How many reviews do I need to raise my rating?

It solves the weighted average for the missing number: your current rating × your current review count, plus new reviews at an assumed 4.8★ average, divided by the new total — set equal to your target. Rearranged: current count × (target − current rating) ÷ (4.8 − target), rounded up. No hidden fudge factors; it's the same math Google's average uses.

When every customer gets asked — not just the angry ones who show up uninvited — the average skews strongly positive. We use the same 4.8★ assumption as our review ROI calculator, and it's deliberately conservative: many businesses that ask everyone see higher.

Because the math assumes new reviews average 4.8★ — and a weighted average can approach that number but never pass it. As your target gets closer to 4.8, the reviews needed grows toward infinity. Reaching 4.8+ is absolutely possible (plenty of businesses do), but it requires a near-perfect review average, and we'd rather show you honest math than a slider that promises anything.

Then the calculator says zero — and your battle is review count and recency, not the average. A 4.6 with 40 reviews loses to a 4.5 with 400. Steady volume is what keeps you winning the comparison, which is exactly what an always-on review engine is for.