# How long does a PDF to EPUB conversion take?

Source: https://epubcc.com/answers/how-long-does-pdf-to-epub-take/ (updated 2026-11-04)

Usually seconds once it starts: on our production server, a 585-page text book converted in 3.0 seconds and a 487-page book full of charts in 14.9 seconds (measured on 2026-11-04). The free 5-page sample takes under a second; uploading a large file and waiting in the queue can take longer than the conversion itself.

## What the time depends on

- Images and charts: decoding them is the slow part, which is why the chart-heavy book took five times longer with fewer pages.
- Page count, roughly in proportion once the images are accounted for.
- Your upload: a large PDF is sent in pieces from your browser; the time depends on your connection.
- The queue: conversions run a few at a time, with priority by plan, so at busy moments you may wait for your turn.

## What the page shows while you wait

The conversion page shows real states only: uploaded, pages counted, queued with your position, converting, done. The estimate is a range based on the seconds per page of recent conversions, and before there are enough of those, on a measured starting rule of about 2 seconds per job plus 0.05 seconds per page. There is no invented progress percentage.

If the estimate is over a minute you can ask for an email when it's ready and close the tab.

## Measured, not promised

The two book timings come from the production machine on 2026-11-04, and the benchmark publishes the time each engine took on each document of the corpus. Your own PDF may be faster or slower; the free sample is the quickest way to find out.

**Do I have to keep the page open?** No. Long conversions offer an email when the book is ready, and the conversion page can be reopened later.

**Does a paid plan convert faster?** The conversion itself runs the same way; paid plans get a higher priority in the queue, so they wait less when it is busy.