Google review calculator

Google takes the plain arithmetic mean of every published review, adding all the star ratings together and dividing by the number of reviews, then displays it to one decimal place. Every review counts equally, however old or short it is. Reviews that Google filters as spam are left out of the total entirely.

It depends only on the average you are defending, not on how many reviews you have. At a 4.0 average it takes 3 five-star reviews; at 4.5 it takes 7; at 4.8 it takes 19. The formula is (your average − 1) ÷ (5 − your average), rounded up. The calculator above works it out for your exact rating.

Enough to close the gap between where you are and where you want to be, scaled by the reviews you already have. 47 reviews at 4.2 need 29 new five-star reviews to reach 4.5. The same business at 4.4 needs only 10. The more reviews you hold, the more each new one is diluted.

Nothing changes mechanically, since there is no badge and no ranking switch at 100. What changes is inertia: at 100 reviews a single bad one moves your average by about 0.03, so the rating becomes stable. It also passes the point where most people stop wondering whether the reviews are real.

reviews needed = current reviews × (target − current rating) ÷ (new review rating − target). For 47 reviews at 4.2 aiming at 4.5 with five-star reviews: 47 × 0.3 ÷ 0.5 = 28.2, rounded up to 29. Always round up, since 28 would leave you just short of the target.

Roughly (your review count ÷ 10) ÷ (5 − target) new five-star reviews for each 0.1 of a star. In practice a listing with 50 reviews at 4.3 needs about 9 to reach 4.4, while the same listing with 500 reviews needs about 84. Raising a rating gets harder as the listing grows, which is why it is worth fixing early.

There is no threshold, and anyone quoting one is guessing. Google ranks the map pack on relevance, distance and prominence, and reviews feed prominence alongside your rating, how recently you were reviewed and whether you reply. In practice, matching or beating the review count of the businesses currently in the pack for your search is a more useful target than any absolute number, because the bar is set by your competitors rather than by Google.

It affects local search rather than classic organic ranking. Your star rating and review volume feed the prominence signal for the map pack, so they change where you appear for searches near you. They do not directly move a blue link on page one. The indirect effect is real though: a higher rating earns more clicks from the same position, and click behaviour is something Google watches.

Google rounds to one decimal place for display but works from the underlying mean. So 4.45 and 4.54 both show as 4.5 while being meaningfully different, and one review can flip the displayed number without changing much underneath. Aim slightly past a milestone rather than exactly at it.

Usually a few minutes, sometimes a few hours. Reviews containing links, photos or unusual wording take longer while Google's spam checks run, and a small share are filtered and never appear at all. If a review is still missing after a couple of days, it has most likely been filtered rather than delayed.

Only if it breaks Google's policies, meaning spam, a conflict of interest, off-topic content, or a review of a different business. A review cannot be removed for being unfair or inaccurate. Report it from your Business Profile, and reply publicly in the meantime, because the reply is what future customers actually read.

One short message with a direct link, within a day of the purchase, on a channel people actually open. WhatsApp outperforms email heavily here, because messages get read and get replied to. Never offer anything in exchange, since Google removes incentivised reviews and can penalise the listing. Spur can send the ask automatically after an order.