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Keyword difficulty is a score from 0 to 100 that estimates how hard it would be to rank on the first page of Google for a given keyword. A low score means the pages currently ranking are weak or few, so a new page has a real chance. A high score means the top results are strong, established pages with many links, so ranking will take far more authority and time.
The score is calculated mainly from the backlink strength of the pages that already rank for the keyword. If the top ten results all have large, varied backlink profiles, the keyword scores high. If several ranking pages have thin or no backlinks, it scores low. It is an estimate, not a guarantee, but it is one of the fastest ways to filter a keyword list down to the terms worth your effort.
As a rule of thumb, scores under 15 are very easy and often rankable with a single strong page. Scores from 15 to 30 are easy for most sites with a little authority. The 30 to 50 range is medium and usually needs solid content plus some links. Anything from 50 up is hard, and 70 and above is reserved for keywords where you need real domain authority and a sustained campaign.
Difficulty is only half the decision. A keyword can be easy yet pointless if nobody searches it, and hard yet worth it if the intent is commercial. Pair this checker with the search volume checker so you weigh effort against reward. The sweet spot for a growing site is low difficulty combined with clear buyer or research intent.
Build a keyword list first, then run each term through this checker to sort them. Target the low difficulty terms early to win quick rankings and build topical momentum, and queue the harder terms for later once your site has earned more authority. Group related easy keywords into a cluster and cover them with thorough, genuinely useful pages rather than one thin page per term.
Remember that difficulty reflects today's competition, not your page quality. A genuinely better page that answers the query more completely, loads fast, and earns links can still beat a higher-scored keyword. Use the number to prioritise, not to give up. If a keyword matters to your business and the difficulty is high, treat it as a longer project rather than a no.
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