One of the most common questions business owners ask is: "How many 5-star reviews do I need to reach the next rating level?" The answer depends on your current score and total number of reviews.
The Math Behind Review Milestones
To figure out how many 5-star reviews you need to reach a target score, the formula accounts for Google's rounding: (current_weighted_sum + 5 × new_reviews) ÷ (current_total + new_reviews) ≥ target − 0.05
Key Insight: It Gets Harder as You Grow
The more reviews you have, the more new 5-star reviews you need to move up. A business with 50 reviews at 4.3 needs about 11 new 5-star reviews to reach 4.5, while a business with 500 reviews at 4.3 needs about 109.
Calculate Your Exact Number
Use our free Google review calculator to enter your star counts and instantly see how many 5-star reviews you need for each milestone.