Text-to-speech engines often bungle years, prices, fractions, and phone numbers. This tool translates digits into exact, natural spoken words that every voice engine will read reliably.
Instant client-side formatting. Click any example to test:
General / Standard
Enter a value above
Year / Era Reading
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Currency / Financial
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Digit-by-Digit (Phone/Codes)
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Hear the pronunciation
Listen via your browser speech engine before copying into your voiceover script.
Type raw numbers like 1998, $450.75, 3.14, 1/2, or +1-800-555-0199 into the input box.
02
Select pronunciation mode
Choose whether the number represents a year, standard quantity, currency amount, phone digits, or fraction.
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Listen to the browser audio preview
Press play to verify how the speech engine pronounces the converted wording.
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Copy the phonetic text into your script
Paste the spelled-out words directly into FreeTextToSpeech or your voiceover project to guarantee accurate pronunciation.
Rules for writing numbers in text-to-speech scripts
Speech models interpret raw digits inconsistently. By following three baseline rules, you will never get a mispronounced number in your voice tracks:
Rule 1
Spell out years as pairs
Write "nineteen ninety-two" instead of "1992", and "twenty twenty-four" instead of "2024".
Rule 2
Add currency words
Never leave lone $ or € symbols. Replace "$25" with "twenty-five dollars" and "$25.50" with "twenty-five dollars and fifty cents".
Rule 3
Separate phone digits
Add commas or spaces between phone groups so the AI breathes naturally between numbers.
Common examples & quick cheatsheet
Raw Expression
How TTS often reads it
Recommended phonetic fix
1999
"One thousand nine hundred ninety-nine"
"Nineteen ninety-nine"
$350.25
"Dollar sign three fifty point two five"
"Three hundred fifty dollars and twenty-five cents"
2nd
"Two nd"
"Second"
3/4
"Three slash four"
"Three fourths"
1-800-555-0199
"One eight hundred five million..."
"One, eight hundred, five five five, zero one nine nine"
Questions
Frequently Asked Questions
01
Why do text-to-speech engines mispronounce numbers and years?
Most TTS models rely on normalization rules that guess context. When an engine encounters "1995," it often guesses "one thousand nine hundred ninety-five" instead of the year "nineteen ninety-five." Writing numbers out phonetically removes this ambiguity.
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How do you force text-to-speech to say a year correctly?
Write the year as two pairs of words. For example, write "nineteen ninety-five" instead of "1995", and "twenty twenty-four" instead of "2024".
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How should currency symbols like $ and € be formatted for TTS?
Spell out both the main unit and fractional cents. For example, rewrite "$49.99" as "forty-nine dollars and ninety-nine cents" so the voice doesn't say "dollar sign forty-nine point nine nine."
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How do you format phone numbers so TTS reads them digit by digit?
Separate every digit with a space or hyphen, or spell out each digit ("five five five, zero one nine nine"). Grouping digits with commas adds natural conversational pauses.
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What about fractions and percentages?
Write "1/2" as "one half" or "half", "3/4" as "three fourths", and "15%" as "fifteen percent." This prevents engines from reading the slash literally as "one slash two."
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Does this tool work with any text to speech engine?
Yes. Once you convert numbers into plain English words, every text-to-speech engine (including Kokoro, ElevenLabs, Amazon Polly, and browser speech) will read them with complete consistency.
