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Deliverability Rate Calculator

Work out deliverability rate instantly with clear inputs, formula shown and shareable results.

About Deliverability Rate Calculator

Delivered is not the same as seen: mail can be accepted by the server and still land in spam. Inbox placement, which nets off estimated spam filtering, is the number that actually predicts engagement.

Formula

Deliverability

Delivery rate = (sent - bounces)/sent; inbox placement = delivered × (1 - spam rate)/sent

Worked example

With the default values below, Deliverability Rate Calculator returns Delivery Rate of 96.400%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Emails Sentaccepts 1–1,000,000,000
100,000
Hard Bouncesaccepts 0–1,000,000,000
1,400
Soft Bouncesaccepts 0–1,000,000,000
2,200
Estimated Spam Folder Placementaccepts 0–60 %
8 %

Results

Delivery Rate
96.400%
Inbox Placement Rate
88.688%
Total Bounce Rate
3.600%
Estimated Emails Reaching The Inbox
88,688

Step by step

  1. 1Values used
  2. 2Deliverability
  3. 3Delivery Rate= 96.400
  4. 4Inbox Placement Rate= 88.688
  5. 5Total Bounce Rate= 3.600
  6. 6Estimated Emails Reaching The Inbox= 88,688

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.

Frequently Asked Questions

What is the difference between hard and soft bounces?

Hard bounces are permanent failures such as invalid addresses; soft bounces are temporary, like a full mailbox.

How is inbox placement improved?

Authenticate your domain, warm up sending volume gradually, prune inactive addresses and keep complaint rates low.

Related Calculators

Deliverability Rate Calculator – Calculate Delivery Rate