See how many 5-star reviews you need to reach your target rating, simulate review loss, and plan your review strategy.
4.2 → 4.5
51
5-star reviews needed to reach 4.5
≈ 11 months at 5 reviews/month
1 star
4.16
3 stars
4.19
5 stars
4.21
5 reviews could disappear before your displayed rating drops to 4.1
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Start Tracking FreeGoogle states that the review score is calculated from the average of all published ratings. Each review contributes equally — a business with 100 reviews at 4.5 and one new 1-star review would become (100 × 4.5 + 1) / 101 = 4.47.
Google rounds the displayed score to one decimal place. The actual value used for ranking may include more precision.
This calculator uses the published formula. Actual displayed ratings may vary slightly due to Google's internal weighting or timing of review processing.