Enter the number of votes for each star level — 5 stars, 4 stars, 3 stars, 2 stars, and 1 star — and the Average Rating Calculator computes your weighted mean rating out of 5. You also get the total vote count and a visual breakdown of how votes are distributed across each star tier.
Average Star Rating
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Total Votes
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5-Star Share
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1-Star Share
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A star rating system is a classification method that uses stars (or similar symbols) to represent the quality or satisfaction level of a product, service, or experience. Users assign a score — typically from 1 (lowest) to 5 (highest) — and those scores are aggregated to produce an overall average rating.
The average rating is a weighted mean. Each star level is multiplied by its vote count, all those products are summed, and the total is divided by the overall number of votes. The formula is: Rating = (5×r5 + 4×r4 + 3×r3 + 2×r2 + 1×r1) ÷ (r5 + r4 + r3 + r2 + r1).
The formula is: Average Rating = (5×[5-star votes] + 4×[4-star votes] + 3×[3-star votes] + 2×[2-star votes] + 1×[1-star votes]) divided by the total number of votes. This gives a single decimal number between 1.00 and 5.00 representing the overall satisfaction level.
Generally, a rating of 4.0 or above is considered good, and 4.5 or above is excellent. On platforms like Amazon or Google, most top-rated products cluster between 4.2 and 4.8. Ratings below 3.5 are typically seen as below average and may deter potential buyers or users.
To raise your average, you need a significant influx of 4-star and 5-star reviews. The higher your existing total vote count, the harder it is to move the needle. For example, if you have 100 votes at 3.5, you would need approximately 50 additional 5-star reviews to push the average close to 4.0. Focus on improving the product or service quality and actively encourage satisfied customers to leave reviews.
A simple mean would just average the star levels (1+2+3+4+5 = 3), which ignores how many people voted for each level. A weighted average accounts for the volume of votes per tier, so if 500 people gave 5 stars and only 5 people gave 1 star, the result accurately reflects that the majority of users had a great experience.
This specific calculator is designed for the standard 1–5 star rating system. For a 1–10 rating scale, you would need to extend the formula to include all 10 levels (10×r10 + 9×r9 + ... + 1×r1) divided by the total votes. A future version of this tool may support customizable rating scales.
If there are no votes entered across any star level, the total vote count is zero, making the average undefined. The calculator will display 0 votes and a 0.00 rating in that case to avoid a division-by-zero error. Make sure to enter at least one non-zero vote count to get a valid result.