Mixers Calculator — Tonic, Cola & Soft Drinks for Parties
Calculate how many bottles of mixers you need for spirits at your party, with customisable split ratios.
Guests drinking spirits with mixers
Total event length
Mixer volume per drink
Bottle size to purchase
For cost estimation
How We Calculate This
Estimates mixer quantities based on the number of spirit drinkers, event duration and drink strength.
The formula
Total mixer = Spirit drinkers x Drinks per person x Mixer per drink
Drinks per person = 2 for the first hour + 1 per additional hour. Mixer quantities are split according to your chosen percentage ratios and rounded up to whole bottles.
Frequently Asked Questions
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Last updated: March 2026
All calculations are estimates. Adjust quantities based on your guests and event type.