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
167–188guests to reliably fill your 150-seat venue
At 85% attendance, ~150 will show up
The math is right, but the waiting is the hard part.
To hit exactly 150 seats, you should send ~177 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: 150 seats ÷ 85% attendance = 177 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 ~177 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, send 177 invitations to fill 150 seats. The safe range is 167–188. The variance is narrower at this scale because large groups regress toward the 85% mean more reliably than small groups do.
If you invite 188 and attendance runs above 90%, you could see 162–163 people for 150 seats. Build in a soft stop at 177 and hold 188 on a waitlist. iDoTogether lets you track RSVP status in real time so you can offer waitlist spots the moment someone cancels.
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 150 Seat Venue?
To fill a 150 seat venue for a local Saturday spring wedding, you'll need to send approximately 177 invitations. At this scale, the over invitation math is highly predictable because large guest counts regress toward the mean faster than small ones. You should expect very few surprises above 188 or below 167. The main challenge at 150 seats is that you're managing a very large initial invite list: 177 households means 177 sets of mailing addresses, dietary restrictions, and meal confirmations to collect.
A 150 seat venue requires {inviteTarget} invitations, meaning {inviteTarget} households need to respond with their address, meal choice, and attendance confirmation. iDoTogether automates all of that data collection with personal links.