Audiobook Calculator

Calculate audiobook listening time, production costs, and duration estimates from word count, pages, or recording hours.

Audiobook Calculator

Calculate audiobook listening time, production costs, and duration estimates from word count, pages, or recording hours.

Calculation mode

Original duration (hours)

Playback speed

Word count

Page count

Narration speed (words/min)

Finished hours

Recording hours (optional)

Editing hours (optional)

Cost per finished hour ($)($)

Enter values above and click Calculate — results will appear here with the formula explained.

New duration = original / speed; Time saved = original - new; Audio hours = words / (wpm*60); Cost = finishedHours * costPerHour

How does this work?

Audiobook listening time is original duration divided by playback speed. Time saved is the difference. For estimates from text, audio duration is word count divided by narration speed (150-160 wpm is standard for audiobooks, faster than 130 wpm conversational but slower than 180 wpm podcast). Page count uses ~300 words per page as average.

Production cost is finished hours times cost per finished hour (PFH). PFH $250-500 covers narration, editing, proofing and mastering for indie production. Recording is typically 2-3× finished length, editing 3-4×, so a 10-hour book needs 25 hours recording and 30 hours editing.

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Quick Answer

Audiobook Calculator: Calculate audiobook listening time, production costs, and duration estimates from word count, pages, or recording hours. Formula: New duration = original / speed. Example: A 10-hour audiobook at 1.

How to Use This Calculator

1Choose calculation mode: listening time & speed, word count, page count, or production cost.
2Enter original duration and speed to see new duration and time saved, or word/page count to estimate audio length.
3For production, enter finished hours and cost per finished hour to see total cost, or detailed recording/editing hours for precise estimate.

Formula Used

New duration = original / speed; Time saved = original - new; Audio hours = words / (wpm*60); Cost = finishedHours * costPerHour

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Worked Example

A 10-hour audiobook at 1.5× speed takes 6 hours 40 minutes, saving 3 hours 20 minutes. A 90,000-word novel at 155 wpm is about 9.68 hours (9:41) of audio. At $400 per finished hour, that 10-hour book costs $4,000 to produce.

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Frequently Asked Questions

QWhat is cost per finished hour (PFH)?

PFH is industry pricing for audiobook production. It bundles narration, editing, proofing and mastering into one price per hour of final audio. $250-300 is budget, $400-500 is professional with experienced narrator.

QHow accurate is word count to audio estimate?

Within 10-15%. Narration speed varies by genre and narrator — fiction is often 150 wpm, non-fiction 160 wpm. Add 5% for character voices or complex text.

QWhat is a good playback speed?

1.0× is normal, 1.25× is barely noticeable, 1.5× saves 33% time and is still comfortable for most, 2.0× is fast but doable for familiar material.

QWhy does recording take 2-3× finished length?

Narrators do retakes, pauses, and pickups. Editing then cleans breaths, mouth clicks, and mistakes, requiring 3-4× finished length in post-production.

How to Use This Calculator

1Choose calculation mode: listening time & speed, word count, page count, or production cost.

2Enter original duration and speed to see new duration and time saved, or word/page count to estimate audio length.

3For production, enter finished hours and cost per finished hour to see total cost, or detailed recording/editing hours for precise estimate.

Formula Used

New duration = original / speed; Time saved = original - new; Audio hours = words / (wpm*60); Cost = finishedHours * costPerHour

Frequently Asked Questions

QWhat is cost per finished hour (PFH)?

QHow accurate is word count to audio estimate?

Within 10-15%. Narration speed varies by genre and narrator — fiction is often 150 wpm, non-fiction 160 wpm. Add 5% for character voices or complex text.

QWhat is a good playback speed?

1.0× is normal, 1.25× is barely noticeable, 1.5× saves 33% time and is still comfortable for most, 2.0× is fast but doable for familiar material.

QWhy does recording take 2-3× finished length?

Narrators do retakes, pauses, and pickups. Editing then cleans breaths, mouth clicks, and mistakes, requiring 3-4× finished length in post-production.