Google Review Rating Calculator
See exactly how many new reviews it takes to lift your Google star rating — then start collecting them.
That lifts you to 4.70★ across 320 reviews.
Start collecting reviews with Reviews WallWhy your Google rating matters
A stronger Google rating earns more trust, more clicks, and more customers from the exact same traffic. Here is why the number on this page is worth chasing.
Star ratings decide who gets clicked
People compare a handful of businesses on Google before choosing one, and the star rating is often the tie-breaker. Even half a star can be the difference between a customer picking you or scrolling to a competitor.
The more reviews you have, the harder it moves
Your rating is an average, so one 5-star review shifts a 20-review business far more than a 500-review one. The longer you wait, the more new reviews it takes to move the number — the best time to start is now.
A higher rating makes everything work harder
When your rating climbs, more of the people who already find you actually call, book, or buy. Reviews are one of the cheapest ways to lift conversion from the traffic, ads, and listings you already pay for.
How the Google review rating calculator works
This free Google review rating calculator shows exactly how many new reviews you need to reach a target star rating on Google. Enter your current Google rating, your current number of reviews, and the rating you are aiming for, and it instantly works out how many new 5-star reviews it takes to get there.
The math is simple. Your star rating is the average of every review you have ever received, so you cannot change old reviews — you can only add new, higher ones. The formula the calculator uses is:
Reviews needed = (current reviews × (target − current rating)) ÷ (new review rating − target)Because you cannot leave a fraction of a review, the result is always rounded up to the next whole review — so the number you see is the minimum it takes to tip your average over the line.
How to raise your Google star rating
Three things move your Google rating: how many reviews you have, how good they are, and how consistently new ones arrive. If you are sitting at 4.2 stars and want to reach 4.7, you do not need to delete anything — you need a steady stream of happy customers leaving 5-star reviews. The hard part is asking at the right moment and making it effortless.
Reviews Wall invites every customer to leave a public review after a good experience, turns leaving a Google review into a one-tap action, and gives anyone who had a problem a private way to reach you directly — so you can resolve it and make it right. More customers asked, more reviews collected, and a rating that climbs on its own.
Frequently asked questions
How many reviews do I need to raise my Google rating?
It depends on your current rating, how many reviews you already have, and your target. Use the calculator above — for example, a business at 4.2 stars with 120 reviews needs roughly 200 new 5-star reviews to reach 4.7. The more reviews you already have, the more new ones it takes.
Can I increase my Google rating without removing bad reviews?
Yes. You cannot delete genuine reviews (and you should not try to), but you can lift your average by consistently earning new, higher-rated reviews. Over time a steady flow of fresh 5-star reviews outweighs older low ones.
Why does it get harder to improve my rating over time?
Your rating is a simple average, so every review counts equally. With 20 reviews, one new 5-star review moves the number a lot. With 1,000 reviews, that same review barely registers — which is exactly why it pays to start collecting early.
Is a perfect 5.0 Google rating realistic?
A flawless 5.0 is very hard to hold once you have more than a handful of reviews, because a single 4-star review pulls the average below 5. Most strong businesses aim for a believable 4.7 to 4.9 instead, which this calculator can plan for you.