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Make your next rating goal concrete

Google Review Rating Calculator

See how many 5-star reviews you need to reach your target rating, simulate review loss, and plan your review strategy.

How many reviews to reach your target?

Progress to 4.5 stars91%

4.2 → 4.5

51

5-star reviews needed to reach 4.5

≈ 11 months at 5 reviews/month

If your next review is...

1 star

4.16

3 stars

4.19

5 stars

4.21

5 reviews could disappear before your displayed rating drops to 4.1

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Plan your weekly review requests

Estimate the customer requests needed to reach your rating goal. These are planning assumptions, not a promise of reviews or ratings.

40 customer requests per week

About 8 new reviews per week · 85 new reviews total

The displayed Google rating is rounded, so estimates are approximate. Ask customers for honest feedback regardless of their experience.

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Ready-to-send review requests

Personalize a message, then copy and send it yourself. Invite honest feedback from all customers, without incentives.

Find your link in Google Business Profile → Ask for reviews. Customer names saved here remain on this browser.

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Make sense of your result

How many 5-star reviews do you need?

Use the rating calculator to turn a target average into an estimated number of new reviews. Google describes its review score as the average of published ratings.

How to use this tool

  1. Enter your current displayed rating and published review count.
  2. Choose a target average below 5 stars and an estimated number of new reviews per month.
  3. Compare the target calculation with the review-loss simulator before planning your next steps.

Free calculator. No signup or Google connection required. Calculations use the numbers you enter.

Illustrative example

Moving from 4.2 to a 4.5 average

Starting point
100 reviews × 4.2 stars = 420 total stars
New feedback
60 new 5-star reviews add 300 stars
Estimated average
(420 + 300) ÷ (100 + 60) = 4.5 stars

What to do with the result

The equation is n = review count × (target − current average) ÷ (5 − target), rounded up to a whole review. At 10 new 5-star reviews per month, this example would take about 6 months.

What this tool can tell you

A displayed rating is rounded, so the original star total may differ from rating × count. The estimate assumes every added review is 5 stars and no existing reviews disappear. A displayed 5.0 is different from an exact 5.0 average.

Reference: How Google calculates review scores

Does reaching the target guarantee a better Google position?

No. A rating target describes your review average, not a search ranking. Location, relevance, and other signals also matter.

Should I ask only happy customers for reviews?

Ask customers for honest feedback without selecting them based on whether you expect a positive rating. The calculator is a planning estimate, not a reason to filter review requests.

Get notified when your real review count or rating changes

Connect your Google Business Profile and let ReviewPanel track your rating automatically. Start free with quarterly sync — upgrade to Personal for updates every 14 days and deleted-review detection.

Start Tracking Free

How Google calculates your rating

Google states that the review score is calculated from the average of all published ratings. Each review contributes equally — a business with 100 reviews at 4.5 and one new 1-star review would become (100 × 4.5 + 1) / 101 = 4.47.

Google rounds the displayed score to one decimal place. A rounded starting rating can make this calculation differ from the exact published average.

This calculator uses the published formula. Estimates can differ because the input rating is rounded, the assumed new ratings differ from actual feedback, or published reviews change.