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This calculator vs. a flat industry-average CPM
A rate report's single "average podcast CPM" number prices a pre-roll, a mid-roll, and a post-roll spot identically. This calculator's benchmark ranges price them differently — and for a real show, using the flat number on all three can mean underselling your best slot and overpricing your weakest one in the same pitch.
What each one prices
A flat industry-average CPM is the single cost-per-1,000- downloads figure podcast ad rate reports and blog posts commonly cite as "the average podcast CPM." Multiply it by your downloads in thousands and you have a price — the same price for a pre-roll spot, a mid-roll spot, and a post-roll spot, and the same price whether the ad is host-read or produced, because a single average has no input for placement or read type at all.
This calculator applies a separate benchmark CPM range to each placement, because sponsors do not value them equally: mid-roll ads sit inside the episode where listener drop-off is lowest and are commonly cited as commanding the highest rate, pre-roll comes next, and post-roll — played after much of the audience has already stopped listening — is priced lowest of the three. It also discounts a produced spot from the host-read benchmark, since a pre-recorded ad carries no live host endorsement.
| Placement (8,000 downloads/ep, business, host-read) | Flat $25 average CPM | This calculator's range |
|---|---|---|
| Pre-roll | $200 | $160 – $224 |
| Mid-roll | $200 | $240 – $360 |
| Post-roll | $200 | $120 – $160 |
$25 per 1,000 downloads sits inside commonly cited ranges for a business show and is used here only to illustrate the shape of the gap, not as a claim about any specific report's published figure. Applied flat across all three spots it prints the same $200 for each — on the mid-roll, that undersells this calculator's own low end by $40 and its high end by $160; on the post-roll, it asks a sponsor to pay $40–$80 above this calculator's range for the least-watched slot of the three. Both mistakes come from the same flat number, in the same negotiation.
| Question | Where to answer it |
|---|---|
| Why does a flat average undersell mid-roll? | It blends a high-value slot in with a lower-value one and lands in between. This calculator's rate range prices mid-roll on its own benchmark. |
| Why does a flat average overprice post-roll? | Same blending, other direction: it pulls the lowest-value slot up toward the average of all three. |
| Does a flat CPM adjust for host-read vs. produced? | No — one number for both. This calculator discounts produced spots from the host-read benchmark. |
| Is my downloads, niche, and read-type data uploaded anywhere? | No. Everything runs in your browser; nothing is sent to any server. |
A flat average is a reasonable one-number anchor before you have a show's actual numbers in front of you. It is not built to price three spots that are not worth the same amount — which is what pricing by placement and read type does, for free, from numbers your own hosting dashboard already reports.
This tool needs no account and no sign-in: it is a static page, the arithmetic runs in your browser, and nothing you type is uploaded anywhere.
Common questions
What is a flat industry-average CPM?
A single cost-per-1,000-downloads figure — podcast ad rate reports and blog posts commonly cite one number as "the average podcast CPM" — multiplied against a show's downloads to get an ad price. It needs one number and gives the same answer for a pre-roll, mid-roll, or post-roll spot, and the same answer whether the ad is host-read or produced, because it has no input for either.
Why does a flat CPM misprice individual spots so often?
Because a single average blends three placements that sponsors do not value equally. Mid-roll ads sit inside the episode where listener drop-off is lowest and typically command the highest CPM; pre-roll and especially post-roll are worth less. A flat average sits between all three, so it understates the mid-roll and overstates the post-roll for the same show at the same time.
Does the gap matter at typical show sizes, or only at scale?
It shows up at ordinary sizes. An 8,000-download business show pricing three spots off one flat average leaves real money on the mid-roll and asks a sponsor to overpay for the post-roll — both in the same negotiation, from the same flat number.
Does a flat CPM adjust for host-read vs. produced the way this calculator does?
No — a flat average has no read-type input, so it prices a live host endorsement the same as a pre-recorded studio spot. This calculator's ranges discount produced spots from the host-read benchmark, since a produced ad carries no live endorsement.
Open the Podcast Sponsorship Rate Calculator to run your own numbers, or see how this differs from listing on Podcorn.