Google Review Calculator
Calculate your average rating and determine how many 5-star reviews needed to reach your target rating.
Review Distribution
Result
Star Rating
Summary
Frequently Asked Questions
How is Google rating calculated?
Google rating is calculated as a weighted average: (Sum of (Stars × Number of Reviews)) ÷ Total Reviews. For example, 10 five-star and 2 one-star reviews = (10×5 + 2×1) ÷ 12 = (50+2)÷12 = 4.33 stars.
How many 5-star reviews do I need to reach 4.5 stars?
It depends on your current rating and total reviews. If you have 50 reviews at 4.2 stars (total 210 points), you need about 30 additional 5-star reviews to reach 4.5 stars. Use our Target Rating Planner for accurate calculations.
How much does one 1-star review affect my rating?
A single 1-star review affects your rating based on your total review count. With 100 reviews at 4.5 stars (450 points), adding a 1-star review creates 451 points over 101 reviews = 4.47 stars (a 0.03 drop). With fewer reviews, the impact is larger.
What is a good Google rating?
Generally:
- 4.5-5.0 stars: Excellent - Highly recommended
- 4.0-4.4 stars: Very Good - Trustworthy
- 3.5-3.9 stars: Average - Some concerns
- Below 3.5 stars: Poor - Customers may avoid
How many reviews does Google show?
Google shows all reviews, but the rating displayed is calculated from all reviews (including those not shown in the snippet). Google may filter suspicious reviews, but most legitimate reviews are counted.
Can fake reviews affect my Google rating?
Yes, fake positive reviews artificially inflate your rating, while negative fake reviews damage it. Google has algorithms to detect and remove fake reviews, but they can temporarily affect your rating. Always encourage genuine customer feedback.
How often does Google update ratings?
Google updates business ratings in real-time as new reviews are posted. The change may take a few minutes to appear publicly, but the calculation is immediate.
Do Google remove old reviews from calculation?
No, Google includes all reviews in the rating calculation unless they are removed for policy violations. Older reviews remain in the average, which is why established businesses have more stable ratings.