Amazon Transcribe
Developer Guide

Transcribing Numbers

When you are transcribing US English, Australian English, British English, or Indian English audio using the StartTranscriptionJob operation, numbers are transcribed as digits instead of words. For streaming transcription, numbers are transcribed as digits for US English and British English only. For example, the spoken number "one thousand two hundred forty two" is transcribed as "1242."

In all other languages numbers are transcribed into their word forms.

Numbers are transcribed according to the following rules:

Rule Description
Convert cardinal numbers greater than 10 to numerals
  • "Fifty five" > 55

  • "a hundred" > 100

  • "One thousand and thirty one" > 1031

  • "One hundred twenty-three million four hundred fifty six thousand seven hundred eight nine" > 123,456,789

Convert cardinal numbers followed by "million" or "billion" to numerals followed by a word when "million" or "billion" is not followed by a number.
  • "one hundred million" > 100 million

  • "one billion" > 1 billion

  • "two point three million" > 2.3 million

Convert ordinal numbers greater than 10 to numbers

  • "Forty third" > 43rd

  • "twenty sixth avenue" > 26th avenue

Convert fractions to their numeric format.

  • "a quarter" > 1/4

  • "three sixteenths" > 3/16

  • "a half" > 1/2

  • "a hundredth" > 1/100

Convert numbers less than 10 to digits if there are more than one in a row.
  • "three four five" > 345

  • "My phone number is four two five five five five one two one two" > 4255551212

Decimals are indicated by "dot" or "point."
  • "three hundred and three dot five" > 303.5

  • "three point twenty three" > 3.23

  • "zero point four" > 0.4

  • "point three" > 0.3

Convert the word "percent" after a number to a percent sign (%).

  • "twenty three percent" > 23%

  • "twenty three point four five percent" > 23.45%

Convert the words "dollar," "US dollar," "Australian dollar, "AUD," or "USD" after a number to a dollar sign ($) before the number.

  • "one dollar and fifteen cents" > $1.15

  • "twenty three USD" > $23

  • "twenty three Australian dollars" > $23

Convert the words "pounds," "British pounds," or "GDB" after a number to pound sign (£) before the number.

  • "twenty three pounds" > £23

  • "I have two thousand pounds" > I have £2,000

  • "five pounds thirty three pence" > £5.33

Convert the words "rupees," "Indian rupees," or "INR" after a number to rupee sign (₹) before the number.

  • "twenty three rupees" > ₹23

  • "fifty rupees thirty paise" > ₹50.30

Convert times to numbers.

  • "seven a m eastern standard time" > 7 a.m. eastern standard time

  • "twelve thirty p m" > 12:30 p.m.

Combine years expressed as two digits into four.

Only valid for the 20th, 21st, and 22nd centuries.

  • "nineteen sixty two" > 1962

  • "the year is twenty twelve" > the year is 2012

  • "twenty nineteen" > 2019

  • "twenty one thirty" > 2130

Convert dates to numbers.
  • "May fifth twenty twelve" > May 5th 2012

  • "May five twenty twelve" > May 5 2012

  • "five May twenty twelve" > 5 May 2012

Separate spans of numbers by the word "to."

  • "twenty three to thirty seven" > 23 to 37