How many 5-star reviews do I need to raise my Google rating?

Take the gap between your target and your current average, multiply it by your number of reviews, and divide by the gap between 5 and your target. With 40 reviews at 4.3, reaching 4.6 takes 40 x 0.3 / 0.4 = 30 more 5-star reviews.

How many 5-star reviews cancel out a 1-star review?

It depends on the rating you want to hold. At a 4.5 average it takes 7, at 4.8 it takes 19, and at 4.9 it takes 39. The formula is (target minus 1) divided by (5 minus target).

Can I get to a 5.0 rating?

Only by never receiving anything below 5 stars. Once a single lower rating exists, no number of 5-star reviews brings the average all the way back to 5.0, which is why the calculator caps the target just below it.

Is this exactly how Google calculates my rating?

This is the plain average of star ratings. The number Google shows can differ slightly, for example when reviews are removed or not yet published, so treat the result as a close guide rather than a promise.

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Google review calculator.

How many 5-star reviews you need to reach the rating you want, and how long that takes at your own pace. Nothing is sent anywhere.

Your current Google rating

The number shown on your Business Profile, for example 4.3. How many reviews you have now

The rating you want 4.6 Jobs or appointments you finish in a month

Share of customers you ask who leave a review 10% Your own guess. Start low; you can check it against real numbers after a month of asking.

5-star reviews you need

New reviews a month if you ask everyone 0

Time to reach your target -

5-star reviews to balance one 1-star 0

See how the Reviews plan works

The Reviews plan sends the ask a few hours after each finished job, by text or email, and gives every customer the same link to Google. $197 a month, no contract, and most businesses are live in three to seven days.

How the math works

Your average is the total of all star ratings divided by the number of reviews. Each new 5-star review adds 5 to the total and 1 to the count, so the calculator finds the smallest number of them that lifts the average to your target. Written out, that is your review count multiplied by the gap to your target, divided by the gap between 5 and your target, rounded up.

The second half is pace. Jobs a month multiplied by the share of asked customers who leave a review gives new reviews a month. That assumes you ask everyone, and that some of those reviews will not be five stars, so the time shown is a floor rather than a promise.

Two things the numbers make obvious. The closer your target gets to 5, the more each extra tenth costs, because every review below five weighs more. And the lever you control is the number of customers you ask. The rating follows the asking.

Common questions

How many 5-star reviews do I need to raise my Google rating?: Take the gap between your target and your current average, multiply it by your number of reviews, and divide by the gap between 5 and your target. With 40 reviews at 4.3, reaching 4.6 takes 40 x 0.3 / 0.4 = 30 more 5-star reviews.
How many 5-star reviews cancel out a 1-star review?: It depends on the rating you want to hold. At a 4.5 average it takes 7, at 4.8 it takes 19, and at 4.9 it takes 39. The formula is (target minus 1) divided by (5 minus target).
Can I get to a 5.0 rating?: Only by never receiving anything below 5 stars. Once a single lower rating exists, no number of 5-star reviews brings the average all the way back to 5.0, which is why the calculator caps the target just below it.
Is this exactly how Google calculates my rating?: This is the plain average of star ratings. The number Google shows can differ slightly, for example when reviews are removed or not yet published, so treat the result as a close guide rather than a promise.

The routine behind the numbers, from timing to wording to the rules, is in how to get more Google reviews. If the gap looks long, how to ask customers for reviews has templates you can use today, and how to respond to negative Google reviews covers the ones that pull the average down.

See the Reviews plan