How to use this calculator
Calculate your current positive-review percentage and how many additional positive reviews are needed to reach a target.
How the calculation works
- Adds positive and negative reviews to get total reviews.
- Divides positive reviews by total reviews for the current percentage.
- Solves for the number of additional positive reviews needed to reach the target.
Formula
Needed positives = ceil((target x total reviews - positive reviews) / (1 - target)).
Example
800 positive and 200 negative reviews is 80% positive. Reaching 85% takes 334 additional positive reviews.
Understanding your result
Use the needed review count to understand the math behind a target percentage. It does not predict whether future reviews will be positive.
Assumptions and limitations
- A 100% target is impossible after any negative review exists.
- This does not predict future review behavior; it only calculates the math from your inputs.
Frequently asked questions
Does this predict future reviews?
No. It only calculates the number of additional positive reviews needed under the current totals.
Can every target be reached?
No. A 100% target is impossible once negative reviews exist.