Review Score Calculator.

Trustpilot Score Calculator

Calculate how many reviews you need to improve your Trustpilot TrustScore

Total Reviews Reviews you currently have

💡 Pro tip: Most top businesses target 4.5–4.6 stars — it's the sweet spot for trust & conversions, and looks more natural.

Estimated 5-Star Reviews Needed

Estimated Investment

Estimate only. Trustpilot does not publish its exact scoring formula, so review age, recency, and rating mix can change the actual number needed.

78 % of the way to your goal

Get 20 Reviews for $ 340 Limited Time: Save $ 160 (15% OFF)

Results within 7-14 days | 30-day money-back guarantee

Need a deadline-based execution plan? Use the Review Velocity Planner .

The Math Behind Your Score

Understanding the formulas platforms use to calculate your rating helps you plan your review strategy more effectively.

Simple Average

Most platforms use a straightforward arithmetic mean . They sum all star points and divide by total reviews.

Average = Total Star Points / Total Reviews

Solve for new 5-star reviews needed (x)

x = n × (T − R) / (5 − T)

n = current reviews, R = current rating, T = target

4.6★ from 100 reviews → target 4.8★ → need 100 new 5-star reviews

Bayesian Average

Trustpilot adds 7 phantom reviews at 3.5 stars to prevent artificial scores. This means new businesses start at 3.5, not 0.

TS = (n × R + 7 × 3.5) / (n + 7)

This means your first review matters less

Not 5.0! The prior pulls it down.

Trustpilot requires more reviews than other platforms to reach the same target because of the Bayesian dampening.

Platform Comparison

A side-by-side look at how each platform handles ratings, pricing, and delivery.

Platform Scoring Method Price / Review Delivery

Trustpilot Bayesian (7 phantom) $20–25 7–14 days

Google Simple Average + Rounding $18–20 7–14 days

G2 Simple Average $28–30 7–14 days

Yelp Filtered Average $20–22 7–14 days

TripAdvisor Weighted Recency $22–24 7–14 days

Google Play Simple Average $6–8 3–7 days

ℹ️ Google rounds displayed ratings to the nearest tenth (e.g., 4.95 → 5.0). Yelp filters reviews algorithmically, so not all reviews count toward the displayed score. Trustpilot's Bayesian model means new businesses need more reviews to move their score.

Everything About Review Scores

Knowledge and strategies to optimize your online reputation.

What is a TrustScore?

A TrustScore is the average rating displayed on review platforms like Trustpilot, G2, Google, and others. It's calculated by averaging all star ratings from your reviews. For example, if you have ten 5-star reviews and five 3-star reviews, your TrustScore would be approximately 4.3 stars.

Your TrustScore directly impacts customer trust, conversion rates, and search rankings. Studies show that businesses with ratings above 4.5 stars see up to 270% higher conversion rates compared to those below 3.5 stars.

How Does the Review Calculator Work?

Our review score calculator uses a proven mathematical formula to determine exactly how many 5-star reviews you need to reach your target rating:

1 Input Current Stats

Enter your current rating and total reviews

Choose the rating you want to achieve

3 Instant Calculation

Get exactly how many 5★ reviews are needed

Estimated cost based on platform pricing

The formula accounts for the weighted average of your existing reviews, ensuring accurate calculations for Trustpilot, G2, Google, Yelp, TripAdvisor, and Google Play.

Once you know the total reviews needed, convert that target into daily and weekly pacing with the review velocity planner .

Tips for Improving Your Rating

📈 Drip-Feed Strategy

Add reviews gradually over 7–14 days to appear natural and avoid platform flags

✨ Quality Over Quantity

Focus on authentic, detailed reviews rather than generic 5-star ratings

💬 Respond to Reviews

Engage with both positive and negative reviews to show you value feedback

📊 Monitor Your Score

Use our calculator regularly to track progress and plan next steps

🌐 Diversify Platforms

Build trust across Trustpilot, G2, and Google for maximum impact

The sweet spot — excellent rating without appearing artificially perfect

Frequently Asked Questions

Common questions about the TrustScore Calculator. Use the Review Velocity Planner to build an execution timeline once you know your review target.

How does the TrustScore Calculator work? + The TrustScore Calculator uses a mathematical formula to determine how many 5-star reviews you need to reach your target rating. It factors in your current rating, total number of reviews, and desired target rating to calculate the exact number of reviews required.

Is the TrustScore Calculator accurate for all platforms? + Yes, our calculator works for Trustpilot, G2, Google, Yelp, TripAdvisor, and Google Play. Each platform uses a 5-star rating system, and our formula accurately calculates the reviews needed. We even account for Trustpilot's unique Bayesian averaging system.

How many reviews do I need to reach a 4.5-star rating? + The number of reviews needed depends on your current rating and total review count. Use our TrustScore Calculator to input your specific numbers and get an instant, accurate calculation of reviews needed to reach 4.5 stars or any target rating.

What is the ideal star rating to target? + Research shows that 4.5–4.6 stars is the sweet spot. Ratings above 4.7 can actually appear suspicious to consumers. A 4.5–4.6 rating signals 'Excellent' on most platforms, maximizes conversion rates, and is significantly more cost-effective to reach than 4.8 or 4.9.

How does Google round star ratings? + Google rounds displayed ratings to the nearest tenth. For example, a true average of 4.95 would display as 5.0, while 4.94 would show as 4.9. This rounding can work in your favor — you might need slightly fewer reviews than the mathematical formula suggests to visually reach your target.

What is the cost per review for different platforms? + Pricing varies by platform and package size. Trustpilot reviews start at $20 per review, G2 reviews at $29–30, Google reviews at $18–20, and Google Play reviews at $6–8. Larger packages offer better per-review pricing.

View all pricing packages →

OrderBoosts helps brands improve review credibility across major platforms with pacing, planning, and delivery built for long-term trust.

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