TrustScore calculator: how many 1-star reviews would need to come down?
Enter your score, your review count and the score you want. You will see how many 1-star reviews would need to come down to get there, under a plain average, with the formula. Nothing you enter is stored or sent.
100% risk-free. You only pay for the reviews that come down.
How many 1-star reviews do I need removed to raise my TrustScore?
Under a plain average, it is your review count times the gap between your target and your score, divided by the target minus one. A profile with 1,842 reviews at 3.7 needs about 335 one-star reviews gone to reach 4.3. Trustpilot weights recent reviews more, so treat it as an estimate.
Result
1-star reviews that would need to come down
335
- Average after
- 4.30
- Reviews left
- 1,507
- Share of all your reviews
- 18.2%
Removals only happen for reviews that break a rule; the free audit tells you how many of yours do.
The formula, and how to do it by hand
A profile has N reviews that average S. Take away k reviews of 1 star each, and the new average is (S × N − k) divided by (N − k). Set that equal to your target T and solve for k:
k = N × (T − S) ÷ (T − 1), rounded up
Take the example profile used across this site: 1,842 reviews at 3.7, with a target of 4.3. That is 1,842 × 0.6 ÷ 3.3, which is 334.9, so 335 removals. The 1,507 reviews left average 4.3.
| Current score | Reviews | Target | 1-star removals needed | Share of all reviews |
|---|---|---|---|---|
| 3.7 | 1,842 | 4.3 | 335 | 18.2% |
| 3.9 | 400 | 4.2 | 38 | 9.5% |
| 4.1 | 200 | 4.3 | 13 | 6.5% |
| 2.8 | 60 | 4.0 | 24 | 40.0% |
Examples with made-up profiles. The smaller the profile, the fewer removals a given rise takes.
What the number does and does not tell you
On Trustpilot it is a sense of scale. Trustpilot says TrustScore is not a simple average. Newer reviews weigh more, and every calculation includes 7 neutral reviews worth 3.5 stars. Removing a recent 1-star review moves the score more than removing an old one. Our guide to the three factors behind TrustScore has the detail, and our guide to the score where sales start to drop helps with choosing a target.
On Google it is exact. Google says its review score is the average of all ratings published for the place.
It is not a count of what can come down. Removals only happen for reviews that break a rule; the free audit tells you how many of yours do. Read what qualifies on the Trustpilot review removal and Google review removal pages, then price the result with the removal cost calculator. To see the path month by month, with new reviews coming in too, use the rating recovery planner.
Questions about the calculator
Under a plain average, the number is your review count times the gap between your target and your score, divided by the target minus one. A profile with 1,842 reviews at 3.7 needs about 335 one-star reviews gone to reach 4.3. Trustpilot's real formula weights recent reviews more, so the true number differs. Source: TrustScore explained.
Trustpilot says TrustScore is not a simple average. Newer reviews count for more than older ones, and every score includes 7 neutral reviews worth 3.5 stars. Removing a recent 1-star review moves the score more than removing an old one. Our guide to how Trustpilot calculates TrustScore explains the three factors.
Yes, and there it is exact. Google says its review score is the average of all ratings published for the place. Enter your Google rating, your number of ratings and your target. Google also says a changed score can take up to 2 weeks to show. Source: review scores.
No. Removals only happen for reviews that break a rule. The calculator tells you how many would need to come down. It cannot tell you how many of yours break a rule. The free audit counts those.
No. It runs in your browser and sends nothing. The numbers sit in the page address, so you can copy the link and share a result. It never asks for your brand.
Primary sources used on this page
- TrustScore and star rating explained. Trustpilot Help CenterLast verified
- Understand review scores for local places & businesses. Google Business Profile HelpLast verified
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- Google rating calculator: how many 5-star reviews do you need?
- We remove 1-star Trustpilot reviews for supplement brands. Pay only for what comes down.
- Resources: guides, tools and data for getting Trustpilot reviews removed
- Guides to Trustpilot review removal
- Glossary of Trustpilot review removal terms
Our tools and the free audit share one rule check, a transparent heuristic. How the rule check works explains what it looks for and what it cannot know.
The calculator gives the number you need. The audit gives the number you have.
Send your Trustpilot or Google profile link. We read every 1-star and 2-star review and tell you how many break a rule. The audit is free.
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