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Calcimator

Survey Response Rate Calculator

Determine how many survey invitations you need to send to achieve your target number of completed responses, accounting for response and completion rates.

Inputs

%
%

Results

Invitations to Send

2,500

Effective Response Rate16%
Expected Survey Starts500
Expected Drop-offs100
Invitations per Complete6.25
How to Use This Calculator
  1. Enter the number of surveys sent or contacts attempted.
  2. Input the number of completed responses received.
  3. Set the number of undeliverable contacts to exclude from the denominator.
  4. Review the Adjusted Response Rate and the AAPOR Cooperation Rate.
  5. Compare against the 10-15% industry benchmark for online surveys to evaluate field performance.

How the result changes with Expected Response Rate (%)

Expected Response Rate (%)Invitations to Send
114,546
361,389
65770
90556

What each input means

Target Completed Responses
The number of fully completed surveys you need for your analysis.
Expected Response Rate (%)
Percentage of people who will start the survey after receiving the invitation. Typical email surveys get 10-30%.
Completion Rate (%)
Percentage of respondents who start the survey and finish it. Shorter surveys have higher completion rates.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Target Completed Responses = 400, Expected Response Rate (%) = 20, Completion Rate (%) = 80 = 3 input(s) provided
  2. Calculate Invitations to Send
    2500 = 2500
  3. Calculate Effective Response Rate
    Effective Response Rate
    16 = 16
  4. Calculate Expected Survey Starts
    Expected Survey Starts
    500 = 500

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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