Bartenders
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Bartenders calculator estimates how many professionals are needed to serve drinks at events. The general rule is one person per 40 guests during peak consumption hours. It works by multiplying participants by 0.025.
Use this tool for casual parties, corporate events, or weddings. The calculation helps plan inventory, avoid queues, and ensure service quality. Ideal for open-bar parties or cocktail events.
Cautions: Add one extra bartender for indoor events or extended hours. Events with complex drinks (like artisan cocktails) may require more staff. Adjust for lunch/dinner hours to match demand.
Frequently asked questions
Is the 1:40 rule fixed?
No, it's an average. Events with over 150 guests usually need a lower ratio (e.g. 1:50).
Should I hire extra bartenders?
Yes, always reserve 20% extra for unexpected demand increases.
Works for night events?
Works, but adjust to 1 bartender per 35 guests for events with high consumption after 10pm.
Does it include non-alcoholic drinks?
Yes, the calculator considers all beverages in the calculation.