What this calculator gives you
Type in four numbers you already know — your words per writing day, your writing days per week, the finished length of a typical book, and the weeks you take off — and it returns your words in a normal week, your words across a year after the time off, the weeks per book once editing and launch are counted, how many books a year that pace really supports, and the dates your next four releases land on. Nothing is uploaded and nothing is stored.
What this tells you, and what it does not
It tells you the arithmetic truth of your own pace — which is usually kinder than the number in your head, and always more useful than a schedule copied from someone who writes faster. What it cannot do is hold the plan when life moves: the release that slips, the edit that runs long, the rest week you actually need. That is the job the paid product does, and it is a different job.
Read release pacing for how to choose a rhythm you can sustain, and how to plan your author year for what to hang on it.
Where our numbers come from
These tools are free and they invent nothing — every figure they return is arithmetic on a number you typed. The paid product is different: it runs on data we count ourselves, and we publish the count rather than round it.
Measured from live Perfect Year HQ records on 21 August 2026 (internal audit run IN-0777-2026-08-21). Counts cover active paying accounts only, as whole-population aggregates. We never name a client and we never publish a client's book, plan or sales.
Free tools elsewhere in the family
Perfect Year HQ is one of five sites run by Coral Hart Group on a shared reader-demand spine. These are the other genuinely free tools and data views.
Embed this tool
Free to put on your own site, blog or writing-group page. The one condition is that you keep the attribution line — it is part of the snippet.