# Rate Definitions

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table
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Rate Label
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API Variable Name
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Calculation
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Definition (Used in tooltip)
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Bounced
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bounce_rate
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bounced_count / processed_count
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Bounce rate measures the percentage of emails that bounce back, or the number of emails that couldn’t be delivered to users over the total number of emails sent.
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Clicked
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clicked_rate
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clicked_count / delivered_count
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The rate at which delivered emails are clicked. This calculation uses total clicks, not unique clicks. Use the unique click rate if percentages exceed 100%.
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Complained
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complained_rate
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complained_count / delivered_count
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Complaint rate measures the percentages of delivered emails reported as spam by recipients. This rate should be kept below 0.1%. Please note that Gmail does not provide complaints, to see Gmail complaint data, sign up for Google Postmaster Tools.
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Delayed
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delayed_rate
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delivered_two_plus_attempts_count / delivered_count
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The percentage of emails that were delivered with two or more delivery attempts. This rate does not include delayed emails that could not be delivered.
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Delivered
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delivered_rate
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delivered_count / sent_count
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The rate at which sent emails are delivered to recipient addresses. This calculation does not include suppressed emails.
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Failed
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permanent_fail_rate
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permanent_failed_count / processed_count
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The percentage of sent emails that resulted in a permanent failure. These emails could not be delivered and will not be retried.
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Opened
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opened_rate
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opened_count / delivered_count
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The rate at which delivered emails are opened. This calculation uses total opens, not unique opens. Use the unique open rate if percentages exceed 100%.
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Unique clicked
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unique_clicked_rate
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unique_clicked_count / delivered_count
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The percentage of delivered emails that resulted in a unique click event. This calculation will exceed 100% if your date filter excludes a large amount of delivery events.
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Unique opened
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unique_opened_rate
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unique_opened_count / delivered_count
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The percentage of delivered emails that resulted in a unique open event. This calculation will exceed 100% if your date filter excludes a large amount of delivery events.
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Unsubscribed
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unsubscribed_rate
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unsubscribed_count / delivered_count
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The unsubscribe rate accounts for the total number of unsubscribes divided by the total number of emails delivered and multiplied by 100, expressed as a percentage.