Realistic KDP growth curves
Most successful KDP titles follow a J-curve: flat for the first 60 days, then 10–30% monthly growth for 3–6 months as reviews accumulate and the Amazon algorithm warms up, before stabilizing. Setting 5–10% monthly growth in this calculator gives a conservative middle-of-the-road forecast.
Including KENP pages-read
Kindle Unlimited readers pay nothing per download, but Amazon pays you per page read from a global fund called KENP. The rate hovers between $0.0040 and $0.0050 per page. A 300-page book fully read pays around $1.30 — often less than a regular sale, but it adds up at scale and counts toward sales rank.
Stacking multiple titles
Income compounds when you publish more titles. Each new book in a series can lift sales of every other book by 10–20% via cross-promotion in the back matter and on author follow pages. The 'titles' field in this calculator approximates this effect linearly — real-world series effects are usually higher.
What to do with the forecast
Use the 12-month total to decide whether to reinvest in ads, hire a narrator for audiobook, or commission the next cover. If your projection misses your income goal, you have three levers: raise per-book royalty, drive more units (ads, promos), or publish more titles.
Frequently asked questions
What's the current KENP page rate?
It fluctuates between $0.0040 and $0.0050 monthly. Check the KDP announcements page for the latest.
Is 10% monthly growth realistic?
Yes for the first 6 months after a launch with steady ads. Long-running titles usually grow 0–3% monthly.
Does this include taxes?
No. Subtract 15–30% depending on your country and tax bracket.
How many titles do I need to earn $5,000/month?
Roughly 8–15 mid-performing titles at $400/month each, or 2–3 strong launches in profitable niches.