kdp ebook royalty calculator

How the KDP ebook royalty calculator works

This tool gives authors a fast way to estimate Kindle earnings before publishing. You enter your ebook list price, file size, and expected sales. The calculator then estimates your per-sale royalty and scales it to monthly and annual income.

For many self-published authors, the biggest planning mistake is picking a price without running the math. A small difference in royalty per copy can mean thousands of dollars over a year. This calculator helps you test scenarios quickly so you can choose pricing with confidence.

KDP royalty basics: 35% vs 70%

35% royalty option

At 35%, your estimated royalty is straightforward:

• Royalty per sale = net list price × 35%
• No delivery fee deduction in this simple estimate
• Useful for books outside the 70% pricing requirements

70% royalty option

At 70%, Amazon deducts a delivery cost based on file size in eligible marketplaces. The estimate is:

• Royalty per sale = (net list price − delivery cost) × 70%
• Delivery cost = file size (MB) × delivery fee per MB
• Generally tied to price and territory eligibility rules

Step-by-step: using this calculator

1. Enter your ebook list price in USD.
2. Add your file size in MB (larger files reduce 70% royalties).
3. Set your delivery rate (default shown is common for US estimates).
4. Add expected monthly unit sales.
5. If your displayed price includes tax, check the VAT box and set VAT %.
6. Choose compare mode or a single royalty view, then calculate.

You’ll immediately see per-sale, monthly, and annual estimates. In compare mode, you also get a direct difference between 70% and 35% performance.

Example pricing scenarios

Scenario A: Mid-priced nonfiction

Suppose your ebook is priced at $4.99, file size is 2 MB, and you sell 500 copies per month. In many cases, 70% can outperform 35% by a wide margin even after delivery fees, giving stronger monthly cash flow.

Scenario B: Large image-heavy ebook

If your file size is large (for example, 30 MB), delivery costs can dramatically reduce the 70% option. A text-first layout, image compression, and optimized formatting can materially improve your net royalty per sale.

Ways to improve your KDP ebook royalties

• Optimize file size: compress images, remove unnecessary assets, and simplify formatting where possible.
• Test price points: run the calculator at multiple prices before launching promotions.
• Monitor conversion: a lower price may increase volume enough to out-earn a higher price.
• Plan with annual targets: monthly changes look small, but annual differences can be major.
• Use clean metadata: stronger keywords and categories can lift organic sales without ad spend.

Important notes and limitations

This calculator provides an estimate, not a guaranteed payout. Actual KDP royalties can vary by marketplace, currency conversion, taxes, promotional pricing, and policy updates. Always verify final numbers in your KDP dashboard and current Amazon documentation.

That said, this estimator is still extremely useful for planning. If you treat it as a decision tool rather than an exact accounting report, it can help you make better pricing and publishing choices much faster.

Final thoughts

A KDP ebook business grows when your pricing strategy is intentional. Use the calculator above to model best-case, likely-case, and conservative-case outcomes. That simple habit can prevent costly pricing mistakes and improve long-term author income.