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Trustpilot Review Calculator

Find out exactly how many 5-star Trustpilot reviews you need to reach any target rating - 4.5, 4.7, 4.8 or 4.9 - plus how long it will take at your current pace. Instant, accurate, 100% free.

  • Accurate math
  • Works for Trustpilot Works for Yelp & Trustpilot Yelp
  • No email required
Live calculator
Trustpilot Review Math
Your Trustpilot rating today · out of 5★
Total reviews on your profile
5/mo
12550
5★ reviews needed
44
New rating
4.8★
Time at pace
~9 mo

To go from 4.2★ (20 reviews) to 4.8★, collect 44 new 5-star reviews - about 9 months at 5/month.

How it works

Four inputs. One honest answer.

The Trustpilot review calculator uses the same average-rating math that drives the star score shown on your Trustpilot business profile - no guesses, no fluff.

  1. 01
    Enter your current Trustpilot rating

    Look at your Trustpilot business profile - that visible star average (e.g. 4.2★) is your starting point.

  2. 02
    Add your total review count

    Also on your Trustpilot profile, next to the stars. The bigger this number, the more new reviews you need to move the average.

  3. 03
    Pick a realistic target

    4.5★ earns Trustpilot's 'Excellent' badge, 4.7★ is competitive, 4.8★ is top-tier. 5.0★ is only reachable once averages round up from 4.95.

  4. 04
    Set your monthly pace

    How many reviews you actually collect each month. The calculator turns the required 5-star count into a realistic timeline.

The math

The Trustpilot review formula, explained

Trustpilot's public star rating is a straight arithmetic mean of every review's 1–5 star value, rounded to one decimal. To calculate how many new 5-star reviews you need to hit a target, we solve for N (new reviews) in this equation:

(current_rating × current_count + N × 5) ÷ (current_count + N) = target_rating

Rearranged and solved for N:

N = ⌈(target × count − current × count) ÷ (5 − target)⌉

Because Trustpilot rounds to one decimal, this is the minimum 5-star count that lifts your displayed rating to the target. Trustpilot's internal TrustScore adds a Bayesian weighting for recency and review verification, but it moves in lock-step with the plain average - so this is the honest number to plan against.

Worked example
4.2★ (20 reviews) → 4.8★
  • •Numerator: 4.8 × 20 − 4.2 × 20 = 96 − 84 = 12
  • •Denominator: 5 − 4.8 = 0.2
  • •Result: N = 12 ÷ 0.2 = 60 new 5-star reviews
  • •Verify: (4.2 × 20 + 60 × 5) ÷ 80 = 384 ÷ 80 = 4.80★ ✓
At 5 new reviews/month, that's about a 12-month climb. Most brands accelerate this with Trustpilot's automated invitation flow - the compliant, verified-buyer kind.
Who it's for

Every brand where a TrustScore drives revenue

E-commerce & DTC brands

Trustpilot is the default trust badge at checkout. A 4.7★ store converts up to 2× better than a 3.9★ competitor - the calculator shows exactly how many 5-star reviews it takes to close that gap.

SaaS & fintech

B2B buyers treat Trustpilot as a due-diligence signal. Reaching 4.5★+ unlocks the 'Excellent' TrustScore badge, which is what enterprise procurement teams filter for.

Google Ads Seller Ratings

Trustpilot is a certified Google review partner. You need 100+ reviews at 3.5★ or higher for star extensions to appear in your ads. The calculator times your qualification threshold precisely.

Multi-brand groups

Model each brand or domain independently. A single low-rated product line can drag your parent TrustScore down - the calculator quantifies exactly what recovery looks like per site.

FAQ

Trustpilot Review Calculator - questions people ask

How is the Trustpilot star rating calculated?+
Trustpilot displays your business rating as the average of every review's 1–5 star value, rounded to one decimal. Behind that, the TrustScore is a Bayesian-weighted average that gives more weight to recent reviews and less weight to very old ones, but the number people see on your profile still moves in line with a plain average - which is what this calculator estimates.
How many 5-star Trustpilot reviews do I need to reach 4.8?+
It depends on your current TrustScore and total review count. To go from 4.2 with 20 reviews to 4.8, you need roughly 60 new 5-star reviews. Use the calculator above with your exact numbers - the formula is (target × current_count − current_rating × current_count) ÷ (5 − target).
Can I reach 5.0 stars on Trustpilot?+
Only if every review you have is 5-star. Because Trustpilot rounds the visible rating to one decimal, an average of 4.95 or higher displays as 5.0. Most established brands settle at 4.7–4.9 because a small share of customers always leave 4-star or lower - the calculator shows the exact 5-star volume required for your target.
How long will it take to raise my Trustpilot TrustScore?+
It depends on your monthly review velocity. Most brands collect 5–30 Trustpilot reviews per month with an automated invitation flow. Divide the required 5-star review count by your monthly pace for a realistic timeline - the calculator does this automatically.
Does Trustpilot weight recent reviews more than old ones?+
Yes. The TrustScore algorithm gives more weight to reviews from the last 12 months, and verified (invited) reviews carry more weight than organic ones. The visible star rating still tracks the arithmetic average, which is what the calculator models.
Is this Trustpilot review calculator free?+
Yes. The Trustpilot Review Calculator is 100% free, requires no signup, and stores no data. It runs entirely in your browser.
Can this calculator work for Google, Yelp or Tripadvisor?+
The math is identical for any 5-star rating platform. Use the same inputs for Google, Yelp, Tripadvisor, Facebook, Amazon or any other 1–5 star system - the required 5-star review count will be accurate.

Need to actually get to that rating?

BGR Review delivers verified 5-star Trustpilot reviews from aged, country-matched accounts with order-history simulation - drip-fed to survive Trustpilot's compliance filters, with a 30-day replacement guarantee.

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