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Weighted Rating Calculator

Combine ratings from several sources, weighted by how many reviews back each one, into a single blended rating instead of a misleading straight average.

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Enter the rating (out of 5) and number of reviews for each source you want to combine. Leave a row's count at 0 to ignore it.
Weighted average rating
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Simple average (unweighted)
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Built by Rankite, the SEO team behind Swordfish AI's +400% revenue and Zluri's +45% organic growth. See the case studies

The formula behind the blended rating

The weighted average multiplies each source's rating by its review count, adds those products together, then divides by the total number of reviews across all sources. A source with 500 reviews at 4.2 stars pulls the blended number toward 4.2 far more than a source with 8 reviews at 5 stars, which is exactly the point: a rating backed by more reviews is more statistically reliable and should carry more influence over the combined score.

Why a simple average can mislead

A simple average treats every source equally regardless of how many reviews back it, so a platform with 3 five-star reviews counts exactly as much as one with 800 reviews averaging 4.3 stars. This tool shows both numbers side by side specifically so you can see how much that unweighted approach would overstate or understate your real standing once review volume is accounted for.

Using a blended rating honestly

A blended rating across platforms, like Google, Facebook, an industry directory and your own site, can be a useful internal benchmark for tracking overall reputation over time. It should not be presented publicly as if it were a single platform's official rating, and each platform's own review widget should still show that platform's real, unmodified rating and count.

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FAQ

Weighted Rating Calculator: questions, answered

Why does a weighted average differ from a simple average?
A simple average treats every source the same regardless of how many reviews back it. A weighted average gives more influence to sources with more reviews, since a rating built on hundreds of reviews is more statistically reliable than one built on a handful.
What happens if I leave a source's review count at 0?
That source is excluded from both the weighted and simple average entirely, so you only need to fill in the sources you actually want combined. Leaving the default example rows at 0 for count removes them cleanly.
Can I use this for more than star ratings out of 5?
The calculation itself works for any consistent numeric rating scale, but the input fields here are capped between 0 and 5 to match the common 5-star review format used by Google, most marketplaces, and most review platforms.
Is it accurate to publish this blended number as my official rating?
Treat it as an internal benchmark for tracking your overall reputation across platforms over time, not as a replacement for each platform's own displayed rating, which should always show that platform's real, unmodified number.
Does this calculator store the ratings I enter?
No. The calculation runs entirely in your browser using the numbers currently in the fields. Nothing is saved, uploaded or sent anywhere, refreshing the page resets it to the example values.

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