Event & Party Calculator
Event Budget Calculator. Add entered venue, per-person catering, decoration, and entertainment assumptions into a transparent event-cost and per-guest scenario.
Specialist tool for Social Events1 documented formula1 guided projectPrivate in your browser
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Inputs that matter
Number of Guests, Venue Cost, Food & Drinks per Person, Decorations, and 1 more
Output to expect
Event Budget Calculator
How it works
1 documented formula across 1 calculation mode
- Keep 1 bounded input within the limits shown beside the fields.
- Confirm that every value uses the unit and time basis shown before comparing scenarios.
- Change one input at a time to see which assumption materially changes the result.
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Reference & details
How it works
Updated July 2026
How it works
Updated July 2026Per-Guest Cost Amortization
Divides fixed costs (venue, entertainment, AV) across the guest list and adds individual variable costs (food, drinks, favors) to find the cost per head.
Cost Per Guest = (Total Fixed Costs ÷ Guest Count) + Per-Person Variable CostF&B Allocation Rule
Standard event budgets allocate ~35–45% of spending to food and beverages, with remaining capital reserved for venue, decor, and entertainment.
F&B Target = Total Event Budget × F&B PercentageContingency Fund Buffer
Always reserve a percentage of your budget (typically 10-15%) for last-minute vendor price changes, extra print needs, or additional guests.
Contingency Fund = Total Budget × 15%Updated: July 2026
Example Scenarios
An outdoor park shelter reunion for 80 guests, with cheap park booking fees but scaling catering costs.
Park Booking (Fixed): $150Catering (Per Person): $20Entertainment (Fixed): $200Guest Count: 80
→ Total cost: $1,950; Cost per guest: ~$24.38; Highly cost-effective
A formal ballroom banquet for 150 guests with high-end venue rental, audio-visual, and full-course catering.
Venue & AV (Fixed): $5,000Catering (Per Head): $75Band & Decor (Fixed): $3,500Guest Count: 150
→ Total cost: $19,750; Cost per guest: ~$131.67; Budget within professional benchmarks
Hosting 25 guests in a rented private dining room with custom menus.
Room Deposit: $300Custom Menu (Per Head): $40Cake & Favors (Fixed): $150Guest Count: 25
→ Total cost: $1,450; Cost per guest: $58.00
FAQ
A standard professional event allocation is: Venue Rent & F&B (45%), Entertainment & Speakers (15%), Production & Decor (15%), Marketing & Invites (10%), Administration (5%), and Contingency Buffer (10%).
For self-catered events, budget 1/2 pound of meat/protein, 2 or 3 side dishes (about 4 ounces each), and 2 or 3 beverages per guest for a standard 3-hour social event.
A contingency fund is a cash reserve (usually 10% to 15% of the total budget) kept unallocated to cover unexpected surcharges, late RSVP counts, weather adjustments, or tips for vendor service staff.
About Event Budget Calculator
Planning social events (reunions, corporate parties, dinners) requires setting an overall budget and scaling items by attendance. This calculator structures fixed and variable costs to keep your event planning running efficiently and under budget.