KDP categories · Top KDP authors
Fluid Dynamics (Dynamics, Books): Amazon KDP category data
Amazon Books Best Sellers data for Fluid Dynamics (Dynamics, Books), updated Nov 2, 2026: median price $41.75, median 11 reviews, average rating 4.4 and a KDPTop opportunity score of 34/100 (highly competitive).
| Price range (middle 50%) | $24.43 – $78.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 16% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 22% of the parent category Dynamics (51), one of the easier corners under it.
- At $41.75 its median price beats 94% of Books categories, leaving more margin per copy.
- 16% of its best sellers came out in the last 90 days, more than in 83% of Books categories: readers here keep buying new titles.
Top 10 Fluid Dynamics best sellers
-
Scientific American September 2026
- List rank#1
- Price$6.99
- Rating4.8
- Reviews13
-
Scientific American October 2026
- List rank#2
- 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#3
- Price$19.99
- Rating4.6
- Reviews301
-
Scientific American June 2026
- List rank#4
- Price$6.99
- Rating4.4
- Reviews42
-
Scientific American November 2026
- List rank#5
- Price$6.99
- Reviews-
-
The Fourth Phase of Water : Beyond Solid, Liquid, and Vapor
by Gerald Pollack
- List rank#6
- Price$23.74
- Rating4.8
- Reviews824
-
HVAC Troubleshooting and Diagnostics: A Practical Field Workbook for Diagnosing Common Residential HVAC Problems
by T Anvith
- List rank#7
- Price$16.99
- Rating4.8
- Reviews6
-
![HVAC BIBLE [10 in 1] The Ultimate Beginner's Guide: Mastering Residential & Commercial Sys book cover by Mike Ursan](https://images-na.ssl-images-amazon.com/images/I/71EZxEzDE+L._AC_UL300_SR300,200_.jpg)
HVAC BIBLE [10 in 1] The Ultimate Beginner's Guide: Mastering Residential & Commercial Systems, Setup to Advanced Troubleshooting, Practical Maintenance, Energy Efficiency, and Career Insights
by Mike Ursan
- List rank#8
- Price$22.53
- Rating4.1
- Reviews537
-
The Complete HVAC BIBLE for Beginners: A Step-by-Step Guide to Heating, Ventilation and Air Conditioning Systems - Maintenance and Troubleshooting to Become the HVAC Expert and Slash the Bill
by Alex Winterfield
- List rank#9
- Price$19.99
- Rating3.8
- Reviews205
-
The Essential Guide to Passing the Water Resources and Environmental Civil PE Exam Written in the Form of Questions: 160 CBT Questions Every PE Candidate Must Answer
by Dr Jacob Petro PE
- List rank#10
- Price$94.50
- Rating4.7
- Reviews86
Same niche in Kindle eBooks: Fluid Dynamics
FAQ
Is Fluid Dynamics a good niche for Amazon KDP?
Its KDPTop opportunity score is 34/100, which makes it highly competitive. The median best seller has 11 reviews and sells for $41.75.
How many reviews do you need to rank in Fluid Dynamics?
The median best seller has 11 reviews, and 89% of them have fewer than 100.
What do Fluid Dynamics best sellers cost?
The median price is $41.75; half of the best sellers are priced between $24.43 and $78.99.
Can new books break into Fluid Dynamics?
16% 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.