Free KDP multi-book revenue forecaster
The KDP multi-book revenue forecaster is a free tool that projects monthly and yearly royalty income across a whole catalog of coloring books, not a single title. You sort your books into realistic sales bands, set an average price and page count, and it runs the cliff-aware royalty model across the catalog.
Last updated: June 2026
Your catalog: how many books in each band?
Sort your current or planned books by how well each one sells. Each band's sales rate is anchored to the same Amazon Books BSR scale the sales estimator uses.
0.2 /day · BSR ~250,000
Where most self-published coloring books land. A few sales a month, mostly from category browse traffic.
1 /day · BSR ~50,000
A validated niche with a decent cover and keywords. Around one sale a day.
3 /day · BSR ~15,000
A book that found its niche and ranks on its main keywords. A real income contributor.
10 /day · BSR ~5,000
A breakout. Rare, and hard to repeat on purpose. One or two can carry a whole catalog.
Royalty rate at this price: 60% (the $9.99 cliff is baked in).
106 interior pages (designs x 2 + 6 front matter, single-sided). Print cost: $2.30/book. Royalty: $3.69/sale.
Catalog royalty / month
$798
$9,575/year across 10 books
Average per book
$79.79
per book per month, across the whole catalog
Where the royalty comes from
Monthly royalty contributed by each performance band at $3.69 per sale.
| Band | Books | Sales/day | Royalty/month |
|---|---|---|---|
| Slow mover | 6 | 1.2 | $133 |
| Steady seller | 3 | 3.0 | $332 |
| Strong seller | 1 | 3.0 | $332 |
| Breakout hit | 0 | 0.0 | $0 |
How many books to hit an income goal
At this catalog's current average of $79.79 per book per month, holding the same mix of slow, steady, and strong books:
$500/month
7
books like these
$1,000/month
13
books like these
$3,000/month
38
books like these
Sales bands are anchored to industry BSR-to-sales benchmarks for the Amazon US marketplace and are directional, not exact. Royalty uses Amazon's cliff-aware paperback model: (rate x list price) minus print cost, with the rate at 50% under $9.99 and 60% at $9.99 or above. The milestone counts assume new books match your current catalog's average, which is the honest planning assumption: most books are slow movers, not breakouts.
How many coloring books do you need to make money on KDP?
There is no fixed number: it depends on how well each book sells and your price. At a realistic average of one to a few dollars per book per month, reaching $1,000 a month usually takes dozens of titles, not three or four. The forecaster above shows the exact count for your own catalog mix and price.
How the catalog forecast works
The forecaster splits your catalog into four performance bands, anchored to the Amazon BSR-to-sales curve: slow movers (about 0.2 sales a day, near BSR 250,000), steady sellers (1 a day, near BSR 50,000), strong sellers (3 a day, near BSR 15,000), and breakout hits (10 a day, near BSR 5,000). It multiplies each band's daily sales by 30 days and by your net royalty per sale, then sums the catalog. The royalty per sale uses Amazon's paperback formula, (royalty rate times list price) minus printing cost, with the cliff-aware rate of 50% below $9.99 and 60% at or above it (KDP help G201834330). Because it reuses the same royalty engine as the profit calculator and pricing wizard, every pricing surface on the site stays in sync.
Why most of a catalog's income comes from a few books
Coloring book income follows a long tail. In most catalogs a handful of titles earn the majority of the royalty while the rest sell a few copies a month, because you cannot reliably predict in advance which cover and niche combination will rank and attract reviews. This is why the forecaster defaults to a conservative mix (six slow movers, three steady sellers, one strong seller for a 10-book catalog) instead of assuming every book is a winner. The practical takeaway is that scaling a coloring book business is a numbers game: more quality at-bats means more chances to land the few breakouts that carry the catalog. Forecasting against a realistic median, rather than fantasy uniform sales, keeps your income expectations honest and your publishing plan grounded.
What sales rate should you assume per book?
Assume a spread, not a single rate. The table below shows each band's sales rate, its approximate Amazon Books BSR, and the monthly royalty one book in that band earns at $9.99 with 50 design pages (a $3.69 net royalty per sale after the $2.30 print cost).
| Band | Sales/day | Approx BSR | Royalty/month (1 book) |
|---|---|---|---|
| Slow mover | 0.2 | ~250,000 | ~$22 |
| Steady seller | 1 | ~50,000 | ~$111 |
| Strong seller | 3 | ~15,000 | ~$332 |
| Breakout hit | 10 | ~5,000 | ~$1,107 |
Bands are anchored to industry BSR-to-sales benchmarks for Amazon US and are directional. Enter your own catalog above for the exact figures.
How this differs from a typical KDP income calculator
Most KDP income calculators model one book and ask you to guess a single sales-per-day number, which tends to produce optimistic totals. This forecaster models a catalog with a realistic sales spread and the cliff-aware royalty, then answers the scaling question directly.
| This forecaster | Typical income calculator | |
|---|---|---|
| Scope | Whole catalog of books | One book at a time |
| Sales assumption | Realistic bands; most books slow | One uniform number you guess |
| Royalty math | Cliff-aware (rate x list) - print | Often a flat percentage |
| Answers | Books needed for an income goal | One book's revenue |
Frequently asked questions
- How many coloring books do you need to make money on KDP?
- There is no fixed number. It depends on how well each book sells and your price. At a realistic average of one to a few dollars per book per month, reaching $1,000 a month usually takes dozens of titles, not three or four. This forecaster shows the count for your own catalog mix.
- How much can you realistically earn per coloring book?
- Most self-published coloring books are slow movers earning a few dollars a month. A steady seller at around one sale a day on a $9.99 book earns roughly $110 a month in royalty. A strong seller can reach $300 or more, but those are the minority of any catalog.
- Why do most coloring books sell so few copies?
- Amazon has millions of books competing for browse traffic, and most new titles never rank on their main keywords. A coloring book only sells well once its cover, niche, and keywords align and it builds reviews. Until then it sits at a high BSR with a few sales a month, which is normal, not failure.
- What sales numbers should I assume when forecasting a KDP catalog?
- Assume a long tail. A realistic 10-book catalog might have six slow movers, three steady sellers, and one strong seller, not ten winners. The forecaster anchors each band to the Amazon Books BSR-to-sales curve, so a steady seller means about one sale a day, the same as a BSR near 50,000.
- Does the $9.99 royalty cliff change my catalog forecast?
- Yes, materially. KDP pays 50% royalty at or below $9.98 and 60% at or above $9.99 on standard distribution, applied to the full list price before subtracting print cost. Across a catalog, pricing every book at $9.99 instead of $8.99 can add roughly a dollar of royalty to each sale.
- Is it better to publish many coloring books or perfect one?
- Volume wins for coloring books, within reason. Because income concentrates in a few breakout titles you cannot pick in advance, more quality at-bats means more chances to land a winner. The forecaster shows how the per-book average scales: doubling a healthy catalog roughly doubles royalty, while one perfect book caps your upside.
The forecast is only as good as the inputs behind it. To estimate the sales rate for a single book from a competitor's rank, use the BSR sales estimator. To project a single book's revenue in detail, use the profit calculator. To pick the right list price per book, run the pricing wizard. Before you advertise a book, find its break-even spend with the ACoS calculator. For real per-sale royalty numbers, yearly earnings at common sales velocities, and the full margin breakdown, see the profit margins guide. And for why one cent across the $9.99 line changes every book's royalty, see the royalty cliff definition.
Ready to fill out the catalog? Start a free account and generate interior pages at 300 DPI across as many niches and styles as you want, so you can ship the volume of quality at-bats a catalog needs.
Based on Amazon KDP's 2026 US marketplace pricing for black-ink paperbacks, standard distribution. Royalty = (rate x list price) - printing cost, with the rate at 50% under $9.99 and 60% at $9.99 or above. Print cost: $2.30 flat for 24-108 interior pages, $1.00 + $0.012/page for 110-828 pages. Sales bands are anchored to industry BSR-to-sales benchmarks and are directional, not exact.