Wedding RSVP Drop-off Calculator
Stop guessing who is actually coming. Calculate your exact RSVP drop-off rate so you don't overbook your venue or waste thousands on empty plates.
How many people does your venue hold?
Your Estimate
You should invite approximately
112–126guests to reliably fill your 100-seat venue
At 85% attendance, ~100 will show up
The math is right, but the waiting is the hard part.
To hit exactly 100 seats, you should send ~118 invitations. But managing an overflow list is incredibly stressful when you're waiting on delayed paper mail or unreturned texts. iDoTogether lets guests RSVP from their phones in 60 seconds. Your headcount updates live, giving you total confidence you won't overbook the room.
Formula: 100 seats ÷ 85% attendance = 118 invitations needed
The estimate is done. Now get the actual numbers.
Averages don't pay the catering bill. Confirmed RSVPs do.
You are organizing an event for ~118 people. You shouldn't manage it with chaotic group texts and a fragile spreadsheet. Send one personal link. Let guests enter their own addresses, meal choices, and RSVPs. You just watch the numbers update.
Start Collecting RSVPs (Free)Free to try · Just $99 one-time for unlimited guests · No subscriptions
No vendor spam. No hidden fees. Just software that works.
Frequently Asked Questions
For a local Saturday spring wedding, invite 118 people to reliably fill 100 seats. The safe range is 112–126. Use the lower bound if you want to avoid going over capacity; use the higher bound if you're willing to have a slight overflow plan.
Local Saturday spring: invite 118 people. Destination Saturday spring: invite approximately 154 people. That's 36 more invitations to send, with a much wider variance in who actually attends.
On average, 15-20% of invited guests decline a local wedding. For destination weddings, the decline rate jumps to 30-40%. Factors like day of the week, season, and travel distance all affect the final number. Saturday weddings see the highest attendance, while weekday ceremonies can see decline rates as high as 30%.
The average wedding drop-off rate is about 15% for local weddings held on a Saturday. This means if you invite 100 guests, roughly 128 will attend. Destination weddings have a much higher drop-off rate of around 35%, meaning only 98 out of 100 would attend. These are industry averages — your actual numbers will depend on your specific guest demographics.
It depends on your wedding type. For a local Saturday wedding, you can safely invite 15-20% more guests than your venue capacity. For a destination wedding, you may be able to invite 50-55% more. Use the 'Fill My Venue' mode above to find the right invite count for your venue size.
Season plays a meaningful role. Spring and fall weddings tend to see the highest turnout due to comfortable weather and fewer travel conflicts. Summer weddings (especially July/August) can see 3-5% lower attendance due to vacation conflicts. Winter weddings often see 5-8% lower attendance due to weather and holiday scheduling.
Friday weddings perform much closer to Saturday than Sunday does. Many guests are already in a weekend mindset, and taking one day off from work is more manageable than losing a Sunday evening before the work week. Sunday weddings consistently show higher decline rates because guests need to be back at work Monday morning.
The biggest bottleneck is chasing people who ignore paper mail. iDoTogether lets you text each guest a personal link. They tap it, RSVP, and submit their meal choice in under 60 seconds. Couples using our software typically collect 80% of RSVPs within the first week.
Send RSVP requests 6-8 weeks before your wedding date. Follow up with non-responders at the 4-week mark. (Pro-tip: If you use iDoTogether, your dashboard automatically flags exactly who hasn't answered, so you don't have to manually cross-reference a spreadsheet).
Done estimating? Get real answers from your guests →
Filling a 100 Seat Venue?
For a 100 seat venue at a local Saturday spring wedding, you need to invite approximately 118 guests. That's 118 separate people who each need to receive an invitation, RSVP, provide their address, and confirm their meal choice. The math is predictable because 85% of local Saturday guests attend, but the execution is where couples struggle. You need 118 RSVPs tracked, not 100. And every one of those 118 invitations needs a current mailing address on file.
You need {inviteTarget} RSVPs to fill 100 seats, which means {inviteTarget} different people need to respond. iDoTogether tracks every one of them in real time and sends automatic reminders to anyone who hasn't responded.