People Trust Other Buyers More Than They Trust Ads
Social proof is the psychological effect where other people's behavior and opinions shape a buyer's decision. No matter how polished a product page looks, a listing with zero reviews will almost always lose to one with 500 reviews averaging 4.8 stars. Most online shoppers check reviews before buying, and both the volume and quality of those reviews have a direct, measurable effect on conversion rate.
This calculator combines review count, average rating, and total buyer count into a single 0-100 social proof score. Review count and buyer count use a logarithmic curve so early reviews move the score quickly while later ones add smaller, diminishing gains — reflecting how buyers actually perceive "a lot" of reviews. Rating gets the largest weight since it's the single number shoppers judge trust by fastest.
If your score comes back low, use the breakdown table to see exactly which component is holding you back. A low review count calls for post-purchase review prompts or small incentives; a low rating means it's time to look at product or shipping quality itself. Social proof isn't built overnight, but managed consistently, it becomes one of the most reliable ways to lift conversion without spending more on ads.
Frequently Asked Questions
It combines review count, average rating, and buyer count, each scaled logarithmically, into a single 0-100 score.
Rating carries the most weight, but review count and buyer count matter too, so very few reviews will still cap your score.
Start by increasing review count with post-purchase review prompts or small rewards — it has the fastest impact.