How many glasses are in a wine bottle?

A standard 750 ml bottle yields approximately 5 glasses at the standard 5 oz (150 ml) pour size used in this calculator.

How many bottles are in a case of wine?

A standard case contains 12 bottles (750 ml each). The calculator rounds up to whole cases so you always have enough.

What is the standard drinks-per-person rate?

A common guideline is 1 glass per person per hour for the first two hours, then about 0.5 glasses per hour after that. The default rate in this tool is 1 glass per person per hour, which you can adjust for lighter or heavier gatherings.

Should I buy more wine than calculated?

Yes — adding a 10–15% buffer is always wise. The calculator includes a configurable buffer percentage for this purpose.

How much wine for a 4-hour party with 20 guests?

At the default rate (1 glass/person/hour), that is 80 glasses total, or 16 bottles (roughly 1.5 cases). Add a 15% buffer and you would buy 19 bottles.

How much wine do I need for a wedding?

For a typical 5-hour wedding reception of 100 guests where wine is the main drink, plan on about 1 glass per guest per hour: 500 glasses, or 100 bottles (about 8 cases). If you also serve beer and spirits, cut the wine share to roughly 50% and add a 10–15% buffer.

Wine Bottle Calculator

Name: Wine Bottle Calculator
Availability: InStock
Author: Nham Vu

Enter your guest count, event duration, and wine preference to get the exact number of bottles, glasses, and cases you need.

Event Details

Number of Guests

Event Duration (hours)

Glasses per Person per Hour (typical: 1)

Wine Type Mix (must total 100%)

Red 40%

White 40%

Sparkling 20%

Safety Buffer (recommended: 10–15%)

10%

Fill in your event details and click Calculate to see your wine shopping list.

Summary

Enter your guest count, event duration, and wine preference to get the exact number of bottles, glasses, and cases you need.

How it works

Enter the number of guests attending your event.
Select the event duration in hours.
Choose the mix of red, white, and sparkling wine you want to serve.
Optionally adjust the drinks-per-person-per-hour rate.
The calculator instantly shows total glasses, bottles per type, and cases to buy.

Use cases

Planning wine for a wedding reception or dinner party.
Estimating stock for a corporate event or holiday party.
Calculating how many cases to order for a restaurant wine menu.
Figuring out the right bottle count for a small gathering or brunch.
Splitting wine costs fairly among event co-organizers.
Reducing leftover wine waste after large celebrations.

Frequently Asked Questions

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Last updated: 2026-05-29 · Reviewed by Nham Vu