kdp price calculator

How this KDP price calculator helps self-publishers

Pricing is one of the highest-leverage decisions in Kindle Direct Publishing. A small change in list price can increase your royalty per copy, but it can also reduce conversion if your price moves too far above reader expectations. This calculator gives you a quick way to model both sides: profit per sale and estimated monthly income.

Use it when launching a new title, testing a pricing update, or deciding whether your paperback margin is worth adjusting page count, trim size, or ink type. Instead of guessing, you can run scenarios in seconds.

KDP royalty formulas (simplified)

1) Kindle eBook royalty

For eBooks, Amazon generally offers a 35% or 70% plan depending on pricing and territory eligibility.

• 70% plan: Royalty = (List Price − Delivery Cost) × 70%
• 35% plan: Royalty = List Price × 35%

Delivery cost is usually based on file size. If your file is image-heavy, your net royalty under the 70% plan can drop more than expected.

2) Paperback royalty

For paperbacks sold on Amazon marketplaces, a common estimate is:

• Amazon channel: Royalty = (List Price × 60%) − Printing Cost
• Expanded distribution: Royalty = (List Price × 40%) − Printing Cost

If the result is negative, the price is too low for that channel.

How to use the calculator effectively

• Select your format: Kindle eBook or Paperback.
• Enter list price and your known costs.
• Add monthly sales to estimate recurring royalty.
• Optionally add a target royalty per sale to get a suggested minimum list price.
• Run multiple scenarios before publishing changes on KDP.

Practical pricing strategy for KDP authors

Start with your margin floor

Before checking competitors, know your minimum viable price. For paperbacks, that means a price above print-cost break-even. For eBooks, make sure file delivery costs do not quietly erode your earnings.

Then check market expectations

Look at books in your exact subcategory and length. Reader psychology matters: being significantly higher than similar books can hurt conversion unless your positioning is clearly premium.

Model revenue, not just royalty per copy

A higher royalty per copy is not always best. Sometimes a slightly lower price increases unit volume enough to produce better total monthly income.

Example scenario

Suppose you have a Kindle eBook at $4.99, 70% royalty plan, and 2 MB file size:

• Delivery cost = 2 × $0.15 = $0.30
• Net = $4.99 − $0.30 = $4.69
• Royalty per sale = $4.69 × 70% = $3.28 (approx.)
• At 100 sales/month, estimated royalty = about $328

This quick estimate gives you a clear benchmark for testing ads, running promos, or choosing whether to raise/lower price.

Final thoughts

A reliable KDP pricing workflow is simple: calculate your true royalty, compare with market pricing, and test carefully over time. Use this tool whenever you launch a new title, release a second edition, or adjust trim and printing specs.

Better pricing decisions compound across your whole catalog, and that can make a meaningful difference in long-term author income.