Rating Recovery Calculator
Enter your current rating, review count, and target rating to see exactly how many 5-star reviews it takes — the same formula explained in our guide.
New reviews needed to go from 3.8★ to 4.5★
Accurate for platforms with a simple average, like Google. See how the math works or why weighted platforms like Trustpilot differ.
Frequently asked questions
How is "reviews needed" actually calculated?
The math is: reviews needed = current review count × (target rating − current rating) ÷ (5 − target rating), rounded up. It assumes every new review is a 5-star, and it's exact for platforms with a genuine simple average — see how the math works for the full worked example.
Why does the number look different for Trustpilot or Yelp?
Because not every platform uses a plain average. Trustpilot's TrustScore is Bayesian and recency-weighted, Yelp algorithmically filters some reviews out of the count entirely, and a few platforms (Facebook, Booking.com, BBB) don't use a 1–5 star average at all. Use a platform-specific calculator below for a number tuned to that platform's actual mechanics.
Does this account for reviews I might lose along the way?
No — it assumes your existing reviews stay put and every new one is 5 stars, which is the best case. If you're also losing reviews or getting mixed ratings, the real number will be higher than what the calculator shows.
Platform-specific calculators
Every platform calculates its rating a little differently — these use each platform's actual mechanics instead of a generic formula.
Trustpilot
Google
Tripadvisor
Reviews.io
Sitejabber
G2
Capterra
Glassdoor
Indeed
Healthgrades
Zillow
Thumbtack
DealerRater
Houzz
HomeAdvisor
FindLaw
WeddingWire
CarGurus
RealSelf
RateMDs
Vitals
DesignRush
Hellopeter
Networx
Realtor.com
CustomerLobby
Yellow Pages
Google Play