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Review Rating Calculator

Your Google rating is simple arithmetic — which means you can calculate exactly what it takes to move it. Enter your current review count and average to see how many five-star reviews reach your target, and why the road back from a low rating is longer than most owners expect.

At a glance

What it does, what it reads, what it cannot see

Every tool on this site states its scope in the same six lines, so you know what a result means before you act on it.

You enter
Current review count and average, and a target average
You get
How many five-star reviews reach the target, and what the average becomes after a given number of new reviews at any rating
It reads
Nothing beyond the form
It cannot see
Google’s displayed rounding and any filtered reviews; it is arithmetic on the figures you enter
It takes
Instant
Worked example

This tool’s own output on a fictional business

Generated by the tool at build time
Current
140 reviews, 4.6 average
Target
4.8
1405-star reviews needed to reach 4.8
4.63Average after 10 more 5-star reviews
4.56Average after 10 more 4-star reviews

How to read it

The arithmetic is unforgiving at volume: with 140 reviews already, 140 more five-star reviews are needed to move the displayed average from 4.6 to 4.8, and ten of them move it by only 0.03. That is why the reviews page on this site talks about the rate of new reviews and the response to them rather than the average, and why a young competitor's 5.0 from twelve reviews is not the threat it looks.

Meadowbank Dental is a fictional practice written for these examples: the result above is what this tool’s code produces on that page, regenerated whenever the site is built, and is not a real business’s data.

How it works

What this tool measures, and what it leaves alone

Read this before you act on a result. Every tool here states its method and its limits in the same breath.

The maths, honestly

Your displayed rating is the sum of all star ratings divided by the count. Moving it therefore gets harder the more reviews you have: a practice on 3.8 from 40 reviews needs 56 consecutive five-star reviews to display 4.5 — more than doubling its review count. This is why protecting a good rating is far cheaper than repairing a bad one, and why review collection needs to be systematic, not occasional.

Note that Google displays ratings rounded to one decimal place and may weight or filter reviews in ways it does not publish — the calculator shows the true arithmetic average, which is the number you can actually influence.

What moves the number in practice

Volume and recency beat perfection: a 4.7 from 300 recent reviews will usually look more established and more credible to buyers than a 5.0 from 9 old ones, because volume reads as evidence. Build the ask into the job — link sent by text at the moment of completion (our review link generator makes the one-tap link) — and reply to everything, especially the bad ones: your reply is read by every future customer.

Questions

Common questions

Should I try to get back to 5.0?

If you have any review below 5 stars, a displayed 5.0 is mathematically unreachable — the average can approach but never hit it. Chasing 4.8–4.9 with strong volume is the right target, and reads as more credible to buyers anyway.

Can I remove bad reviews?

Only Google removes reviews, and only for policy violations (fake, spam, conflict of interest, prohibited content) — being unfair or exaggerated is not enough. Flag genuine violations in your Business Profile dashboard, reply professionally to the rest, and outweigh them with volume.

Related

Free tools that go with this one

Each one measures rather than guesses, works without an account, and says so when something cannot be measured.

Review Link Generator

The single biggest reason customers do not leave reviews is friction.

Website Visibility Checker

Enter your website address and get a measured, evidence-based report in about fifteen seconds: your HighRegard Website Score across seven areas, what is holding you back, and what to fix first.

GBP UTM Builder

Without tagging, much of your Google Business Profile traffic hides inside "direct" or generic "google / organic" in analytics — so you never learn what your profile actually produces.

If you need more than the tool

The maths shows the size of the job. Collecting reviews consistently — and having a website that converts the trust they build — is the part we help with.

Free Snapshot

Not sure the findings matter? A person checks your website and sends three specific, evidenced fixes — free, no call, no obligation.

Website Revenue Audit — £295

The full picture: up to ten pages and your customer journey checked by a person, every finding evidenced, every fix written so you or your developer can do it.

Repair Sprint — £795

No developer, no time, no interest in doing it yourself? The audit plus up to twelve fixes implemented for you, with a full change log.

And when the whole system needs rebuilding — website, trust evidence, local and AI visibility together — the founder-led HighRegard Authority Transformation (£7,495, 8 weeks, application only) is the complete version.

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