A review gap calculator shows how far behind your Google reviews are compared with a competitor. Reviews affect whether people call you, and they also affect how often your business appears in the Map Pack. This free tool shows the number of reviews you are missing, your rating gap and how many months you need to close the gap at your current pace.
Enter your numbers and the nearby competitor numbers below. You can find both on their Google Business Profile in a few seconds.
Compare your reviews
Why reviews matter for local SEO
For local businesses, reviews do two jobs. The first is ranking. Google uses review count, rating, recency and the words customers use to decide which businesses appear in the Map Pack, the three-business box that shows above normal search results for many local searches. The second job is trust. When two businesses appear next to each other, most people call the one with more reviews and a higher rating, even when the prices are the same.
A review gap is therefore a lead gap. If a competitor has 90 reviews and you have 30, each month that gap stays open, some of the people searching in your area call them instead of you.
What the calculator measures
- Review gap: the competitor’s review count minus yours. This is the number of reviews you need to match them today.
- Time to match: the gap divided by your monthly review pace. This assumes the competitor does not add new reviews. In real life they probably will, so use the number as a minimum.
- Rating gap: the difference between the two average ratings. A small difference matters less than the number of reviews, but a large rating gap is a warning sign for customers reading the profile.
Worked example
A roofing company has 42 reviews with a 4.6 rating. The nearest competitor has 96 reviews with a 4.8 rating. The gap is 54 reviews. The roofer gets about 6 new reviews a month. The time to match is 54 ÷ 6 = 9 months, and the rating gap is 0.2 stars. The owner now has a clear target: 6 reviews a month from completed jobs, plus replies to every review. That is a plan, not a guess.
How to close the review gap honestly
Google does not allow fake reviews, paid reviews or reviews written by staff. Accounts that break these rules can lose their reviews or their profile. The safe way to grow reviews is a simple routine:
- Ask at the right moment. Ask right after the job is finished and the customer is happy, not weeks later.
- Make the link easy. Send the direct review link by text or email. Customers who must search for your profile often give up.
- Ask for details. Ask customers to mention the service and the area in their review. Reviews with service words help your profile appear for those searches.
- Reply to every review. Reply to good and bad reviews within a day or two. Replies show that you are active and listening.
- Track the monthly count. Use the calculator once a month and watch the gap shrink.
What to do about a negative review
One bad review will not sink a business, but a pattern will. Reply calmly, apologise where a mistake happened, and offer to fix it offline. Do not argue in public. If a review breaks Google’s rules, for example it is spam or about a person you have never served, report it through the Business Profile. Removal is not guaranteed, so focus most of your effort on getting more real reviews.
Common mistakes
- Comparing your business with a much larger competitor in another city. Use the nearest competitor that appears in the same local results.
- Counting only the number of reviews and ignoring the last review date. An old profile with no new reviews looks inactive.
- Buying reviews or asking staff to post them. This is a serious risk to your profile.
- Ignoring reviews that mention a problem. Those reviews show what to fix in your service.
How the review gap connects with leads
The review gap tells you how many people you are missing in the Map Pack. The Cost Per Lead Calculator tells you what each enquiry costs. Put the two together and you can estimate the value of closing the gap. Our Ranking Drop Revenue Loss Calculator shows the revenue lost when rankings fall, and the SEO vs Google Ads Calculator compares the cost per lead of organic search with paid ads.
Pros and cons of this calculator
The review gap calculator shows how far you are from a competitor on review count. Use it to set a monthly target, then check the reviews that name your service and area.
Pros
- Shows the exact number of reviews you need to close the gap with a competitor.
- Makes review requests a measurable task instead of a vague goal.
- Useful for local businesses in the Map Pack, where review count is a visible trust signal.
- Quick to rerun each month to see progress.
Cons
- Review count is only one signal. Rating, recency and service words in reviews also matter.
- Competitor numbers change, so the gap moves even when you do nothing.
- Does not tell you how many customers will actually leave a review.
- Asking for too many reviews in a short time can trigger Google filters, so pace the requests.
Use the pros and cons together with the numbers above. A result is only as good as the inputs, so check your lead and spend figures against your real records before you make a budget decision.
Frequently asked questions
How many reviews do I need?
There is no fixed number. The right target is the number your nearest competitors have, plus a few more. Check the top three businesses in your local results, not only one.
Does a higher rating always win?
Not always. A business with 4.5 stars and 200 recent reviews often beats a business with 5.0 stars and 6 reviews. Count and recency matter alongside the rating.
How often should I check the gap?
Once a month is enough for most businesses. If you start a new review routine, check it every two weeks for the first two months.
Reading your results
A small gap, for example under 10 reviews, is usually easy to close in a few months with a steady routine. A gap of 50 reviews or more needs a longer plan, and it is worth checking whether the competitor is also growing fast. If their review count rises by 10 a month, your target moves with them. Watch the gap over three to six months rather than one month, because one busy week can change the numbers.
If your rating is lower than the competitor’s, look at the most recent reviews first. Recent complaints show what customers feel today, and fixing a process often improves the next reviews faster than asking for more of them.
Next steps
If the gap is large, start with the review routine today. Then use the Cost Per Lead Calculator to see what your enquiries cost. For a full check of your Google Business Profile, reviews and local pages, read our local SEO for home services guide or contact us through the SEO audit service page.