For Online Sellers

Rating Calculator: How Many 5-Star Reviews to Reach 4.5?

Free tool · Updated October 2, 2026 · By CouponTalk · Reviewed by CouponTalk Expert Reviews on October 2, 2026

Your result

Enter your measurements to see your result.

Quick answer

5-star ratings needed = current count × (target − current) ÷ (5 − target). A product at 3.8 stars from 200 ratings needs 143 more 5-star ratings to reach 4.3, and 280 to reach 4.5. Raising a rating gets harder the closer the target is to 5.

How to use this calculator

Enter your current average rating and total number of ratings.
Enter the rating you want to reach.
Remember that marketplaces may weight recent or verified ratings more.

Formula

5-star ratings needed = Current count × (Target − Current) ÷ (5 − Target)

Assumes a simple average. Marketplaces may weight recent and verified ratings more.

Fees and rates checked on 2 October 2026. Marketplaces revise rate cards often, so confirm current figures in your seller dashboard before you set prices.

Frequently asked questions

How do I get more 5-star ratings legally?

Fix the top complaint in your reviews, improve packaging, add a clear size chart, and use the marketplace's official review request feature. Paying for or incentivising reviews breaks Amazon and Flipkart policies.

Is the displayed rating a simple average?

Not always. Amazon uses a weighted model that gives more weight to recent and verified-purchase ratings, so the calculator gives an estimate.