What is Keyword Difficulty?
Keyword difficulty is a 0-100 score estimating how hard it will be to rank in Google's top 10 for a given query. It blends the authority of the sites already ranking, backlink strength, on-page depth, and SERP-feature crowding into a single number.
How Keyword Difficulty works
- 0-30 is realistic for new or low-authority sites — often winnable with one well-structured page.
- 30-50 needs solid content plus a handful of quality backlinks and internal links from related pages.
- 50-70 is ambitious — usually requires topical depth (a full cluster) and consistent publishing over months.
- 70+ is big-site territory: the top 10 are dominated by high-authority domains and DR60+ backlink profiles.
- Every SEO tool computes KD slightly differently — Ahrefs, Semrush, and LemRank use different weights, so treat the number as a band, not a decimal.
- A high KD does not mean "do not target" — it means "do not target head-on". A longer, more specific version of the phrase is almost always winnable.
Example
"seo software" scores ~90 KD (Adobe, Semrush, Ahrefs all rank), but "seo software for shopify plus stores" drops to ~28 — same intent, one-tenth the competition.
Run it on your own keyword
Run the keyword through the SERP checker to see the exact pages, their authority and referring domains.
See the top 10 you would have to beatFrequently asked questions about Keyword Difficulty
What is a good keyword difficulty score to target?
For a new site (Authority Score < 30), target KD < 30. Established sites (AS 40-60) can comfortably chase KD up to 50. Anything above 70 requires either domain authority you already have or a multi-page topical cluster to compete.
Why do different SEO tools show different keyword difficulty scores?
Every tool weights inputs differently. Ahrefs leans heavily on referring domains, Semrush blends SERP authority + volume, and LemRank uses live top-10 authority + SERP-feature crowding. The relative ranking between keywords is what matters, not the absolute number.
Is keyword difficulty the same as competition?
No — "competition" in most tools refers to paid-ad density (how many advertisers bid on the term), which is a commercial signal. Keyword difficulty is organic-only and estimates how hard the top 10 blue links are to displace.
Related terms
SERP
SERP stands for Search Engine Results Page — the page Google (or Bing, DuckDuckGo, etc.) returns after a query. Modern SERPs mix classic blue links with AI Overviews, featured snippets, People Also Ask boxes, image packs, videos, and shopping carousels.
Search Volume
Search volume is the estimated number of times a keyword is searched per month, usually reported per country. Most tools derive it from clickstream panels + Google Ads Keyword Planner, so the number is a smoothed estimate — treat it as a band, not a precise count.
Keyword Golden Ratio (KGR)
The Keyword Golden Ratio (KGR) is a long-tail keyword formula: divide the number of Google results with the phrase in their title (allintitle) by the monthly search volume. If the ratio is under 0.25 and volume is below 250/month, the keyword is "golden" — usually rankable inside 30 days.
Domain Authority
Domain Authority (DA) is Moz's 0-100 score predicting how well a website will rank in search. Ahrefs uses Domain Rating (DR), Semrush uses Authority Score (AS) — all three estimate the strength of a site's backlink profile relative to the whole web. Higher = stronger authority = easier ranking.