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Rating models

Trimmed mean rating calculator

Calculate an average after removing an equal share of the lowest and highest ratings.

Model estimate, not a platform prediction. Results may differ from real service ratings. Platforms can use unpublished weights, moderation, eligibility rules and rounding. This calculator applies only the formula below.

Your inputs

Reset example
Trimmed mean rating · model result
4.625 / 5

10 reviews removed from each tail; 80 of 100 reviews remain.

Results are rounded to three decimal places.

How it works

Remove floor(total × trim% ÷ 100) reviews from each tail, then average the remaining reviews.

The trim percentage applies to each tail separately. At 10%, up to 20% of reviews are removed in total. Counts are rounded down per tail. Removing extreme ratings can also exclude legitimate feedback; this is an analytical model, not fraud detection.

Results update as you type. Calculations run in your browser; submitting with JavaScript disabled sends the numbers to the server to calculate the result.

Reach a target

Minimum additional 5-star reviews. Both panels use the assumptions above. Existing reviews are not edited or removed except by this method’s time window or trimming rule.

0

additional reviews needed

Simulate new ratings

4.670 / 5

11 reviews removed from each tail; 88 of 110 reviews remain.

Calculation URLs contain the submitted numbers. Anyone with the URL can view them; opening it sends them to the server. Avoid sharing confidential figures. Privacy details.

Other rating methods