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Google Review Rating Calculator

Work out how many 5-star Google reviews your practice needs to reach your target rating. Enter your current numbers below — the maths updates as you type.

Out of 5 stars
Total reviews you have today
What you want to reach
You need approximately
5-star reviews
From
★★★★☆
4.2 · 40 reviews
To
★★★★★
4.8 · 40+N reviews
This assumes every new review is a 5-star review. In reality you'll get a mix — most practices average 4.5–4.8 stars from new reviews. If your realistic average is lower, you'll need proportionally more.

FAQ

How is this calculated?
It's a straight weighted-average: new rating = (current_rating × current_count + 5 × N) / (current_count + N). Solving for N gives: N = current_count × (target − current) / (5 − target). We round up because you can't post half a review.
Why does it take so many 5-star reviews to move the needle?
Google weighs every review equally. If you have 100 reviews at 4.0, adding a single 5-star review barely nudges the average. The bigger your history, the heavier the anchor — which is why established practices with a low rating find it so hard to recover.
What if I get a 4-star review instead?
A 4-star review can still pull you up if your current rating is below 4 — but not as fast. If your current rating is already above 4, 4-star reviews pull you slightly down. This calculator assumes 5-star reviews only; reality is always a mix.
How long will it take to gather that many reviews?
It depends entirely on your patient volume and how actively you ask. Practices that systematically request a review after every visit typically collect 10–30 new reviews per month. Without a system, most practices collect 1–3 per month.
Can Fidelia help me get more reviews?
Yes. Fidelia sends automated, compliance-safe review request emails to your patients — plus a printable QR code for reception. Start a 7-day free trial to see the numbers move.

Ready to move the numbers?

Fidelia manages your Google reviews end-to-end — automated patient review requests, AI-drafted replies (GDC-compliant), map rank tracking, and competitor monitoring. For private dental and aesthetic clinics.

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