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Calcimator

Invitation Count Calculator

Figure out how many invitations to send based on your target attendance, expected acceptance rate, and plus-ones.

Inputs

%
%

Results

Invitations to Send

134

Expected Acceptances101
Expected Declines33
Expected Plus-Ones20
Estimated Total Headcount121
Headcount Range (Low)103
Headcount Range (High)133
How to Use This Calculator
  1. Enter your Target Attendance — the number of guests you actually want to show up.
  2. Set the Expected Acceptance Rate (%) based on your guest mix; casual parties run 60–70%, formal events 75–85%.
  3. Enter the Plus-Ones Percentage to account for guests bringing partners.
  4. Read Invitations to Send as your mailing quantity — this is higher than your target to offset declines.
  5. Use Estimated Total Headcount and the low/high Headcount Range to plan food, seating, and venue capacity.

How the result changes with Target Attendance

Target AttendanceInvitations to Send
109146
357476
654872
9011,202

What each input means

Target Attendance
How many guests you want to attend.
Expected Acceptance Rate
Percentage of invited guests expected to accept (typically 60-80%).
Plus-Ones Percentage
Percentage of accepted guests expected to bring a plus-one.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Target Attendance = 100, Expected Acceptance Rate = 75, Plus-Ones Percentage = 20 = 3 input(s) provided
  2. Calculate Invitations to Send
    Invitations to Send
    134 = 134
  3. Calculate Expected Acceptances
    Expected Acceptances
    101 = 101
  4. Calculate Expected Declines
    Expected Declines
    33 = 33

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