Free tool
How many 5-star reviews to raise your rating?
Is your Google rating stuck despite new reviews? It is simple maths: the more reviews you have, the less each new one weighs in the average. This calculator tells you exactly how many 5-star reviews you need to reach your target rating, using Google's real rounding rule.
How many 5-star reviews to raise your Google rating?
Enter your current rating, your number of reviews and the rating you are aiming for. We calculate how many 5-star reviews you need to reach it on Google.
How Google calculates your average rating
The rating shown on your business profile is the arithmetic average of all your reviews, rounded to one decimal place. In practice, a real average of 4.25 is displayed as 4.3 and an average of 4.24 as 4.2. This is the rounding rule the calculator applies: to display 4.5, you only need a real average of 4.45.
The direct consequence: the more reviews your profile has, the more inert the average becomes. Going from 4.2 to 4.5 takes a handful of 5-star reviews when you have 20, and several dozen when you have 200.
A concrete example
A restaurant has 50 reviews and a 3.9 rating. To display 4.2, it needs a real average of 4.15, which means 15 five-star reviews in a row. If it receives a single 1-star review during the campaign, it needs 4 more five-star reviews. That is why a collection strategy is not just about asking for reviews: it must also catch dissatisfaction before it goes public.
Three levers to raise your rating
- Ask every time. Most satisfied customers do not leave a review on their own. A simple request, at the right moment, changes the volume.
- Defuse negative reviews. An unhappy customer who can speak to you privately first rarely leaves a public review.
- Showcase the reviews you get. Displaying your rating and best reviews on your website builds trust and conversion.
Important: never buy reviews. It is forbidden by Google and by law in France and across the European Union, and penalised profiles lose far more than a few tenths of a point.
Questions
About the calculator
How many Google reviews does it take to raise your rating?
It depends on three figures: your current rating, your number of reviews and your target rating. The calculator above gives the exact number of 5-star reviews needed, taking into account Google's rounding to one decimal place.
Why does my Google rating not move despite new reviews?
Because each new review is diluted in the average of all existing reviews. With 200 reviews, one more 5-star review only weighs 0.5% of the average. You therefore need a sufficient volume of positive reviews, spread regularly over time.
Is the rating displayed by Google exactly my average?
The displayed rating is the average rounded to one decimal place. Your real average may therefore be slightly lower or higher than the rating visible on your profile.
Can one negative review cancel out several positive ones?
Yes. A 1-star review mechanically pulls the average down by the equivalent of several 5-star reviews, all the more so when your profile has few reviews. That is why preventing dissatisfaction matters as much as collecting reviews.
Is this calculator free?
Yes, it is free, with no sign-up, and you can use it as many times as you like.
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