How to Pronounce English Numbers, Dates, and Math Expressions

Numbers are everywhere in English: prices, phone numbers, dates, addresses, and math class. But pronouncing them correctly can be surprisingly tricky. The difference between "thirteen" and "thirty" has caused real confusion in business meetings, and ordinal numbers like "fifth" and "twelfth" contain some of the hardest consonant clusters in English.

This guide covers everything you need to say numbers, dates, and math expressions clearly and confidently in American English.

Thirteen vs. Thirty: The Teen/Ty Stress Trap

One of the most common number pronunciation mistakes is confusing the "-teen" numbers (13-19) with the "-ty" numbers (30-90). The key difference is stress.

Rule: "-teen" numbers have stress on the SECOND syllable. "-ty" numbers have stress on the FIRST syllable.

Tip: The "-teen" ending uses a long /iː/ sound and gets more emphasis. The "-ty" ending uses a short, unstressed /i/ sound. Try exaggerating the difference when you practice.

Extra tip: When counting or giving a number in context, you can add the next word to help clarify. For example, "thirteen dollars" (stress on TEEN) vs. "thirty dollars" (stress on THIR). Listeners use context to confirm what they heard.

Ordinal Numbers: Tricky Consonant Clusters

Ordinal numbers (first, second, third...) are used for dates, rankings, floors, and more. Several of them contain difficult consonant clusters that require careful practice.

The Hardest Ordinals

Pronunciation tip: For "fifth," make the /f/ sound, then quickly move your tongue to the /θ/ (th) position. For "twelfth," it helps to slightly reduce the /l/ sound in fast speech. Many native speakers actually say something close to /twɛlθ/ in casual conversation.

How to Say Dates in American English

Americans say dates differently than speakers of British English, and the format can confuse learners.

American Date Format

Written: March 3, 2026 (Month + Day + Year)

Spoken: "March third, twenty twenty-six"

Key rules for saying dates:

• Say the month name first (never the number of the month)
• Say the day as an ordinal number: "third" not "three"
• For years after 2000: "twenty twenty-six" or "two thousand twenty-six" (both are correct)

Year Pronunciation Guide

• 1999 = "nineteen ninety-nine" (split into two pairs)
• 2000 = "two thousand" (or "the year two thousand")
• 2005 = "two thousand five" (or "twenty oh five")
• 2010 = "twenty ten" (or "two thousand ten")
• 2026 = "twenty twenty-six"

Decades

• The 1990s = "the nineteen nineties" or "the nineties"
• The 2000s = "the two thousands" (sometimes "the aughts")
• The 2020s = "the twenty twenties" or "the twenties"

Fractions

Fractions have their own pronunciation rules in English. The numerator (top) uses a cardinal number, and the denominator (bottom) uses an ordinal number.

• 1/2 = "one half" (special case, never "one second")
• 1/3 = "one third"
• 1/4 = "one quarter" or "one fourth"
• 3/4 = "three quarters" or "three fourths"
• 2/3 = "two thirds"
• 1/5 = "one fifth"
• 7/8 = "seven eighths"

Note: When the numerator is greater than 1, the denominator becomes plural: "two thirds," "three quarters."

Decimals and Percentages

Decimals

In American English, the decimal point is read as "point," and each digit after the point is read individually:

• 3.14 = "three point one four" (not "three point fourteen")
• 0.5 = "zero point five" or "point five"
• 2.75 = "two point seven five"
• 0.001 = "zero point zero zero one"

Percentages

• 50% = "fifty percent"
• 99.9% = "ninety-nine point nine percent"
• 0.5% = "zero point five percent" or "point five percent"
• 100% = "one hundred percent" (often used figuratively: "I'm one hundred percent sure")

Math Symbols and Expressions

Knowing how to read math expressions aloud is essential for school, work, and everyday life.

Phone Numbers, Addresses, and Prices

Phone Numbers

American phone numbers follow a specific pattern. Each digit is said individually, and "oh" /oʊ/ is often used for zero:

• (212) 555-0198 = "two one two, five five five, oh one nine eight"
• When two digits are the same in a row, you can say "double": "five five" or "double five"
• The area code (first three digits) is usually grouped: "two twelve" or "two one two"

Addresses

• 350 Fifth Avenue = "three fifty Fifth Avenue" (not "three hundred fifty")
• 1600 Pennsylvania Ave = "sixteen hundred Pennsylvania Avenue"
• 42nd Street = "forty-second Street"

Prices

• $9.99 = "nine ninety-nine" or "nine dollars and ninety-nine cents"
• $1,500 = "fifteen hundred dollars" or "one thousand five hundred dollars"
• $2.50 = "two fifty" or "two dollars and fifty cents"

General Tips for Number Pronunciation

• Slow down for critical numbers. In situations where the number really matters (phone numbers, addresses, prices), slow down and enunciate.
• Use context. Say "thirteen dollars" instead of just "thirteen" to avoid confusion with "thirty."
• Practice the /θ/ sound. Many number words contain "th": third, fourth, fifth, sixth, thirteenth, thirtieth. The /θ/ sound requires placing your tongue between your teeth.
• Learn the rhythm. Numbers in English follow natural stress patterns. "Twenty-THREE" is incorrect; "TWEN-ty-three" is correct.
• Listen to native speakers. Pay attention to how Americans say numbers in podcasts, YouTube videos, and news broadcasts.

Practice Makes Perfect

Numbers come up constantly in everyday English. Practice reading prices at the store, saying phone numbers aloud, and reading dates from your calendar. The more you practice, the more natural these patterns will feel.

Ready to practice more pronunciation skills? Try our interactive exercises at the pronunciation practice section.