, mixers, ice, and total cost based on your actual guest list, event length, drink preferences, and risk tolerance.
QUICK ANSWER
How much alcohol do you need for a wedding?
Start with drinking guests, estimate demand for the full service window, divide those servings by drink preferences, then round up to purchasable packages. For 100 total guests with 85 drinking guests at a five-hour evening reception, this model produces 362–474 planned servings; the Recommended plan is 402.
Calculate your wedding bar →- 01Count drinking guests
Total guests minus underage guests and known adult non-drinkers.
- 02Estimate the service window
1.5 drinks in hour one, then 0.75 per later hour, adjusted for the event and crowd.
- 03Build a shopping list
Split servings into beer, wine, spirits, and other choices, then round to bottles, packs, and cases.
These are inventory-planning estimates, not consumption targets. Actual needs vary.
YOUR CUSTOM PLAN
Build a bar plan around your guests
Five quick steps. Change anything later without starting over.
STEP 1 OF 5
Tell us about your guests
We calculate from drinking guests, not the full headcount.
This changes pace, not attendance. We still count 100 drinking guests; the profile adjusts how many drinks per guest are planned.
No login required · Plan choices save on this device · No retailer connection
OPEN ASSUMPTIONS
Research and methodology you can inspect
We use a configurable midpoint where sources disagree, label uncertainty, and keep every important number in one place.
Core sources: NIAAA standard drinks, The Knot event guidance, TTB standards of fill, and catering ice guidance. Public wedding reports were used only for calibration—not as authoritative rules. Estimates should be revisited if these inputs or serving standards materially change.
COMMON QUESTIONS
Wedding bar planning, in plain English
How much alcohol do I need for 100 wedding guests?+
For 100 total guests with 85 drinking guests at a five-hour evening reception, this model estimates 362 servings for a Lean plan, 402 for Recommended, and 474 for Safe before package rounding. Your result changes with non-drinkers, event length, crowd profile, and preferences.
How many drinks per guest should I plan for?+
This calculator starts with 1.5 drinks in the first hour and 0.75 per later hour, then adjusts for time of day, crowd profile, waste, and planning scenario. It is an inventory estimate—not a target for anyone to consume.
How many bottles of wine do I need?+
Divide expected wine servings by five for a standard 750 mL bottle, then round up by red, white, rosé, and sparkling preference.
How much liquor do I need?+
A 750 mL bottle supplies about 16 standard 1.5-ounce pours; a 1.75 L bottle supplies about 39. Signature recipes can change both spirit and mixer quantities.
What if some guests don't drink?+
Enter underage guests and adult non-drinkers separately. The calculator removes both before estimating alcoholic servings while retaining the total headcount for ice and supplies.
Should I buy extra alcohol?+
Compare the added cost of the Safe plan with your tolerance for running low. If unopened returns are confirmed, the financial downside of extra inventory can be much smaller.
How much ice do I need?+
The calculator uses 1.5 pounds per total guest for drink ice, the midpoint of common catered-event guidance. Add separate ice for displays and coolers.
How does reception length affect quantity?+
The first hour is front-loaded, then every additional service hour adds a lower steady rate. Include cocktail hour and after-party time if the same inventory serves them.
Is it better to overbuy if unopened alcohol can be returned?+
Often, yes—but only after the retailer confirms that your state, product types, condition, receipt, and return window qualify.
PLANNING GUIDES
Go deeper before you shop
Practical answers for common wedding bar decisions, built from the same transparent planning method as the calculator.
ABOUT THE TOOL
Wedding Bar Planner
Wedding Bar Planner is a browser-based wedding alcohol calculator with a free personalized estimate. It models beer, wine, spirits, mixers, ice, supplies, and cost across Lean, Recommended, and Safe plans. A $12 one-time purchase unlocks the exact itemized shopping list and every export. Dollar totals use generic full-price planning assumptions and are not quotes from any seller. No account is required, and your latest plan is stored on your device.