The same 1,200 words of email replies take about 7.8 minutes to speak at 153 words per minute, the English speech rate in the Ruan study.

Checked against its source on October 16, 2026

What it measures: Measures the time to speak an example day of replies totaling 1,200 words at the study's English speech rate. Applies to text already composed.
How it is calculated: 1200 / 153 = 7.8 minutes. This is a transcription rate for text already composed, not a rate for composing from scratch.

Calculated from