5 Star Rating Calculator
Calculate your 5-star rating average and find out exactly how many new Google reviews you need to reach your target. Enter your current stats below.
Calculate your reviews
Enter your current stats and your goal
How does it work?
Enter your stats
Type in your current number of Google reviews and your average star rating.
Set your goal
Choose the star rating you want to achieve. Most businesses aim for 4.5 or higher.
Get your number
See exactly how many new 5-star reviews you need to reach your target rating.
Frequently asked questions
How do you calculate a 5-star rating average?▾
To calculate a 5-star rating average, multiply each star level by the number of reviews it received, add the totals, and divide by the total number of reviews. For example: if you have 10 five-star, 5 four-star, 3 three-star, 1 two-star, and 1 one-star review, the calculation is (10x5 + 5x4 + 3x3 + 1x2 + 1x1) / 20 = 4.1 stars. This calculator does the math for you and also tells you how many new 5-star reviews you need to reach a higher target.
How is the number of needed reviews calculated?▾
The calculator uses a weighted average formula. It takes your current total star sum (reviews x average rating) and calculates how many additional 5-star reviews are needed to bring the average up to your target. The formula is: n = (target x current_count - current_sum) / (5 - target).
Does this work for other platforms too?▾
Yes! The math is the same for any platform that uses a 1-5 star average: Google, Trustpilot, Facebook, Yelp, TripAdvisor, and others. Just enter your current stats from any platform.
Can I realistically get that many 5-star reviews?▾
Most businesses only ask happy customers for reviews, which is why the calculator assumes 5-star reviews. With a systematic approach like automated feedback collection and smart routing, businesses typically see review rates increase by 3-5x. Tools like RateMind help by automatically asking customers for feedback after their experience and directing satisfied ones to your review platforms.
Why is my Google rating important?▾
Your Google star rating directly impacts your local search ranking, click-through rate, and customer trust. Businesses with 4.5+ stars get significantly more clicks, calls, and visits. A 0.5-star improvement can increase revenue by 5-9% according to research from Harvard Business School.