How to improve your Google rating: the maths of the average and a realistic plan
A 4.2 doesn't sound bad — until you realise that guests filtering search results most often set the filter to "4.5 and up", and to part of your market you're invisible. Then the panic starts: how do you fix this? And how fast?
Here's the news you'll rarely hear: it's fixable, but slower than you'd like — which is why you should understand the maths before you make a plan. Let's start there.
How the Google rating is calculated
The displayed rating is the average of all published ratings on your profile, rounded to one decimal. No magic, no "recent reviews count more" — every star, including the one from five years ago, weighs the same.
Which is exactly the problem: old reviews have inertia. The more of them there are, the less each new rating moves the average. On a profile with 10 ratings a new five-star moves the needle visibly; on a profile with 500, barely at all.
The concrete arithmetic: how many five-stars?
Take a business with 50 reviews and a 4.2 average. The star total is 210. For the average to reach 4.5, you need (210 + 5×X) / (50 + X) ≥ 4.5 — where X is the number of new five-stars.
The answer: X = 30. Thirty consecutive five-stars, with not a single weaker rating along the way, for a three-decimal jump. A few reference points from the same formula:
- From 4.2 to 4.3: 6 five-stars.
- From 4.2 to 4.4: 14 five-stars.
- From 4.2 to 4.5: 30 five-stars.
- The same jumps on a profile with 200 reviews: four times as many.
Two lessons in that table. First: a rating is fixed by habit, not campaign — 30 reviews is six to twelve months of steady inflow for most small businesses. Second: the earlier you start, the easier it is — every year of delay adds inertia.
Why deletion isn't a shortcut
Every owner at 4.2 has the same first thought: "if only I could remove those few one-stars". Understandable — and mostly impossible: you can't delete other people's reviews, and only ones that violate Google's policies get removed. The honest one-stars stay — and the only things that work on them are dilution by new ratings and a good public reply, which doesn't change the rating but changes how readers interpret it.
The four-step plan
- Stop the source of the one-stars. Before collecting anything, read all your negative reviews in one sitting and look for the pattern — the wait, a particular shift, parking, billing. Thirty new five-stars are worth nothing while the one-star machine keeps running. Reviews are, incidentally, the cheapest quality research you'll ever get.
- Start a steady inflow of ratings. The well-timed ask, the link, the QR code — we've described the whole system. The goal isn't a record week but a review or two every week, for months. Reminder: rewards and guest-filtering are against the rules — shortcuts here risk the whole profile.
- Reply to everything. A profile where the owner visibly reads and responds gets more reviews (guests write where someone listens) and converts more readers into guests — how to do it well, plus ready-made examples.
- Measure monthly, not daily. The average moves by decimals, slowly. Track the number of new reviews per month and their average — those numbers respond immediately and tell you whether the system works. The displayed rating follows, with a lag.
One warning to finish
If someone offers you "50 reviews for €200" — that's not a shortcut, it's a time bomb: Google is good at detecting bought reviews and removes them in bulk, penalising the profile on top. Whatever you "gain" that way, you lose with interest.
The real formula is boring, and therefore reliable: fix what guests complain about, ask every happy guest for a rating, answer everything that arrives. Look at the average in six months — it will have moved. In a year — there'll be a different digit after the decimal point.