Timing a Speech or Script Accurately Before You Deliver It
Accurately estimating speech delivery time requires using a speaking-specific words-per-minute rate (typically slower than silent reading speed) and, ideally, practicing an actual timed read-aloud of the script, since real delivery includes pauses, emphasis, and pacing variation that a pure word-count calculation alone can't fully capture.
Speech timing has its own specific considerations distinct from written reading time, since delivery pacing behaves differently from silent reading.
Why speaking rate differs from silent reading rate
Speaking aloud is generally slower than silent reading — commonly cited speaking rates for a clear, well-paced delivery fall somewhere around 120-150 words per minute, meaningfully slower than the 200-250 WPM range typical for silent reading, since spoken delivery includes natural pauses, breath, and deliberate pacing that silent reading doesn't.
Why a word-count estimate alone isn't fully sufficient
A script's word count and an assumed speaking rate give a reasonable starting estimate, but actual delivery time depends heavily on pacing choices, pauses for emphasis or audience reaction, and individual speaking style — which is why an actual timed practice run-through of the script gives a more accurate, personally calibrated figure than the word-count calculation alone.
A practical approach combining both
Using a word-count-based estimate for initial script length planning, then doing at least one timed practice read-aloud closer to the actual delivery date, combines a quick planning estimate with a more accurate, personally verified final figure before the actual event.