keyword

3.9 x 4

Monthly search volume and cost-per-click data for "3.9 x 4" in US.

$ curl "https://api.seodata.dev/v1/keyword?q=3.9+x+4&country=us" +--------------+------------------+ | volume | 90 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-22 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
2.5in to mm	18,100	$0.02	4/20
2.5inch to mm	18,100	$0	4/20
3/2 x 2/3	12,100	$3.78	4/20
2.75 inch to mm	5,400	$0	4/20
3/2 x 4/1	2,900	$1.25	4/20
1.8 x 2	260	$0	6/20
2.8 x 3	260	$0	5/20
3.9 x 5	90	$0	7/20
3.9 x 2	90	$0	5/20
3.9 x 7	40	$0	5/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://api.seodata.dev/v1/keyword?q=3.9+x+4&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt