Rule of thumb: a calculator with 18,100 searches at a $7 click is a business; one with 27,100 searches at a $0.10 click is just traffic. We build the first kind.
⚡ Electrical — the beachhead
The whole cluster sells to the same buyer: makers and distributors of conduit, wire, cable tray and switchgear. ~82,800 searches/month at competition 0–3. We build here first.
❄ HVAC & airflow
Opens a second cluster with strong CPCs and rising demand — sold to duct, fan, chiller and compressed-air suppliers.
⚙ Mechanical & power transmission
Home of the single highest CPC in the whole study — bearing life at $18 a click.
🏗 Structural & steel
Sold to steel fabricators and metal-building makers; several with high CPC and near-zero competition.
🛢 Fluids & process
📦 Material handling & rigging
⚠ The traps we skip
High volume, no commercial intent — big numbers that don't sell. We flag these so you don't chase them:
| Keyword | Searches/mo | CPC | Why we pass |
|---|
| Tank volume | 27,100 | $0.10 | ~$3k value — hobbyists, not buyers |
| Steel weight | 27,100 | $0.32 | reference lookup, no purchase |
| Gear ratio | 22,200 | $1.08 | students, thin intent |
| Concrete slab | 60,500 | $3.28 | seasonal; buyer is a contractor, not a manufacturer |
Don't see yours?
These come from a keyword study we refresh monthly. If your product has a calculation buyers run before they buy, tell us — we'll check the volume, the competition and the CPC, and say honestly whether it clears the bar.
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