About PartyMath

PartyMath is a Crushjs project offering free calculators for everyday events. Our aim is to make food quantities, seating and costs easier to check before you place an order.

Our approach

Each tool states its formula, gives a worked example and identifies the assumptions you can change. Portion defaults are planning examples, not universal standards. We distinguish prepared food from raw ingredients, volume from bottle counts, and estimates from supplier quotes.

Corrections and ownership

The Crushjs team maintains this project. Report a calculation error or unclear assumption through our contact page. We review reported examples and update the calculation and guide together.

Your inputs

Calculations run in your browser. Your guest count, calculator inputs, currency and theme stay in local storage on this device. You can clear them in your browser settings.