Kindle Royalty & Profit Calculator
Estimate your monthly Kindle Direct Publishing (KDP) income from ebook sales and Kindle Unlimited page reads.
Tip: 70% royalty is typically available only in certain marketplaces and price bands.
If you publish through Amazon KDP, understanding your numbers is not optional. Most authors focus on writing and promotion but forget the most useful question: How much do I actually keep per month? This Kindle calculator helps you answer that quickly with practical variables—royalty rate, delivery cost, Kindle Unlimited reads, and ad spend.
What this Kindle calculator shows you
The calculator above gives you a realistic snapshot of your publishing business. Instead of only showing gross sales, it estimates net profit after recurring costs.
- Royalty per sale: your earnings for each ebook unit sold
- Monthly sales royalties: royalties from direct purchases
- Kindle Unlimited royalties: payout from KENP reads
- Net monthly and annual projection: profit after expenses
- Break-even metrics: how many sales (or pages read) it takes to cover costs
How Kindle royalties work (simple version)
70% royalty option
For many Kindle ebooks, Amazon offers a 70% royalty rate. However, delivery fees are usually deducted based on file size, and eligibility depends on price and region. If your file is image-heavy, delivery cost can materially reduce net royalties.
35% royalty option
The 35% option is more flexible with pricing, but revenue per unit is lower. This can still work for shorter books, low-priced lead magnets, or international pricing experiments.
Kindle Unlimited (KENP)
KU pays per page read, not per borrow. The payout rate changes monthly and is set by Amazon’s global fund. That means your KU income can fluctuate even when page reads stay flat.
Input guide: how to use realistic numbers
Better inputs lead to better planning. Use recent 90-day averages instead of one strong or weak month.
- List Price: your current market price, not your ideal price
- Monthly Units Sold: include promo spikes only if they happen regularly
- KENP Pages: average your page reads from KDP reports
- Ad Spend: include Amazon Ads, Facebook, BookBub tests, and newsletter swaps
- Other Costs: software subscriptions, cover updates, formatting, assistants
Example scenario
Suppose you price at $4.99 with 70% royalty, sell 150 copies/month, and get 30,000 KU page reads. You spend $200 on ads and $50 on tools. In many cases, KU plus direct sales can produce stable profit, but only if ad efficiency is controlled. If ad spend rises faster than royalties, your business can look successful on revenue but weak on net income.
How to improve Kindle earnings
1) Increase royalty per reader, not just traffic
Improve your book package first: stronger cover, tighter blurb, better opening pages. Conversion improvements amplify every ad dollar.
2) Watch delivery cost on large files
If your ebook includes many high-resolution images, compress intelligently. Lower delivery charges increase profit per sale under the 70% model.
3) Use read-through strategy
Series authors often earn more from book two and beyond. A smaller margin on book one can still be profitable if read-through is high.
4) Track net, not vanity metrics
Clicks, impressions, and rank can be useful, but net monthly income is the number that matters. A calculator-driven workflow keeps decisions objective.
Common mistakes authors make
- Assuming every sale yields 70% of list price
- Ignoring delivery fees for image-heavy books
- Treating KU payout rate as fixed all year
- Scaling ads before conversion is stable
- Forgetting recurring business costs
Final thought
A Kindle book can be a meaningful income stream, but only when numbers guide the strategy. Use this calculator monthly, compare against your KDP dashboard, and adjust pricing, ad spend, and production decisions based on profit. Small, consistent optimization beats random big swings every time.