How Many Words Is an Hour of Audio?
About 7,000 to 10,000 English words for an hour of speech, and fewer in Arabic. Sourced speaking rates and the word counts in our own test clips.
The Scriptorium team ·
An hour of English speech is roughly 7,000 to 10,000 words, depending on how fast people talk. At the 150 words per minute that VirtualSpeech's page on speaking rate gives for conversation, an hour is 9,000 words. In our own test clips, read English ran at 171 words per minute (about 10,280 an hour) and read Arabic at 97 (about 5,840 an hour). Arabic gets fewer "words" per minute because it attaches many small words to the next one when it is written.
Speaking rates and what they give per hour
| Source | Words per minute | Words in an hour |
|---|---|---|
| Conversation, US English (VirtualSpeech, citing the National Center for Voice and Speech) | about 150 | about 9,000 |
| Conversational, listed without attribution (VirtualSpeech) | 120 to 150 | 7,200 to 9,000 |
| Presentations, comfortable pace (VirtualSpeech) | 100 to 150 | 6,000 to 9,000 |
| Audiobooks, radio and podcasts (VirtualSpeech) | 150 to 160 | 9,000 to 9,600 |
| Our six English test clips (audiobook speech, 1,391 words in 487 seconds) | 171 | about 10,280 |
| Our three Arabic test clips (read sentences, 399 words in 246 seconds) | 97 | about 5,840 |
The first four rows are VirtualSpeech's own statements, only one of them attributed to a research source, so read them as typical ranges. The last two are our measurements: counts of words in the human reference transcripts, divided by the seconds of audio. They come from read speech, and conversation, interviews and phone calls will differ.
Why does Arabic give fewer words?
In written Arabic, the conjunction "and", many prepositions and the definite article are attached to the word that follows. A phrase that English writes as four words, "and with the book", is one written Arabic word. So the same amount of speech makes fewer whitespace-separated words. This is a property of the script, not a slower pace of speech, and it means Arabic word counts and English word counts should not be compared as if they measured the same thing.
A quick planner
| Recording length | Words at 150 per minute | English at our 171 | Arabic at our 97 |
|---|---|---|---|
| 15 minutes (the free preview limit) | 2,250 | 2,569 | 1,460 |
| 30 minutes | 4,500 | 5,138 | 2,921 |
| 60 minutes | 9,000 | 10,276 | 5,841 |
| 90 minutes | 13,500 | 15,414 | 8,762 |
These are multiplications of the rates above, so they carry all the uncertainty of the rates.
Where does the number matter?
- Anything priced per word. Translation and editing are often quoted per word, so the transcript's word count sets the bill. Count it rather than estimating from the length.
- Subtitle and reading length. A transcript of an hour runs to thousands of words; our word counter and the formats guide help you split it.
- Word error rate. It is divided by the number of reference words, which is why Arabic and English scores are not directly comparable (how it is calculated).
Count your own transcript
Paste the text into our transcript word counter, which runs in your browser, or in Python:
print(len(open("transcript.txt", encoding="utf-8").read().split()))That counts runs of characters separated by spaces, the same way our word-error-rate script splits words. A word processor may count slightly differently around hyphens and numbers.
How we counted
We took the reference word counts and clip durations from our measurements page (clips of read speech, measured 2026-10-24) and divided. Nine clips are too few to describe a language; they show why the two languages differ, not an average for either.
Checked on 2026-10-26. VirtualSpeech's page on average speaking rate (the 150 words per minute figure and its attribution, and the other ranges). The rows for our own clips are arithmetic on our published data file. The Arabic attached-word example is a standard feature of the written language, not a measurement. Menus, prices and limits change; confirm on the vendor's page before you rely on them.