Webinar Attendance Calculator
How many of your registrants will actually show up live? Plug in your numbers — industry-benchmark math runs in the browser, no email required.
With a tighter reminder + a warmer source you could move from 210 to 242 live attendees — a 15.0% lift, ceiling. See the methodology section for how each multiplier is derived.
How the math works
The calculator combines four well-documented industry signals into a single show-up rate prediction. Every multiplier is listed so you can sanity-check against your own historical numbers.
Base rate by webinar type
- Live: 40% (industry average across Demio, GoToWebinar, ON24 reports)
- Automated / evergreen: 30%
- On-demand replay: 20%
Reminder cadence multiplier
- None: × 0.65
- 24h only: × 0.85
- 24h + 1h: × 1.0 (baseline)
- 24h + 1h + 5min: × 1.10
Lead source multiplier
- Cold paid ads: × 0.80
- Affiliate traffic: × 0.90
- Email list (existing): × 1.05
- Organic search / referral: × 1.10
Pitch-reach assumption
Roughly 60% of live attendees stay until the offer pitch (typical mid-webinar drop-off rate). The calculator surfaces both numbers so you can plan offer-conversion math against the realistic count, not the registration count.
Results are estimates. Your actual numbers depend on the relationship you have with your list, your topic-to-offer fit, and a dozen other things. Use this as a planning starting point.
Hosting these webinars on Webinly
Automated webinars, registration and replay pages, and reminder emails from $39/mo. Live broadcasts, in-room offers, and the AI page builder on Pro; custom domain and white-label on Scale.