KDP categories · Top KDP authors
Chemical (Engineering, Books): Amazon KDP category data
Amazon Books Best Sellers data for Chemical (Engineering, Books), updated Nov 3, 2026: median price $30.92, median 57 reviews, average rating 4.5 and a KDPTop opportunity score of 34/100 (highly competitive).
| Price range (middle 50%) | $19.15 – $69.09 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 13% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 4% of the parent category Engineering (1,328), one of the easier corners under it.
- The same niche in Kindle eBooks scores 24, 11 points lower than here.
- At $30.92 its median price beats 89% of Books categories, leaving more margin per copy.
Top 10 Chemical best sellers
-
Scientific American September 2026
- List rank#1
- Price$6.99
- Rating4.8
- Reviews13
-
Silent Spring
- List rank#2
- Price$11.48
- Rating4.6
- Reviews4,029
-
Scientific American October 2026
- List rank#3
- Price$6.99
- Rating4.2
- Reviews7
-
Ultimate Guide: Plumbing, 6th Edition: 2024 National Plumbing Code Standards (Creative Homeowner) Beginner-Friendly Step-by-Step Home Plumbing Projects, DIY Repair Information, and Over 800 Photos
by Editors of Creative Homeowner
- List rank#4
- Price$19.99
- Rating4.6
- Reviews301
-
Scientific American June 2026
- List rank#5
- Price$6.99
- Rating4.4
- Reviews42
-
Prepper's Water Purification Survival Bible: Discover the 7 Essential Skills on How to Find, Collect, Filter, Purifying and Store Water with Easy Step by Step Instructions
by Bryan Wells
- List rank#6
- Price$15.99
- Rating4.4
- Reviews8
-
Sodium Bicarbonate: Nature's Unique First Aid Remedy
by Mark Sircus
- List rank#7
- Price$13.01
- Rating4.6
- Reviews1,567
-
The Natural Soapmaking Handbook: Easy Recipes and Techniques for Beautiful Soaps from Herbs, Essential Oils and Other Botanicals
by Simi Khabra
- List rank#8
- Price$20.49
- Rating4.9
- Reviews557
-
-
Scientific American November 2026
- List rank#10
- Price$6.99
- Reviews-
Subcategories
Same niche in Kindle eBooks: Chemical
FAQ
Is Chemical a good niche for Amazon KDP?
Its KDPTop opportunity score is 34/100, which makes it highly competitive. The median best seller has 57 reviews and sells for $30.92.
How many reviews do you need to rank in Chemical?
The median best seller has 57 reviews, and 64% of them have fewer than 100.
What do Chemical best sellers cost?
The median price is $30.92; half of the best sellers are priced between $19.15 and $69.09.
Can new books break into Chemical?
13% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.