Numbers & Contact Details
Esperanto Basic Conversation 1
Chapter 3 · Numbers, Age & Contact Details
🔢 Numbers, Age & Contact Details — Nombroj kaj kontaktaj datumoj
This chapter has three parts. Part 1 teaches the numbers 0 to 10, Part 2 builds everything up to 100 from them, and Part 3 uses the numbers for age, phone numbers and email addresses. Esperanto numbers are among the most regular in the world: there are only twelve words to learn (0 to 10 and 100), and every other number up to 100 is built from them, with no irregular forms.
① A Phone Number — Kio estas via telefonnumero?
② Asking Age — Kiom da jaroj?
③ An Email Address — Kio estas via retpoŝtadreso?
④ Counting Together — Kaj
⑤ Repeat, Please — Ripetu
⑥ Friends' Ages — Kiom da jaroj havas …?
1️⃣ Part 1 — Numbers 0 to 10 — Nombroj de nul ĝis dek
Learn these eleven words and the word cent (100) and you have the building blocks for every number up to 100. Note that c is pronounced ts, so cent is "tsent".
| Number | Esperanto | Stress |
|---|---|---|
| 0 | nul | NUL |
| 1 | unu | U-nu |
| 2 | du | DU |
| 3 | tri | TRI |
| 4 | kvar | KVAR |
| 5 | kvin | KVIN |
| 6 | ses | SES |
| 7 | sep | SEP |
| 8 | ok | OK |
| 9 | naŭ | NAW |
| 10 | dek | DEK |
2️⃣ Part 2 — Numbers 11 to 100 — Nombroj ĝis cent
Teens are simply dek plus the unit: dek unu (11), dek du (12) and so on. Tens are the unit multiplied by dek, written as one word: dudek (2 × 10 = 20). To make a number like 47, say the tens and then the unit: kvardek sep.
| Number | Esperanto | Number | Esperanto |
|---|---|---|---|
| 11 | dek unu | 20 | dudek |
| 12 | dek du | 30 | tridek |
| 13 | dek tri | 40 | kvardek |
| 14 | dek kvar | 50 | kvindek |
| 15 | dek kvin | 60 | sesdek |
| 16 | dek ses | 70 | sepdek |
| 17 | dek sep | 80 | okdek |
| 18 | dek ok | 90 | naŭdek |
| 19 | dek naŭ | 100 | cent |
| Number | Esperanto | How it is built |
|---|---|---|
| 21 | dudek unu | 20 + 1 |
| 35 | tridek kvin | 30 + 5 |
| 47 | kvardek sep | 40 + 7 |
| 58 | kvindek ok | 50 + 8 |
| 69 | sesdek naŭ | 60 + 9 |
| 72 | sepdek du | 70 + 2 |
| 84 | okdek kvar | 80 + 4 |
| 96 | naŭdek ses | 90 + 6 |
3️⃣ Part 3 — Age and Contact Details — Aĝo kaj kontaktoj
Esperanto says "I have X years", like French and Spanish. Because the years are the object of havi, they take the accusative -n: jarojn. You can also use the adjective -jara ("-year-old"): Li estas kvindekjara.
| Situation | Esperanto | English |
|---|---|---|
| Asking age | Kiom da jaroj vi havas? / Kiom aĝa vi estas? | How old are you? |
| Saying age | Mi havas tridek jarojn. | I'm thirty. |
| Adjective form | Li estas kvindekjara. | He is fifty years old. |
| Phone number | Kio estas via telefonnumero? | What is your phone number? |
| Kio estas via retpoŝtadreso? | What is your email address? | |
| Asking to repeat | Ripetu, mi petas. | Please repeat that. |
| Symbol | Esperanto | English |
|---|---|---|
| @ | ĉe (or ĉe-signo) | at |
| . | punkto | dot |
| - | streketo | hyphen |
| _ | substreko | underscore |
🔤 Three Verbs for Numbers and Contact — Verboj
The verb never changes for person, so here are the three tenses of three useful verbs. Remember: -as present, -is past, -os future.
| Tense | havi (to have) | telefoni (to phone) | doni (to give) |
|---|---|---|---|
| present | havas | telefonas | donas |
| past | havis | telefonis | donis |
| future | havos | telefonos | donos |
📖 Vocabulary — Vortaro
20 key words. The Stress column shows the stressed syllable in CAPITALS.
| # | Esperanto | Stress | English | Type |
|---|---|---|---|---|
| 1 | nul | NUL | zero | num |
| 2 | unu | U-nu | one | num |
| 3 | du | DU | two | num |
| 4 | tri | TRI | three | num |
| 5 | kvar | KVAR | four | num |
| 6 | kvin | KVIN | five | num |
| 7 | ses | SES | six | num |
| 8 | sep | SEP | seven | num |
| 9 | ok | OK | eight | num |
| 10 | naŭ | NAW | nine | num |
| 11 | dek | DEK | ten | num |
| 12 | cent | TSENT | hundred | num |
| 13 | jaro | YA-ro | year | noun |
| 14 | havi | HA-vi | to have | verb |
| 15 | kiom | KI-om | how much, how many | adv |
| 16 | numero | nu-ME-ro | number | noun |
| 17 | telefono | te-le-FO-no | telephone | noun |
| 18 | retpoŝto | ret-POSH-to | noun | |
| 19 | adreso | a-DRE-so | address | noun |
| 20 | punkto | PUNK-to | dot, full stop | noun |
✍️ Try It Yourself — Ekzercoj
Say each answer out loud first, then click to check.
1. Say 3, 7 and 10 in Esperanto.
Show answer
tri, sep, dek
2. Say 16, 40 and 99.
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dek ses, kvardek, naŭdek naŭ
3. How do you say "I'm thirty-two"?
Show answer
Mi havas tridek du jarojn.
4. Ask someone their age, then their phone number.
Show answer
Kiom da jaroj vi havas? · Kio estas via telefonnumero?
5. Say the sum "8 + 7 = 15" in Esperanto.
Show answer
Ok kaj sep estas dek kvin.
6. Read out philip@example.org in Esperanto.
Show answer
philip ĉe ekzemplo punkto org. (ekzemplo = example)