Weighted Rating Calculator
Calculate the true weighted average rating from multiple review sources. Weight ratings by number of reviews, reviewer credibility, or importance to get an accurate composite rating.
Data Entry
Quick Presets
Computation Flow
LiveWeight Distribution
LiveValue Comparison
LiveResult Gauge
LiveWeighted Rating Calculator
Enter ratings and review counts from different sources to get the true weighted rating.
What Is a Weighted Rating ?
Understanding Weighted Ratings
A weighted rating combines ratings from multiple sources where each source is weighted by its number of reviews or credibility. A 4.8★ rating from 10,000 reviews carries more weight than a 5.0★ from 3 reviews.
Why Simple Average Ratings Mislead
If Product A has 4.5★ from 5,000 reviews and 2.0★ from 5 reviews, the simple average is 3.25★. But the weighted rating is 4.497★ — much more accurate and fair.
Interactive Balance Beam
Drag SlidersHow to Use the Weighted Rating Calculator
Enter Your Values
Type each data point into the 'Value' column. These are the ratings you want to weight.
Assign Weights
Enter the reviews for each value. The calculator accepts any positive numbers as weights.
View Results
The calculator computes your result instantly. See the weighted result, sum of products, sum of weights, and interactive charts update in real time.
Weighted Rating Formula
The Weighted Rating Formula Explained
The weighted rating formula: multiply each value by its weight, sum those products, then divide by the total of all weights.
Try the Formula Live
Live Formula — Edit Values
InteractiveHow the Calculator Computes Weighted Rating Step by Step
Inside the Weighted Rating Calculator
Values
Weights
Step 1: List values and weights
Enter each value alongside its weight. For example: Amazon 4.5 (weight 5000), Walmart 3.8 (weight 1200), Best Buy 4.9 (weight 300).
Step 2: Multiply each value by its weight
4.5 × 5000 = 22500, 3.8 × 1200 = 4560, 4.9 × 300 = 1470.
Step 3: Sum all the products
22500 + 4560 + 1470 = 28530.
Step 4: Sum all the weights
5000 + 1200 + 300 = 6500.
Step 5: Divide to get the result
28530 ÷ 6500 = 4.39.
Common Weighted Rating Mistakes
Using simple average when weights differ
When values have unequal importance, simple averaging misleads. This calculator weights correctly.
Dividing by count instead of total weight
Always divide by the sum of weights, not the number of values.
Swapping values and weights
Putting values in the weight column produces wrong results. The labeled columns prevent this.
Correct approach
Multiply each value by its weight. Sum products. Sum weights. Divide. The calculator automates this.
Weighted Rating Examples
Weighted Rating Example 1
Use the weighted rating calculator to compute weighted results. Edit values below.
The weighted result accounts for different weights across categories, giving a more accurate composite than a simple average.
Weighted Rating Example 2
Another real-world example. Edit values to see the result update instantly.
The weighted result reflects the true composite value when different sources have different levels of importance or volume.
Where Weighted Rating Is Used
E-Commerce Products
Aggregate product ratings from Amazon, Walmart, and Best Buy weighted by number of reviews for a fair overall score.
Restaurant Reviews
Combine Yelp, Google, and TripAdvisor ratings weighted by review count to find the true restaurant quality.
Mobile App Reviews
Merge App Store and Play Store ratings by download volume to gauge actual user satisfaction across platforms.
Employee Feedback
Weight 360° review ratings from managers, peers, and direct reports based on reviewer proximity and credibility.
Important Weighted Rating Notes
Weights must be positive. The calculator requires positive weights. A weight of zero excludes that value entirely.
Equal weights = simple average. If every value has the same weight, the weighted result equals the simple average.
Result always falls between min and max values. No matter the weight distribution, the result will always be between the smallest and largest values.
Larger weights dominate the result. The larger a weight relative to the total, the more the result is pulled toward that value.
Explore Our Calculator Tools
Fifteen purpose-built weighted average calculators — each tailored to a specific domain with unique inputs, outputs, and interactive visualizations.
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Statistics Calculator
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Mean Calculator
Compute the weighted arithmetic mean from data values with different frequencies or importance weights.
Score Calculator
Compute composite scores from weighted categories for rubrics, tests, and evaluations with letter grades.
Price Calculator
Calculate VWAP, average purchase price, and procurement costs weighted by quantity or volume.
Return Calculator
Compute true portfolio returns by weighting each asset's performance by its dollar allocation.
Rating Calculator
Combine ratings from multiple review sources weighted by review count or credibility.
Interest Calculator
Compute blended interest rates across loans, savings, and credit lines weighted by balance.
Profit Calculator
Analyze blended profit margins across products, services, and segments weighted by revenue.