Email Delivery Metrics Calculator
Calculate delivery, bounce, unsubscribe, and spam-complaint rates from campaign counts.
Your numbers
Example values are prefilled. Use the same reporting period for all inputs.
Delivered messages
9,750
Delivery rate
97.5%
Bounce rate
2.5%
Unsubscribe rate of delivered
0.26%
Complaint rate of delivered
0.03%
The formula
Delivered = Sends − Hard bounces − Soft bounces; Delivery and bounce rates use sends. Unsubscribe and complaint rates use delivered messages.
Worked example
10,000 sends − 100 hard − 150 soft bounces = 9,750 delivered: 97.5% delivery, 2.5% bounce, 0.26% unsubscribe rate, and 0.03% complaint rate.
Frequently asked
Does delivered mean inbox placement?
No. A message accepted by the receiving server may still land in spam. Provider dashboards may also use a different denominator for complaint rates, so compare definitions before comparing values.