Enter a keyword and three numbers from Amazon. Get a Gap Score in 10 seconds.
01
Amazon Results
Go to Amazon Books search. Search your exact keyword. Find text like: "1–16 of over 4,000 results" Enter 4000.
02
Best Seller Rank
Open the top ranking book. Scroll to Product Details. Find: "Best Sellers Rank #24,512 in Books" Enter 24512. Use overall Books rank only, not category rank.
03
Review Count
On the same book page, find the rating count. Example: 847 ratings Enter 847.
Your Niche Data
Please enter a keyword.
Please enter the Amazon result count.
Please enter the Best Seller Rank. BSR must be greater than 0.
Please enter the review count (use 0 if none).
Niche Scored
Dead Market Warning
This niche shows extremely high supply with virtually no demand signal. The market isn't just crowded — it's inactive. Moving forward here would put you in direct competition with thousands of established titles for buyers who likely aren't there.
Low Demand Notice
This niche technically scores in the Borderline range, but the demand signal is very weak. Even if competition is low, there may not be enough buyers to generate consistent sales. Consider validating demand with keyword research tools before committing.
High Demand, Low Barrier
Strong sales potential here — but other publishers have likely spotted this too. The low competition and review counts suggest the window is open, but it may not stay that way. Speed matters more than usual in this niche.
Score Breakdown
Signal
Your Input
Sub-score
Weight
Contribution
Search Results
35%
Top BSR
40%
Reviews
25%
Gap Score
Monthly Estimates
Sales Estimate
Based on the top book's BSR. Actual sales vary by cover, price, and keywords.
Royalty Estimate
Using avg. royalty of $3.46/sale. Your royalty depends on price and format.