Keyword difficulty checker
Difficulty is a guess about the competition on page one. Here the guess is open: slide in the referring domains of the ten ranking pages, see exactly how the score reacts, and weigh the signals a number can't capture.
This is not a live KD lookup. We don't have a backlink index. Enter referring-domain counts from Ahrefs Webmaster Tools, Moz, Semrush or a similar tool, or use the presets to learn how difficulty behaves.
Referring domains of the top 10
Estimated difficulty
41/100
Moderate. Some ranking pages have real link support. Expect to need a strong page plus a handful of relevant links.
3 of 10 ranking pages have 10 or fewer referring domains.
The formula
For each position: log₁₀(referring domains + 1), weighted from 1.5 at #1 down to 0.6 at #10, because the top spots matter most. The weighted average is divided by log₁₀(3,001), so 3,000+ referring domains on every result = 100. The log scale reflects that going from 0 to 10 linking sites matters far more than going from 1,000 to 1,010.
Page-one weak spots
Search the keyword in a private window and tick what you see. These signals often matter more than the score.
No clear signal yet: tick what you see on page one.
How keyword difficulty scores are made
Most commercial difficulty scores come from the same idea: look at the pages ranking in the top 10 and measure how much link authority they have. Ahrefs has said publicly that its KD is based on the number of referring domains pointing at the top-ranking pages; Moz and Semrush blend in their own authority metrics. Each tool has its own scale, so a 40 in one tool is not a 40 in another.
What the number leaves out is often what decides a ranking: whether the ranking pages actually answer the query, how fresh they are, whether Google is testing forum results, and how much your own site already covers the topic. That is why the checklist above sits next to the score.
Using difficulty well
- Compare difficulty only within one tool.
- Judge it against your own site: a site with hundreds of linking domains in a niche can go after “hard” terms a new blog shouldn't.
- Pair it with real search volume and business value. Our prioritiser does the arithmetic.
- When a head term is hard, the long-tail version often shares the intent with far less competition. Try the long tail keyword generator.
Questions people ask
What is keyword difficulty?
An estimate of how hard it would be to reach page one of Google for a keyword. Most SEO tools calculate it from the backlink profiles of the pages already ranking, especially how many different websites (referring domains) link to each of them.
Why doesn't KeywordForge give every keyword a difficulty score?
Because a real score needs backlink data for every page ranking on page one, and we don't have a backlink index. Instead, this checker scores the numbers you bring from a tool that does (Ahrefs Webmaster Tools, Moz, Semrush or similar) using an open formula, and adds the page-one signals you can judge by eye.
Is keyword difficulty the same across tools?
No. Ahrefs, Semrush and Moz each use their own formula and index, so the same keyword can be "easy" in one and "hard" in another. Compare scores within a single tool, never across tools.
What is a good keyword difficulty for a new site?
New sites with few links should look for keywords where several page-one results have few referring domains, or where forums, thin pages or off-topic results rank. That is a better signal than any single number.
Can I rank for a high difficulty keyword?
Yes, with a clearly better page, strong topical coverage and links over time. Difficulty predicts effort, not impossibility. Content quality, intent match and freshness also matter and are not in the number.