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CSS Specificity Calculator

Compute CSS selector specificity (a,b,c scores) and settle override battles with math. Prove #id beats .class chains — local calculation, free, no signup.

100% Local Browser Native

How to Use the CSS Specificity Calculator

1. Enter selectors

Competing rules from devtools.

2. Compare scores

(a,b,c) triples decide the winner.

3. Fix properly

Raise specificity or restructure; avoid !important.

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Frequently Asked Questions

How is specificity scored?

IDs, classes/attributes, elements counted as (a,b,c): #nav .item a scores (1,1,1) beating (0,3,0). Higher leftmost number always wins regardless of right side.

Why won't my style apply?

A higher-specificity rule wins silently — compute both selectors here. !important beats everything but creates debt; raise specificity properly instead.

:not() and :is() rules?

:not() adds its argument's specificity; :is() takes its most specific argument; :where() adds zero. Modern selectors follow these exact rules.

Is my CSS uploaded?

No — calculation runs locally in your browser. Code never leaves your device.

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Last updated October 2026