Rating 50% Volume 50%
A handful of excellent reviews counts — but cannot carry the score. With thin data, the star average leads.
Volume signal saturates at 100 reviews.
Our Method · Nothing Hidden
How We Score Every Product
Every product on PickSmartly earns a PM Score from 0–10. Most sites keep that number in a black box — here is the exact formula, every weight, and every tier that produces it.
- Score Scale
- 0–10
- Signals Blended
- 2
- Volume Tiers
- 3
- Paid Placements
- None
The Formula
Two public Amazon signals go in; one number comes out. The customer rating measures quality; the review count measures consensus — how many people are standing behind that rating.
PM Score = wQ × Quality + wC × Consensus
The weights are not fixed: they shift with review volume, in three tiers. The fewer reviews exist, the more the star average has to say; once tens of thousands have weighed in, the crowd is the evidence.
The Three Phases
Each product is scored in exactly one phase, decided by its review count.
Rating 30% Volume 70%
The crowd has spoken. Consensus now dominates, and a lone wave of early hype can no longer prop a product up.
Volume signal saturates at 1,000 reviews.
Rating 10% Volume 90%
At this scale the volume signal saturates at maximum. A 4.2★ across 25,000 reviews is what the world actually receives.
Volume signal saturates at 1,000 reviews.
Worked Examples
One product, one rating — three phases. The same 4.5☆ earns a higher score as consensus grows, while the star average itself matters less and less. Every value below is computed live by the same formula the rankings use.
Product
Rating → Quality
Reviews → Consensus
Weights
PM Score
Quality Phase
4.5★
80 reviews
9.0/10
8.0/10
50/50
8.50
Balanced Phase
4.5★
3,000 reviews
9.0/10
10.0/10
30/70
9.70
Consensus Phase
4.5★
25,000 reviews
9.0/10
10.0/10
10/90
9.90
Why 8.5 → 9.7 → 9.9 for the same stars? Quality contributes 4.5, then 2.7, then 0.9 — as consensus firms up, the crowd’s verdict takes over the score.
This Product’s Score
Full arithmetic for AC Adapter Compatible with Toshiba CL15-B1300 L15W-B1302 L15W-B1310 L15W-B1320 P50-AST3NX1 P50W-BST2N01 P50W-BST2N23 P55 P55-A5200 P55-A5312 P55t P55t-A5116 P55t-A5118 P55t-A5202 P55W-B5112 P55W-B5220 P55W-B5224 P55W-B5318 P840 P840-ST2N01 P840T P840T-ST3N01 P840T-ST4N01 P840T-ST4N02 P845 P845-S4200 P845T-S4305 P845T-S4310 S45-A4235 S50-AST3NX1 S50-BST2GX1 S50-BST2NX1 S50-BST2NX4 S55-A5352 S55-B5280 S55t-B5232 S55t-B5239 S55t-B5282 S955 S955D S955D-S5150 S955D-S5374 S955-S5166 S955-S5373, recomputed live from current data.
1.3
PM Score
Quality Phase · Under 1,000 reviews
iTEKIRO · ASIN B00THXFSZ8
Quality — customer rating
0.0★ → 0.0/10
Consensus — review volume
26 reviews → 2.6/10
0.0 × 0.5 + 2.6 × 0.5 = 1.30
What We Never Score
Price never enters it
A $19 kettle and a $190 kettle face the identical rubric. Price is a purchase decision, not a quality signal — and Amazon prices move too fast to score against.
Only public signals
Both inputs — star rating and review count — come from Amazon’s own public data. Nothing proprietary, nothing self-reported by brands.
One formula for all
The same equation scores every product on the site, with no per-brand overrides, no manual boosts, and no exceptions — including the ones on this page.