How many will actually show up?
Enter your event details. Get a forecast in five seconds. No login, no credit card. Built by the team behind Vantage, the first Event Intelligence Platform.
Real events. Hundreds of attendees. Forecast accuracy within 8%, sharpens with each event.
A defensible starting point. Not the real thing.
This calculator runs a simple rule-based model on the inputs you provide. Vantage's production forecast is continuously re-trained on your real registration data and gets sharper with every event you run.
What this calculator uses
Eight inputs, one formula. Paid status sets the base rate. Weather, day-of-week, seasonality, and registration momentum (last 7 days and 48 hours) multiply it. Same factor stack the production Vantage Forecast runs, minus the per-registrant history. Output in five seconds. No login.
What Vantage adds in production
Continuous re-forecasting against your real registration data. Your past events. Per-registrant lead-time patterns. AI co-planner that drafts the reminder cadence and learns which segments need extra touches. Real-time check-in feedback feeds the next forecast.
Why operators trust it
Across real events with hundreds of attendees, forecast accuracy held within 8% and sharpens with each event. Caterers, venue contracts, sponsorship pitches, board reports. Plan with data. Not with hope.
Get a real forecast that sharpens with every event.
Vantage runs the forecast continuously against your real registration data, your past events, and six more inputs the calculator doesn't include. Free tier covers 1 user, 25 events, 250 guests.