
A meta description should run about 150 to 160 characters on desktop, which is roughly 920 pixels of width, and around 110 to 120 characters on mobile, about 680 pixels, before Google cuts it off with an ellipsis, according to Google Search Central, Moz, and Ahrefs. Google does not enforce a hard character limit; it truncates by rendered pixel width, so front-loading the point in the first 120 characters keeps your message intact on every device and screen size.
The safe target is 150 to 160 characters on desktop and 110 to 120 characters on mobile. Those figures line up with the pixel widths Google actually renders: about 920 pixels wide on a desktop results page and about 680 pixels on a mobile results page, per the pixel-width guidance that Moz and Ahrefs both publish. Google Search Central itself does not publish a character number; its documentation says descriptions are truncated "as needed" to fit the device, which is exactly why pixel width, not character count, is the real constraint.
Two descriptions with the same character count can behave differently. A sentence full of narrow letters like "i," "l," and "t" fits more characters into the same pixel space than one loaded with wide capitals like "W" and "M." That is why a 160-character description written in narrow letters might display in full, while a 150-character one full of capitals gets clipped early.
Different SEO tools measure the same limit slightly differently, so it helps to see the guidance side by side. The table below combines the pixel-based figures from Moz and Ahrefs, the character-based checker Yoast ships inside its plugin, and Semrush's own study of what actually shows up in live search results.
| Guideline | Recommended length | Pixel width | Source |
|---|---|---|---|
| Desktop target | 150-160 characters | ~920px | Moz / Ahrefs pixel guidance |
| Mobile target | 110-120 characters | ~680px | Moz / Ahrefs pixel guidance |
| "Green light" checker range | 120-156 characters | Character-based, no pixel figure | Yoast SEO |
| Average snippet Google actually shows | ~146 characters desktop, ~136 mobile | Varies with rendered font | Semrush SERP study |
Read the table as a range, not a rule. If your description sits inside 120 to 156 characters and puts the key benefit before the halfway point, it will survive on nearly every device Google renders it on.
Google renders search results as an image on screen, so what actually gets cut off is a row of pixels, not a row of characters. A character count is only a proxy that works most of the time because average letter width is fairly predictable across normal sentences. Google Search Central confirms the underlying rule directly: there is no set character limit, and the snippet is "truncated in Google Search results as needed, typically to fit the device width."
Go over the pixel width and Google truncates the description at the last full word that fits, then adds an ellipsis. If your call to action or key number sits after that cutoff point, the reader never sees it, even though the full sentence still exists in your page's HTML. Go too short (under roughly 50 characters) and you leave visible empty space in the snippet, which often signals to Google that your description is not the most useful text available, making it more likely to swap in text pulled from the page body instead.
Neither mistake triggers a penalty. Google has said plainly that meta description length is not a ranking factor. The cost is entirely in the search results page itself: a clipped or thin snippet reads worse than a complete one and tends to earn a lower click-through rate for the same ranking position.
No. Google's own guidance treats the meta description as a tool for writing a better snippet, not a ranking input, and the company has repeated this position for years. What length does influence is click-through rate: a description that fits cleanly and leads with the answer earns more clicks at the same position than one that gets cut mid-thought or reads as generic filler.
It is also worth remembering that writing a perfect-length description does not guarantee Google will use it. In its analysis of live search results, Ahrefs found Google displays the exact meta description a page supplies only about 37% of the time. The rest of the time, it generates a snippet from the page's own text, usually because that text answers the specific query more directly than the static description does. Writing a strong, on-topic page still matters more than hitting an exact character count.
A plain character counter cannot tell you where the line actually breaks, because it does not account for letter width or the font Google renders. Our free meta description length checker measures both the character count and the approximate pixel width so you can see whether a specific description survives on desktop and mobile before you publish it. Pair it with our SERP snippet preview tool, which renders your title and description exactly as they would appear in a live results page, so you catch an awkward cutoff before a searcher ever does.
If you manage a large site, spot-check your highest-traffic pages first, since those are where a clipped snippet costs you the most clicks. Google Search Console's Performance report can also flag pages with an unusually low click-through rate relative to their ranking position, which is often a sign the snippet is not doing its job.
How long should a meta description be? Aim for about 150 to 160 characters on desktop, which is roughly 920 pixels wide, and around 110 to 120 characters on mobile, about 680 pixels. Google truncates anything past that width and adds an ellipsis, so front-loading the key point protects you on every device.
What is the character limit for a meta description? There is no strict character limit. Google Search Central states there is no limit on length, but the display is truncated by pixel width, not character count, so two descriptions of the same character length can cut off at different points.
Does meta description length affect SEO rankings? No. Google has said meta description length is not a ranking factor. What it affects is the snippet you control in search results and, indirectly, click-through rate, since a truncated or awkward snippet reads worse than a complete one.
What happens if my meta description is too long? Google cuts it off at the pixel width it renders for that device and adds an ellipsis after the last full word. If the cut lands mid-sentence or before your call to action, you lose the persuasive part of the snippet even though the full text still exists in your HTML.
What happens if my meta description is too short? A very short description, under roughly 50 characters, leaves empty space in the snippet and may prompt Google to append its own text pulled from the page instead. It is not penalized, but it wastes an opportunity to sell the click.
Should I optimize for the mobile or desktop pixel limit? Write for mobile first. Ahrefs and Moz both size mobile snippets around 680 pixels, tighter than desktop's 920, and most search traffic now happens on phones, so anything that gets cut on mobile is also lost to the majority of searchers.
Does Google always show the meta description I write? Not always. Ahrefs' analysis of live search results found Google uses the exact meta description a site provides only about 37% of the time, rewriting or pulling a different snippet from the page content the rest of the time.
Should every page have a unique meta description? Yes. Duplicate or missing meta descriptions give Google no reason to trust your written snippet over auto-generated text, and Google Search Central specifically recommends a unique description for every indexable page.
How do I check the pixel width of a meta description before publishing? Use a SERP snippet preview tool, which renders your title and description at the actual pixel widths Google uses, or a pixel-based meta description length checker. Both flag truncation before the page goes live instead of after you notice lost clicks.
Do these length rules apply to AI Overviews and AI search results? AI Overviews and chat-based search summarize your page in their own words rather than displaying your meta description, so pixel limits do not apply there. A tight, accurate meta description still helps by giving Google a clear signal of the page's topic, which supports both traditional snippets and AI summaries.
Pull up your ten highest-traffic pages, run each meta description through a pixel-width checker, and rewrite anything that clips before the value proposition lands. Getting the length right is a small fix with a fast payoff: better snippets, better click-through rate, no code deploy required. If you want a full audit of every title tag and meta description on your site, along with the rest of your on-page SEO, our team can walk you through what to fix first, starting with the pages closest to page one. For the broader on-page picture beyond just the description, see our guides on what metadata means in SEO, how to write an SEO-friendly slug, and how on-page SEO differs from off-page SEO. If you want the full process for making a page compete for its keyword beyond the metadata layer, our content optimization guide covers intent, structure, and AI-search formatting in depth. And if you are trying to win the featured snippet or AI Overview for a query rather than just the standard blue link, our guide on how to rank in SERP features covers the formatting that gets you there.
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