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Speech Duration, Word Count & Speaking Rate

Estimate speech duration from word count and a selected pace, enter a custom rate, or measure your rate from a timed passage.

Calculator inputs

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Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

A 700-word script at 140 words per minute takes five minutes of continuous speech. Add planned pauses, questions and demonstrations separately.

Minutes = words ÷ words per minute; measured rate = words ÷ measured minutes

Enter these known values and leave the other values blank.

The five preset rates are planning assumptions, not measurements or guarantees of comprehension.
Word count is a nonnegative whole number. Custom pace is positive. Measuring a rate requires positive word count and duration.
The estimate assumes constant pace without extra pauses. Include presentation activities and question time separately.

Choose the custom rate and enter words per minute, or choose measured mode and provide the words and time from a timed passage.

They apply a constant rate to the full word count. Add any separately planned pauses or activities yourself.

Bookify requires whole word counts and positive pace, with positive words and duration for rate measurement.