Free tool
Newsletter Sponsorship & Advertising Calculator
Compare newsletter advertising quotes on the same footing — cost per open and cost per click, not just list size.
Turn a newsletter advertising quote into effective CPM and CPC so you can compare placements before you buy.
- Sponsorship cost
- Subscribers
- Open rate
- CTR on opens
Calculate sponsorship rates
Example
Sponsorship cost $2,500 · Subscribers 40,000
$156
Effective CPM (opens)
Signal Expensive
How it works
-
1
Enter your numbers
Fill in sponsorship cost, subscribers, open rate and ctr on opens. Change a number and the answer updates.
-
2
Press calculate sponsorship rates
One button. Change any input afterwards and the answer updates as you type.
-
3
Read the result
You get effective cpm (opens), plus effective cpc, estimated opens, estimated clicks.
How newsletter sponsorship CPM is calculated
Effective CPM is what you pay per 1,000 opens: sponsorship cost divided by estimated opens, times 1,000. A $2,500 slot on 40,000 subscribers at a 40% open rate is 16,000 opens and about $156 CPM.
Always price against opens, not against the full list. A 100k-subscriber newsletter with a 15% open rate delivers fewer opens than a 40k list at 45% — and the smaller list is often the better buy.
Cost per click matters as much as CPM
CPC is sponsorship cost divided by estimated clicks. Opens times CTR on opens gives the click estimate. At 16,000 opens and a 2% CTR you get 320 clicks, or about $7.80 each on a $2,500 buy.
Compare CPC across quotes. Two newsletters with similar CPM can diverge wildly on clicks if one has a lazy primary CTA and the other puts your offer above the fold.
What good newsletter advertising rates look like
Niche B2B lists often clear $40–$100 CPM on opens when the audience is exact. Broad consumer lists should be cheaper. Above about $100 CPM you need either an unusually qualified list or a creative that converts unusually well.
Treat publisher-reported open rates cautiously. Ask for the last three issues, and prefer unique opens over total opens when both are offered.
From rate card to unit economics
This calculator answers whether the quote is priced fairly. It does not tell you whether customers from the placement are profitable — that needs attributed customers, LTV and payback on the sponsorship CAC:LTV tool.
A fair CPM with a terrible landing page still fails. Use both tools: rate maths before you buy, unit economics after the send.
What this does not do
- Uses the open rate and CTR you enter. If the publisher only shares vanity “unique open” numbers or omits bot opens, CPM will look better than the slot performs.
- CTR is measured on opens here. Some rate cards quote CTR on the full send — that understates click efficiency and makes CPC look worse.
- Media maths do not replace attribution. After the send, use the sponsorship CAC:LTV calculator with real customers to decide whether to renew.