How to add a reading progress bar in a Blogger theme

A thin bar at the top of the screen that fills as you scroll is a small detail that makes long articles feel manageable. This article teaches you how to add a reading progress bar to a Blogger theme with BlogKub, one whose color and height you can adjust, light and not affecting speed, along with the UX reasoning and the settings.

Updated 14 July 2026   About an 8 minute read   Level: Beginner

What a reading progress bar is

A reading progress bar is a thin bar fixed at the very top of the screen that gradually fills from left to right in proportion to how far the reader has scrolled down the article. When you scroll to the end of the article, the bar fills exactly. It acts like a gauge that says "how far you have read, and how much is left".

This idea comes from reading a paper book, where we can see the thickness of the remaining pages with our eyes. But on a screen we have no such signal. The progress bar fills this gap, giving readers a sense of control and a way to predict when they are about to finish.

Why a progress bar helps people read to the end

Behind this small feature is a powerful psychological principle. People tend to want to finish something they have started (the goal-gradient effect). When we see we have read halfway, we are more motivated to keep reading to the end than when we do not know how much is left. The progress bar turns the feeling of "is there still a long way to go?" into "just a little more and it is done".

For long articles, this feeling matters a lot, because an article with no signal of its length may make readers discouraged and quit midway. Conversely, when readers see they are near the end, they usually keep reading to the conclusion and the end sections, which is where you often place read-on links or various invitations.

How BlogKub's progress bar works

BlogKub's bar is a fixed element at the very top of the screen, with a small script that calculates what percentage of the page height the reader has scrolled down, then adjusts the bar's width to match. All of this uses very few resources, loads no external files, and does not affect site speed.

You can adjust both the bar's height (razor thin or slightly thicker) and its color, which can be the theme's primary, accent, or a gradient that feels premium. The bar also uses colors based on theme variables, so it changes automatically when you switch to dark mode or change the theme color.

How to add the progress bar in BlogKub, step by step

1. Add the Progress Bar block. Many templates already include it. If yours does not, open the left library, the "Article & UX" category, and drag the "Progress Bar" block in.
2. Choose the bar height and color. Click the block to set the height (3 pixels is recommended for a nice thin look) and color (primary, accent, or gradient) to match your site's design.
3. Export the XML and upload. Click Export, then take the file to blogger.com → Theme → three-dot menu → Backup/Restore → select the XML file.
4. Test the scroll reading. Open a live article, scroll down and check the top bar fills according to how far you go. When you reach the end of the article, the bar should fill exactly.

How to choose a height and color that look good

A good progress bar should be "noticeable but not intrusive". Follow these principles when setting it up.

• Keep the height thin. Around 2 to 4 pixels is just right, thin enough not to steal attention from the content, but thick enough to see.
• Use a color that contrasts with the header, so the bar stands out from the background. The theme's primary or accent color usually works well.
• A gradient adds a premium touch. If you want a modern look, a gradient between the primary and accent colors gives a flowing feel as the bar expands.
• Test both dark mode and light, because the bar is based on theme colors, so make sure it is clearly visible in both modes.

The progress bar and other features that pair with it

The progress bar works best used together with other reading aids in long articles, such as a table of contents to jump to a heading, a back to top button for a quick return, and a read time badge that says in advance how many minutes it takes. Together these create a complete and professional reading experience.

In particular, pairing "read time" at the start of the article with the "progress bar" during reading gives readers two layers of information: knowing from the outset how long it will take, and seeing progress throughout, which reduces hesitation and encourages reading to the end.

Another benefit of seeing these features as a "set" is the consistency of experience. When every article on your site has a progress bar, a table of contents, and a back to top button that all work the same, readers learn how to use them once and become familiar on every page. This familiarity reduces reading friction and makes the site feel systematic and trustworthy, which is what readers remember and return for.

The progress bar on mobile vs desktop

Reading behavior on mobile and desktop differs, and the progress bar plays a different role on these two devices. On mobile, the narrow screen makes the same article run longer vertically, so readers scroll more often and longer. The progress bar is therefore even more useful, because it helps the seemingly endless scrolling feel like it has a visible end.

On desktop, the wide screen shows more content at once, but the bar still helps give an overview of where you are in the article. The advantage of a top-line bar is that it works the same on both devices with no separate adjustment, and because it is thin and at the very top edge, it does not take up valuable reading space on a mobile screen, unlike a circular or numeric progress indicator that may clutter a small screen.

Why leading sites favor the progress bar

If you observe many leading article and online media sites, you will see the progress bar has become a standard element of long-form pages. The reason is not just aesthetics, but that it solves a real problem of on-screen reading, namely the lack of a length signal that a paper book has naturally.

Those sites value metrics like time on page and completion rate, because they relate to revenue and reader engagement. The progress bar is one of the small tools that helps push these numbers up without bothering readers. Because BlogKub builds this same-level feature into the theme, your Blogger blog looks and works on the same level as a professional site, without you having to write any code yourself.

Common problems and how to fix them

The bar does not move

This means the page content is too short to scroll, or you have not added the Progress Bar block to the theme. Check that you added the block and test on an article long enough to scroll.

The bar is hard to see

Increase the height slightly or change to a color that contrasts more with the header, so it is clearly visible in both modes.

The bar overlaps a sticky header

The bar sits at the very top above everything, which is the standard position. If it feels like it overlaps a sticky header, reduce the bar height so it looks like a thin, blending line.

Best practices

• Use the progress bar on long articles that require scrolling, where it is most meaningful.
• Set the height thin (2 to 4 pixels) so it does not steal attention from the content.
• Choose a color clearly visible in both dark and light mode.
• Pair it with a table of contents, a back to top button, and read time for a complete reading experience.

Wrapping up

The reading progress bar is a small detail that has more of a feeling effect than you might think. It tells readers where they are and how much is left, which reduces discouragement and encourages reading to the end. With BlogKub you just add the Progress Bar block, choose the height and color you like, and Export it to use, getting a bar that is light, does not affect speed, and adjusts to the theme automatically. Paired with other reading aids, your long articles instantly look professional and become more enjoyable to read.

Frequently asked questions (FAQ)

Part of the BlogKub feature guides, one article per feature covering the settings, the options and the problems people hit.