Google review calculator
See how many 5-star reviews you need to reach your target Google rating, and what one bad review really costs you.
You need
32 five-star reviews
in a row to lift your average from 4.3 to 4.7, with no lower reviews in between.
Five-star reviews needed by target
| 4.5 stars | 10 |
| 4.6 stars | 18 |
| 4.7 stars | 32 |
| 4.8 stars | 60 |
| 4.9 stars | 144 |
What one bad review costs you
One 1-star review would take 5 five-star reviews to get you back to 4.3.
The more reviews you have, the less any single review moves your average. That's why a steady flow of reviews matters more than a perfect score.
Get those reviews faster
Get your direct review link, QR code and printable review card with our free Google review link generator, then follow our guide on how to get more Google reviews.
How the calculation works
Your Google rating is the average of your reviews. To find how many 5-star reviews lift it to a target, the calculator solves this for the number of new reviews:
five-star reviews needed = current reviews × (target − current rating) ÷ (5 − target)
It rounds up, and assumes every new review is 5 stars. In real life a few 4-star reviews will slip in, so aim a little higher. Google also shows your rating rounded to one decimal place and may filter reviews it thinks are spam, so treat the result as a close guide.
The big lesson: the closer you get to 5.0, the harder each extra tenth becomes. A steady flow of new reviews does more for your business than chasing a perfect score. If a review breaks Google's rules, here's how to remove a Google review. For the rest, read how to respond to Google reviews.
Frequently asked questions
It depends on how many reviews you already have. The formula is: current reviews × (target − current rating) ÷ (5 − target). For example, going from 4.3 to 4.7 with 24 reviews takes 32 five-star reviews in a row.
Your rating is roughly the average of all your star ratings, shown to one decimal place. Google may filter some reviews it thinks are spam, so your shown rating can differ slightly from a simple average.
It depends on your current rating. The closer you are to 5.0, the more five-star reviews it takes. At 4.8, it takes about 19 five-star reviews to undo one 1-star review. The calculator works it out for your profile.
Only if it breaks Google's policies, such as spam, fake reviews or conflicts of interest. Real negative reviews usually stay, so the best fix is more reviews from happy customers.
Most customers are comfortable with anything from about 4.5 upwards, and many are suspicious of a perfect 5.0 with only a few reviews. The number and recency of reviews matter as much as the score.