Google Review Calculator
Find out how many 5-star reviews you need to reach 4.5, 4.7 or 4.9 stars on Google. Type your numbers or fill them from your Google profile.
To show 4.7★ on Google
about 87 more 5-star reviews
Google rounds your rating to one decimal, so your real average could be a little higher or lower than 4.3. It could take as few as 75 or as many as 100.
| 4.5 | 24 |
| 4.6 | 49 |
| 4.7 | 87 |
| 4.8 | 157 |
| 4.9 | 319 |
Get those reviews without chasing anyone
RankLocal sends review requests by QR code, SMS or email, replies to every review in your tone, and tracks your rating as it climbs.
How the calculation works
Google shows your average rating rounded to one decimal. To show 4.5, your real average must reach 4.45. The number of 5-star reviews you need is:
Example: a business shows 4.2 stars with 90 reviews and wants 4.5. It needs about 41 more 5-star reviews. Because 4.2 could really be anything from 4.15 to 4.25, the true answer is between 33 and 50. Calculators that ignore rounding say 54.
What one bad review does to your rating
A 1-star review hurts most when you have few reviews. A business showing 4.8 with 50 reviews drops to 4.7 after one 1-star review. It then takes 19 five-star reviews to get back to 4.8. The calculator shows this for your own numbers.
A calm, public reply does not change the rating, but it changes what the next customer reads. See how to respond to negative reviews.
How to get more Google reviews within the rules
- Ask every customer, right after the job. Google does not allow asking only the happy ones.
- Send your direct review link. Get it free with the Google review QR code generator.
- Never pay or offer a discount for a review. Google can remove reviews gathered that way.
- Reply to every review. The full routine is in how to get more Google reviews.
Frequently asked questions
How many 5-star reviews do I need to get a 4.5 rating?
It depends on your rating and review count now. For example, a business showing 4.2 stars with 90 reviews needs about 41 more 5-star reviews to show 4.5. Type your own numbers in the calculator above.
How is a Google rating calculated?
Google shows the average of all your star ratings, rounded to one decimal. A real average of 4.65 or more shows as 4.7. Google can also hide reviews it thinks are fake, so the count you see is the count that is used.
Why is the answer a range?
Because Google rounds. A profile showing 4.3 could really average anywhere from 4.25 to just under 4.35. The calculator gives the number for exactly 4.3, plus the fewest and the most it could take.
How much does one 1-star review hurt?
More when you have few reviews. A business showing 4.8 with 50 reviews drops to 4.7 after one 1-star review, and needs 19 five-star reviews to get back to 4.8.
Can I reach 5.0 again?
Not after a review below 5 stars, unless that review is removed. Each new 5-star review brings the average closer to 5.0 but never all the way.
Can I offer a discount for a review?
No. Google's policy prohibits offering money, discounts or gifts for reviews, and it prohibits asking only happy customers. Reviews gathered that way can be removed.