A 5 star review calculator tells you how many new 5-star reviews you need to reach a target rating (like 4.7 or 4.9) on Google, Yelp, etc.

✅ Quick 5-Star Review Calculator (Copy/Paste)

Inputs

• Current average rating = A
• Current number of reviews = N
• Target rating = T
• New reviews will be 5 stars

Formula (how many 5-star reviews needed):
[
x = \left\lceil \frac{T\cdot N – A\cdot N}{5 – T} \right\rceil
]
Where x = number of new 5-star reviews needed, and ⌈ ⌉ means “round up.”

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Example

If you have A = 4.3 stars with N = 50 reviews, and you want T = 4.7:

1. Current total stars = 4.3 × 50 = 215
2. Target total after x reviews = 4.7 × (50 + x)

Solve:
[
x = \left\lceil \frac{4.7\cdot50 – 4.3\cdot50}{5 – 4.7} \right\rceil
= \left\lceil \frac{235 – 215}{0.3} \right\rceil
= \left\lceil 66.67 \right\rceil
= 67
]

✅ You need 67 new 5-star reviews to reach 4.7.

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Faster: Tell me your numbers

Reply with:

• Current rating (A)
• Total reviews (N)
• Target rating (T)

…and I’ll calculate exactly how many 5-star reviews you need (and I can also show a mini table for multiple targets like 4.6 / 4.7 / 4.8 / 4.9).

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