Free tool · Google Business Profile
Google Reviews Calculator
Enter your current rating, your review count, and where you want to be — see exactly how many new 5★ reviews it takes to get there. Nothing here touches your account; it's just the math.
Enter your numbers above to see your result.
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What your average becomes after more 5★ reviews
How we calculate this
How the math works
No black box — it's one weighted-average formula, run backwards.
Your Google rating is a weighted average: your current total (rating × review count) divided by your review count. Every new 5★ review adds a 5 to that total and 1 to the count — so if you want to know how many 5★ reviews it takes to move the average from a current rating to a target rating, you can solve for it directly:
Worked example: a business at 4.2★ from 120 reviews wants to reach 4.6★. That's 120 × (4.6 − 4.2) / (5 − 4.6) = 120 × 0.4 / 0.4 = 120 — so it
takes roughly 120 new 5★ reviews, assuming every one of them is a perfect 5 and nothing
else changes. Round up, because you can't submit a fraction of a review.
Why ratings move slower than you'd expect
Look at the formula again: reviews sits in the numerator. The more reviews you already have,
the more new 5★ reviews it takes to move the average by the same amount — a business with 20 reviews can
swing its average with a handful of new ones; a business with 2,000 reviews needs proportionally many more
to move it at all. That's not a flaw in the tool, it's just what a weighted average does: your history has
inertia, and the more of it there is, the harder it is to shift.
Which is also why a steady, ongoing habit of asking for reviews beats a one-time push — the number above is a target to work toward every month, not a sprint. Our guide to getting more Google reviews covers the actual tactics, and our review link generator makes each individual ask easier to act on.
Now go get those reviews, systematically
Knowing the number is the easy part. Our 16 ways to get more Google reviews playbook covers what actually moves review count, and our free Google Review Link Generator gives you a direct link (plus a QR code) so every ask is one tap from a finished review — no searching for your listing required.
Straight answers
Frequently asked questions
Usually not, because you generally can't. You can't delete a review someone else left — only Google can remove one, and only if it violates their policies (spam, fake engagement, off-topic content, hate speech, a conflict of interest). Flagging a review you simply disagree with rarely goes anywhere. This calculator assumes your existing reviews stay exactly as they are — you're outweighing the low ones with new 5★ reviews, not erasing them.
That depends entirely on your review velocity, not on this calculator — the number above is how many 5★ reviews you need, not how fast you'll get them. If you're currently getting, say, 8 new 5★ reviews a month, divide the number above by 8 for a rough month estimate. And because the math assumes every new review is a perfect 5, a single 4★ or 3★ along the way pushes the real number higher than what's shown here.
Often, yes — in trust terms, not just math terms. A 5.0 average with only a handful of reviews can look suspicious to someone comparing options (it reads as new, incentivized, or filtered), while a 4.7-4.9 average backed by real volume reads as authentic — every real business collects the occasional average review. Past a certain point, more reviews at a strong-but-imperfect average outperforms a perfect score with a thin history.
No — this isn't a judgment call, it's against the rules. Buying or otherwise incentivizing reviews violates Google's Business Profile policies, and Google's abuse detection increasingly catches the patterns that come with it (bursts of reviews from related accounts or devices, for example). The usual outcome is bulk review removal or a suspended profile — which sets your average back further than if you'd never tried. Every number this tool shows assumes real reviews from real customers.
Because that's the only way to give you a real floor, not a fantasy number. The result shown is the minimum new 5★ reviews needed if nothing else changes. If you expect a realistic mix — mostly 5★ with an occasional 4★ — you'll need more reviews than the number shown, not fewer.
Want more 5★ reviews without doing this math every month?
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