Opportunity Score

One number beats three gut feelings. This calculator rolls demand, competition, and your margin into a single 0–100 opportunity score so you can rank product ideas without arguing with yourself.

The weights are simple and shown in the output: demand is 40%, competition 35%, margin 25%. Demand uses your estimated monthly sales — pull that from the BSR-to-sales tool, not from hope. Competition uses the count of strong incumbents; fewer than four and you score well, ten and you're capped low. Margin is your take-home percentage after fees and ad spend, not the factory-to-price gap.

Why those weights? Demand leads because no margin survives on zero volume — a 50% margin on ten sales a month is dinner, not a business. Competition is next because it decides whether you ever reach the demand. Margin is last because it's the easiest to improve after launch with better sourcing or a small price move.

Two honest caveats. First, the score is only as good as the inputs. If your monthly sales estimate comes from a Jungle Scout graph you didn't sanity-check, the score inherits that guess. Every estimator on the market is reverse-engineering BSR, so treat the demand number as a range, not a promise. Second, a high score on a seasonal product can still flatten for nine months of the year — check the demand trend before you commit cash.

Use the score to compare ideas side by side, not as a verdict. A 72 and a 68 are tied; a 72 and a 31 are not. Let it kill the weak ideas fast so you spend your research time on the ones that might actually work.