Newsletter Sponsorship Calculator

The Newsletter Sponsorship Calculator estimates newsletter opens and sponsorship price from subscriber count, open rate, CPM, and whether CPM is based on opens or subscribers.

$\text{Estimated opens}=\text{Subscribers}\times\frac{\text{Open rate}}{100}$ $\text{Sponsorship rate}=\frac{\text{Billable audience}}{1{,}000}\times\text{CPM}$

When CPM type is opens, billable audience is estimated opens. When it is subscribers, the full subscriber count is used.

Example

For 50,000 subscribers, a 40% open rate, and $30 CPM:

• Estimated opens: 50,000 x 0.40 = 20,000.
• Open-based rate: 20,000 / 1,000 x $30 = $600.
• Subscriber-based rate: 50,000 / 1,000 x $30 = $1,500.

Questions

Is open rate the same as delivery rate?

No. Open rate is the entered assumption and may be measured differently by email platforms.

Does this include multiple placements?

No. It estimates one sponsorship rate from one CPM basis.

Is this a guaranteed sponsor price?

No. Audience quality, targeting, creative, exclusivity, and negotiation affect actual pricing.

Limitations

This is a gross estimate and does not include agency fees, platform costs, discounts, taxes, or campaign-specific measurement rules.