Leaf & Spine

Free calculator

Audiobook Length & Narration Calculator

Turn a word count into finished audiobook hours, studio time and narration cost at your quoted per-finished-hour (PFH) rate.

—Finished length
—Silent reading
—Production time
—Narration cost

How it works

Audiobook narration averages about 150–160 words per minute, or roughly 9,300 words per finished hour. Recording and editing take several times the finished length.

ACX requires one chapter per file, 192 kbps+ CBR MP3 at 44.1 kHz, RMS −23 to −18 dB, peaks under −3 dB and a noise floor below −60 dB.

Frequently asked questions

How long is an audiobook of 90,000 words?
Around 9.5–10 hours at typical narration speed.

More calculators

Spine & cover Calculate paperback spine width and full-wrap cover dimensions for any trim size, page cou Words → pages Estimate how many printed pages your manuscript will be at any trim size and font size, pl ISBN converter Convert ISBN-10 to ISBN-13 and back, validate check digits and hyphenate any ISBN correctl ISBN barcode Create a print-ready Bookland EAN-13 barcode for your ISBN with an optional 5-digit price Paper size converter Convert paper and page sizes between millimetres, centimetres, inches, points and pixels a GSM ↔ lb Convert paper weight between g/m² and US basis weights — bond, text (book), cover, index a Image DPI Check whether an image is sharp enough to print: maximum print size at 300 dpi, pixels nee Booklet imposition Get the page order for printing a saddle-stitched booklet or zine on a home or office prin

Last posts

  1. Using Ring Staples for Calendars and Manuals Explained
  2. Do Loop Staples Work in Long-Reach Staplers
  3. Best Budget Booklet Staplers for Students and Their Projects
  4. Is a Swingline Long-Reach Stapler Reliable for Office Use
  5. Best Bostitch Staplers for Booklet Making and Binding
  6. Why Laminate Peels Off Toner and Which Films Actually Stick
  7. The Best Anti-Glare Matte Laminating Pouches for Clarity
  8. Are Rotating-Head Staplers Good for Booklets?
  9. Why Staples Fail to Close and When You Need a New Stapler
  10. Best A4 Laminating Pouches for Professional Covers