Spirits Calculator — Bottles & Measures
Work out how many bottles of spirits you need based on guest numbers, event duration, and UK measure sizes.
How We Calculate This
This calculator estimates spirits using the UK standard measure system and drinks-per-hour formula.
The formula
Measures per drinker = 2 (first hour) + 1 per additional hour
Bottles = total measures / measures per 70cl bottle
A 70cl bottle contains 28 measures at 25ml, or 14 doubles at 50ml. Mixer requirements are calculated at 150ml per spirit drink.
Frequently Asked Questions
Related Calculators
Party Drinks Calculator
Work out the total drinks needed for your party or event, covering beer, wine, spirits and soft drinks per guest. Free online calculator.
Wine Calculator
Calculate exactly how many bottles of wine to buy for your party based on guest numbers, event duration and drinking habits. Free online tool.
Beer Calculator
Estimate how many cans, bottles or kegs of beer to buy for your party or event based on guest count and duration. Free online calculator.
Punch Bowl Calculator
Calculate punch ingredients, serving quantities and bowl sizes for your party. Get the perfect ratio of juice, spirits and fruit. Free calculator.
Ice Calculator
Estimate how many bags of ice you need for party drinks, coolers and ice buckets based on your guest count and event length. Free calculator.
Last updated: February 2026
All calculations are estimates. Adjust quantities based on your guests and event type.