CSS specificity calculator

Compare selectors as three-part scores.

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CSS specificity calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Updated 2026-09-20

CSS specificity calculator explained

Calculate selector specificity with separate ID, class and type columns. The argument of :where() contributes zero; :is(), :not() and :has() use the largest argument score. The of-selector in :nth-child() contributes in addition to the pseudo-class.

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A worked example

#a .b p has specificity [1, 1, 1]. :where(#a) p has [0, 0, 1], even though its argument contains an ID.

Before you use the result

This compares selector syntax, not the winning declaration on a live page. Nested & selectors need their parent context. Unknown functional selector rules are rejected rather than assigned a guessed score.

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ToolOctopus. “CSS specificity calculator.” Updated 2026-09-20. https://tooloctopus.com/css-specificity.

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