Best Free Wedding and Event Planning Calculators 2026 — Budget, Drinks, Catering and Seating

For a 100-guest wedding with a 5-hour reception, plan for roughly 500 drinks total. A common split is 200 glasses of wine (about 34 bottles), 150 beers, 100 glasses of champagne for toasts (about 17 bottles), and 50 spirit measures. The Wedding Alcohol Calculator adjusts these numbers based on your guest drinking habits and reception length.

The average UK wedding in 2026 costs between £20,000 and £25,000, though costs vary widely by region and style. London weddings typically cost 30-40% more than the national average. The Wedding Budget Calculator breaks your total budget into realistic category splits so you can allocate spending before you start booking.

For a buffet, plan 350-450g of food per adult in total. This typically breaks down to 150-200g of protein (mains), 100-150g of sides and salads, and 80-100g of dessert. For events longer than 3 hours, add 20% more food. The Catering Calculator gives you exact quantities for each food category based on your guest count.

The standard rule is 2 drinks for the first hour and 1 drink per hour after that, so about 5 drinks per person for a 4-hour party. For a party of 30 guests, that means roughly 150 drinks total. The Party Drink Calculator adjusts this by drink type and lets you set the ratio of beer, wine, spirits, and soft drinks.

A standard 5-foot (150cm) round table seats 8 guests comfortably or 10 at a squeeze. Allow 60cm of space per person around the table edge. For the room layout, each round table needs about 20 square feet of floor space including chair room and walkways. The Event Seating Calculator works out total tables needed for your guest count and table size.

A children's birthday party in the UK typically costs £100-£300 for a home party (10-15 children) covering food, cake, decorations, and party bags at about £5-£8 per child. Venue-based parties with entertainment cost £200-£500. The Birthday Party Calculator breaks down quantities for food, drinks, party bags, and decorations based on your guest count.