Google Maps Review Calculator
Find your business and set the rating you want. The calculator reads how many reviews you have at each star level on Google, works out your exact average, and shows how many 5-star reviews it takes to get there.
- BusinessFind your business, step 1 of 3, current
- GoalSet a goal, step 2 of 3
- ResultSee what it takes, step 3 of 3
Find your business
Search for it the way you would on Google Maps: the name and the town.
The maths
How the calculator works it out
Three things decide what a rating goal takes: how many reviews you have, how they are spread across the stars, and how Google rounds the average it shows.
It works out your exact average
Google Maps lists how many reviews a business has at each star level. Each count times its stars, added up and divided by the total, gives the average to three decimals. Google shows only one.
(5 × 36 + 4 × 16 + 3 × 5 + 2 × 2 + 1 × 4) ÷ 63 = 4.238
It adds 5-star reviews until the goal
Each 5-star review lifts the average a little less than the one before. The calculator finds the smallest number that reaches your goal, in whole numbers, so it is never one short.
(267 + 5 × 97) ÷ (63 + 97) = 4.700
It shows when Google’s display steps up
Google rounds the average to one decimal, halves up. Your listing can show your goal before the average itself gets there, and the calculator tells you when.
An average of 4.65 shows as 4.7
For example, a bakery with 63 reviews: 36 at 5 stars, 16 at 4 stars, 5 at 3 stars, 2 at 2 stars, 4 at 1 star, and a goal of 4.7. The business is made up.
Why the rating Google shows is not enough
Two listings with 200 reviews each both show 4.7. One has an average of 4.650, the other 4.745. To show 4.8, the first needs 80 more 5-star reviews and the second needs 4. Only the count at each star level tells them apart, which is why the calculator reads it.
How many 5-star reviews do I need to raise my Google rating?
It depends on how many reviews you have now and how they are spread across the stars. A listing with a few reviews moves quickly; one with hundreds takes many more to move by the same amount.
The calculator reads how many reviews you have at each star level, works out your exact average, and finds the smallest number of 5-star reviews that brings it to your goal.
How does Google round my rating?
Google shows the average to one decimal and rounds halves up: an average of 4.65 shows as 4.7, and 4.75 shows as 4.8.
So your listing can show your goal a little before the average itself reaches it. The calculator tells you both numbers.
Why is my exact average different from the rating Google shows?
The rating on your listing is rounded. Your exact average is the same reviews to three decimals: a listing that shows 4.7 could be anywhere from 4.65 to just under 4.75, and that difference can change what a goal takes by dozens of reviews.
Can I get a 5.0 rating on Google?
Google shows 5.0 from an average of 4.95. An average of exactly 5.0 needs every review to be 5 stars, so once any review is lower, each new 5-star review only brings it closer.
If your goal is 5.0, the calculator shows how many 5-star reviews it takes for Google to show 5.0 instead.
Why does the calculator sometimes say estimate?
When the count at each star level cannot be read from Google Maps, the answer is worked out from the rounded rating and the number of reviews instead. It is labelled an estimate and given as a range, because the true average could be anywhere that rounds to the rating shown.
Should I only ask happy customers for a review?
No. Google asks businesses not to pick which customers to ask for a review by how happy they seem. Ask every customer.
RepRocket asks everyone to rate their visit. Unhappy customers tell you first, so you can put things right, and every customer is still offered your review links.
How long does a new review take to count?
Google says a new review can take up to two weeks to appear on your listing and in its rating.
Is the calculator free?
Yes, and you do not need an account. Exact readings are limited for each visitor so the calculator stays quick for everyone; if you look up many businesses in a short time, you get an estimate until the limit frees up again.
Every review starts with someone asking
RepRocket asks every customer to rate their visit, offers each one your review links, and tells you at once when someone is unhappy.