Average rating calculator

Enter how many 1–5 star ratings you received and get the average rating, the share of 4–5 stars and the share of low ratings. Handy for reviews after a purchase, a delivery, a support chat or a visit.

Average rating — a weighted score in which every star value is multiplied by the number of reviews that gave it.

Calculation FAQ

Number of ratings

1 star

A very poor rating

2 stars

A low rating

3 stars

An average rating

4 stars

A good rating

5 stars

An excellent rating

Average rating

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Result

stars out of 5

Interpretation

Change the inputs to recalculate.

In SurveyNinja, NPS, CSAT and more are calculated automatically. Create a survey in 5 minutes and get real-time analytics.

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Data is not stored — calculation runs in your browser.

How the average rating is calculated

Formula

Rating = (1 × ratings of 1 + 2 × ratings of 2 + … + 5 × ratings of 5) / all ratings.

Rating

The average is convenient for a storefront and for trends, but read it together with the number of reviews.

Share of 4–5

Shows how many customers are clearly satisfied. A close relative of the CSAT top-2.

Low ratings

The share of 1–2 stars quickly shows the risk of returns, complaints and negative reviews.

Calculation examples

1 Reviews after delivery

1: 6

2: 9

3: 21

4: 54

5: 73

A rating above 4 with a large share of 5 stars is a good sign, but the 1–2 stars are worth breaking down by reason.

2 Support agent rating

1: 4

2: 5

3: 18

4: 70

5: 92

A high rating confirms the quality; review the low ratings by ticket tag.

What to avoid

Ignoring the number of reviews 4.8 from 10 reviews and 4.5 from 2,000 reviews support very different conclusions.
Comparing different touchpoints A delivery rating and a product rating answer different questions. Keep the sources apart.
Skipping the comments The number shows the scale of a problem; the reason usually sits in the comments.

Frequently asked questions

How is a rating different from CSAT?

A rating is usually a public 1–5 score. CSAT is a method for measuring satisfaction right after a specific experience.

Can I calculate a rating on an incomplete scale?

Yes, if you know the number of ratings for every available point. Just do not compare different scales directly.

Why track the share of 4–5 separately?

The average can stay high thanks to a group of loyal customers. The top-2 share shows how many are clearly satisfied.

What counts as a good rating?

It depends on the market. For public reviews 4.5+ is usually seen as strong, but the trend and the number of reviews matter as much.

Can I use it for a marketplace?

Yes. It works for product pages, delivery, seller support and post-purchase surveys.

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