An author recording her audiobook, the manuscript page on the wall screen
Home › Guides › Audiobook finished-hour maths
Guide

The finished-hour maths for audiobooks

Audiobooks are quoted, scheduled and paid by the finished hour. Once you can convert a word count into finished hours, every other number about the project follows.

Watch: How long does an audiobook take to record? (48 seconds, sound on). Some studio shots in this film are illustrative.
Read the transcript

How long does an audiobook take to record? Start with the word count. At a normal audiobook pace, about 9,000 words make one finished hour. So a 60,000 word book is about 6.5 hours, and a 90,000 word novel is 10. Nobody narrates in real time, though. Allow two studio hours per finished hour for an experienced narrator, and three for an author reading their own book for the first time. After the room comes editing, then proof-listening, where someone reads along and marks every misread word, then pickups, then mastering. Hourly sessions in the treated room, with an engineer, are from 39 pounds plus VAT. Granary Digital. A working studio since 2005.

Start with the word count

Narrated at a normal audiobook pace, about 9,000 words make one finished hour. So:

ManuscriptWordsFinished hours
Novella or short business book30,000about 3.5
Typical non-fiction60,000about 6.5
Typical novel90,00010
Long novel or memoir120,000about 13

Fast, dense text runs slightly under; dialogue-heavy fiction with character voices runs over. Use 9,000 to plan and let the first session correct it.

Bar chart, drawn to scale: 60,000 words, about 6.5 hours; 90,000 words, 10 hours.
9,000 words = 1 finished hour. Drawn to scale from the figures on this page.

Studio hours per finished hour

Nobody narrates in real time. Allow two studio hours per finished hour for an experienced narrator and three for an author reading their own book for the first time, once retakes, water breaks and page turns are counted. A 60,000-word book is therefore around thirteen to twenty hours in the room, best spread over four to six sessions so the voice stays consistent.

What happens after the room

  • Editing: mistakes, mouth noise and long gaps removed, chapters assembled. Roughly one to one and a half hours of editing per finished hour.
  • Proof-listening: someone reads along with the manuscript and marks every misread word. Real time plus a bit, per finished hour, and the step most self-produced audiobooks skip and regret.
  • Pickups: the misreads re-recorded and dropped in, matched for tone and level.
  • Mastering to the platform's specification.

Delivery specifications

Most retail audiobooks go through ACX (Audible) or an aggregator, and they all check the same things: one file per chapter, measured loudness within a set range, peaks under a ceiling, a quiet noise floor, a short silence at the head and tail of each file, and opening and closing credits. Recording in a treated room with a good microphone chain gets the noise floor right at source, which is far cheaper than fixing it afterwards. We deliver to spec, per platform.

What it costs

Whole books are quoted on the word count, which now you can convert yourself. Hourly audio sessions in the treated room with an engineer are from £39+VAT. The audiobook page has the detail and the booking route.

Related guides

Ready when you are

Availability and a firm quote, usually same day. No pressure, no hard sell.

Get a quoteCall the studio

Questions we get asked

How many words are in an hour of audiobook?

About 9,000 words narrated at a normal pace. A 90,000-word novel is roughly ten finished hours.

How long does it take to record an audiobook?

Two to three studio hours per finished hour, so a 60,000-word book is thirteen to twenty hours in the room, plus editing, proof-listening and pickups afterwards.

What are the ACX audio requirements?

One file per chapter, loudness within a set range, peaks under a ceiling, a low noise floor, silence at the head and tail, and credits. We deliver files to the platform's current specification.

10% OFF YOUR FIRST HIRE

From the Barn

What shot here this month, new kit, masterclass dates and availability. Join the list and get 10% off your first studio hire.

You're on the list. Mention it when you book and we'll take 10% off your first hire.

No spam, roughly one email a month, unsubscribe whenever.

Get a quote