Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Calculate the ratio of internal links to total links on a page.
This tool calculates what percentage of a page's total links are internal (pointing to your own site) versus external, given the counts of each -- a quick health check for internal linking, which is a well-established on-page SEO practice for distributing link equity and helping search engines discover your content.
Enter your internal link count and external link count. The internal link ratio appears instantly.
The tool adds your internal link count and your external link count to get a total, then divides the internal count by that total and multiplies by 100. The result is shown with one decimal place, along with the total number of links it was measured against. If both fields are zero there is nothing to divide, so the tool asks you to enter at least one link instead of showing a percentage.
Internal link ratio % = internal links ÷ (internal links + external links) × 100
The tool does not crawl your page. You count the links yourself (or take the counts from a crawler or your CMS) and type the two numbers in. That means the result is only as accurate as the counts you provide.
Suppose a hypothetical guide on your site has 14 links that point to other pages on your own domain and 6 links that point to outside websites. The total is 20, and 14 divided by 20 is 0.70, so the ratio is 70.0 percent. If you later add four more external citations without touching your internal links, the total becomes 24 and the ratio drops to 58.3 percent. Nothing is wrong with either number on its own. The value of the tool is that it lets you see how a page's linking mix shifts as you edit it.
A high ratio means most of the links on the page lead to your own content. That can suit a hub page or a category page whose job is to route readers deeper into your site. A lower ratio means the page cites or references more outside sources, which is natural for research-heavy or review-style articles. Neither is inherently better. What matters is whether the linking serves the reader: does each internal link help them find a genuinely related page, and does each external link point to a source they would want to check?
Very low ratios on pages you want to support other content are worth a look, because a page with plenty of external links and none to your own related articles misses a chance to guide readers onward. On the other side, a page with a very high ratio made up entirely of repetitive navigation links may not be adding editorial value.
A practical workflow is to run the numbers before and after an editing pass. Record the counts for an important page, add internal links where a topic is naturally mentioned, and recheck the ratio. It is also handy when comparing several similar pages, such as your product guides, to spot the ones that link out much more or much less than their siblings. Use that comparison as a reason to review the page's content, not as a pass or fail grade.
There's no single official target -- it depends heavily on content type and site structure. This tool reports the ratio as useful information for your own judgment, not as a pass/fail SEO score.
The tool simply divides whatever counts you enter. Whether to include nofollow links is your choice, so decide on a convention and apply it to every page you compare.
Not by itself. It only means the page has no external links. For a hub or category page that can be normal, but for an article that makes factual claims you may want to cite outside sources where appropriate.
Both fields must add up to at least one link. With zero internal and zero external links there is no total to divide by, so the tool shows a prompt instead.
Yes, run each page's counts separately and compare the percentages and totals. Keep your counting rules identical for both pages so the comparison is fair.
Reference: Google Search Central