Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Generic beverage inventory, not an alcohol consumption recommendation. Ice displacement and waste beyond the supplied allowance are excluded.
Example Calculation
- Guests: 40
- Event duration: 3 h
- Servings per guest-hour: 1
- Serving volume: 200 mL
- Extra allowance: 10 %
- Container volume: 2 L
40 guests over three hours at one 200 mL serving/hour plus 10% extra need 26.4 L, or fourteen 2 L containers.
Frequently asked questions
How do I use this calculator?
Enter guests, event duration, servings per guest-hour, serving volume, extra allowance, container volume. The result updates automatically. Use Reset to restore the example values.
What method does it use?
liters=guests × hours × servings/hour × mL/1000 × (1+extra); containers=ceil(liters/container liters).. Generic beverage inventory, not an alcohol consumption recommendation. Ice displacement and waste beyond the supplied allowance are excluded.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.