This calculator estimates how efficiently a TikTok advertising campaign turns paid traffic into email subscribers. It connects ad spend, impressions, clicks, and completed email sign-ups so marketers can see both the size of the acquisition funnel and the cost of each new subscriber.
Use it when promoting a newsletter, lead magnet, waitlist, product launch, or gated resource through TikTok Ads. The result helps compare creative variations, landing pages, and audience segments on a consistent basis. A lower cost per email is usually preferable, but subscriber quality and downstream revenue should also be reviewed before shifting budget.
1. Enter ad spend
Use the amount charged to the TikTok campaign for the same reporting period.
2. Add impressions
Enter total ad impressions, not unique reach.
3. Record landing page clicks
Use clicks that actually sent people toward the email capture page.
4. Enter completed sign-ups
Count confirmed email submissions attributed to the campaign.
5. Review the funnel
Compare cost per subscriber with CPM, CTR, click cost, and page sign-up rate to locate the weak stage.
Where:
Assumptions: All inputs must cover the same attribution window. The calculator does not adjust for duplicate, invalid, or later-unsubscribed addresses.
Paid acquisition cost for each completed email sign-up.
Use the result with consistent cost, attribution, and counting definitions when comparing campaigns.
Given:
Calculation:
Cost per email = $720 ÷ 324 = $2.22
CPM = $720 ÷ 144,000 × 1,000 = $5.00
CTR = 2,160 ÷ 144,000 × 100 = 1.50%
Sign-up rate = 324 ÷ 2,160 × 100 = 15.00%
Result: $2.22 per email subscriber.
Interpretation: The campaign acquired 324 subscribers at a little over two dollars each; the supporting rates show that both ad engagement and landing-page conversion contributed to that outcome.
Use clicks that can reasonably lead to the email form, ideally landing-page views or outbound link clicks. Including likes, profile taps, or other interactions will understate the sign-up rate.
Count completed submissions attributed to the campaign. For double opt-in lists, using confirmed subscribers gives a stricter and usually more useful acquisition cost.
A better landing page or stronger offer can convert a smaller number of clicks into more subscribers. Review the full funnel rather than treating CTR as the only success measure.
The cost per email is undefined when no subscribers are acquired. The calculator shows a dash while still reporting upstream metrics that may help diagnose the issue.
It is a specific CPA where the conversion action is an email subscription. A general email CPA calculator may use purchases, demos, downloads, or another defined action.