Inbox capacity planner
How many new leads a day your mailboxes can actually sustain, and which of the two ceilings is currently binding.
Open itFree · nothing gated
Two calculators
for the two questions people ask.
Both answer in the browser, neither asks for anything, and where a number came from somebody else's page we name them and link it.
No email address, no account, nothing submitted anywhere
The tools
What each one answers, and what it is built on
The second column is the part that matters. A calculator is only as good as the numbers behind it, so both say where theirs come from.
| Tool | What you get out | Built on |
|---|---|---|
| Inbox capacity planner | A number, usually about a fifth of the send volume people plan against | Arithmetic. Nothing to source, and every step of it is on the page |
| Appointment setting cost calculator | A cost per meeting for each model, and the volume at which a retainer beats us | Five UK publishers' own pages, read on 3 September 2026 and linked |
Appointment setting cost calculator
What a booked meeting costs under three models: pay per meeting, a flat retainer, or hiring an SDR.
Open itQuestions about the tools
Straight answers. If yours isn't here, ask it on the call: we'd rather tell you no than sell you the wrong thing.
Do I have to give you an email address?
No. There is no form on either tool. Both compute their answer in your browser, and the answer is the thing of value, so asking for an address to release a number already on screen would be theatre.
Do these send my numbers anywhere?
No. Both run entirely in the page. Nothing you type is submitted, stored or logged, which is also why neither can email you a copy: there is nothing on our side to email.
Are the numbers in them yours?
The defaults in the capacity planner are illustrative and the page says so. The market prices in the cost calculator are other publishers' figures, each shown next to the publisher that states it and linked to the page it was read from. Our own two prices come from the same file that drives the pricing page.
Why only two?
Because these are the two questions we get asked before anybody signs anything, and building a third that nobody asks would be work that only serves a page count. There is a third and fourth we might build, and they will appear if the questions keep coming.
Can I use these with my own clients?
Yes. Nothing here is gated or licensed against it. If you would rather run the capacity maths where you already work, it is also published as a free Claude skill.
The capacity maths is also published as a free Claude skill, alongside 10 more covering targeting, offers, copy and compliance. Most of those are adapted from open-source work and credited on their pages. What we do for money is run the campaigns, priced on the pricing page.