Learn Spanish Numbers With This Step By Step Guide

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Spanish Numbers From One To A Billion

1 un/uno/una

2 dos

3 tres

4 cuatro

5 cinco

6 seize

7 siete

8 ocho

9 nueve

10 diez

11 once

12 doce

13 trece

14 catorce

15 qulnce

16 dieciséis

17 diecisiete

11 dieciocho

19 diecinueve

20 veinte

21 velntlún/ventiuna/velntiuno

22 veintidós

23 veintitrés

24 veinticuatro

25 veinticinco

26 veintiséis

27 veintisiete

28 veintiocho

29 veintinueve

30 treinta

31 treinta y un/uno/una

32 treinta y dos

33 treinta y tres

34 treinta y cuatro

35 treinta y cinco

36 treinta y seis

37 treinta y siete

38 treinta y ocho

39 treinta y nueve

40 cuarenta

41 cuarenta y un/uno/una

50 cincuenta

60 sesenta

70 setenta

80 ochenta

90 noventa

100 cien/ciento

101 ciento un/üno/una

102 ciento dos

200 doscientos/doscientas

210 doscientos diez/doscientas diez

300 trescientos/trescientas

400 cuatrocientos/cualrocientas

500 quinientos/quinientas

600 seiscientos/seiscientas

700 setecientos/setecientas

800 ochocientos/ochocientas

900 novecientos/novecientas

1.000 mil

1.050 mil cincuenta

1999 mil novecientos noventa y nueve

2.000 dos mil

66.000 sesenta y seis mil

1.000.000 un millón an American billion: mil millones a million millions: un billón

Spanish One

Uno becomes un before a masculine noun, una before a feminine noun:

  • Hay treinta y un libros. There are thirty-one books.
  • Hay treinta y una cartas. There are thirty-one letters.


  • ¿Cuántos libros hay? Treinta y uno. How many books are there? Thirty-one.

Note: 16 through 29 are written as one word.

Spanish Hundreds

Ciento one hundred is used when another number follows:

  • ciento trece 113

But cien is used in all other cases:

  • Hay más de cien. There are more than 100.
  • Cien hombres. 100 men.

However, ciento is used in percentages:

  • el quince por ciento 15%

The hundreds (i.e. 100, 200, 300, 400, 500, 600, 700, 800 and 900) are written as one word and the suffixed form -cientos agrees in number with the thing counted:

  • doscientas mujeres/mesas 200 women/tables (fem.)
  • quinientos quince hombres/dólares 515 men/dollars (masc.)

The irregular forms quinientos/as 500, setecientos/as 700, and novecientos/as 900 should be noted.

Spanish Thousands and Decimals

  • Thousands are separated by periods/full-stops—10.000 = diez mil 10,000
  • decimals are separated by commas: 10,25 = diez coma veinticinco = ten point two five. But Mexico uses the American system - 10,000; 10.25, etc.
  • Mil is not pluralized in numbers - cinco mil 5000. It is, however, pluralized when it is used as a noun:
  • Los miles de personas que creen eso. The thousands of people who believe that. When used in this way mil is a masculine noun.

Spanish Millions and Billions

Millón and billón are nouns, whereas other numbers are adjectives. They therefore require de before the thing counted:

Ha costado un millón/billón de dólares. It cost a million/billion dollars.


Ha costado un millón tres mil dólares. It cost one million three thousand dollars.

Spanish Telephone Numbers

Telephone numbers are said by tens whenever possible, and one begins either by hundreds or by a single digit when there is an odd number of figures:

  • ocho treinta y siete veintidós quince 837 2215 or ochocientos treinta y siete veintidós quince

Cero is used for zero:

  • cero quince cuarenta veintiséis 015 4026

Spanish Ordinal Numbers

Ordinal Numbers higher than ten are rather a mouthful in Spanish and they are usually avoided in all but formal styles. One says el quince aniversario rather than él decimoquinto aniversario the 15th anniversary, or el capítulo veintiséis chapter 26/the 26th chapter. The higher the number, the rarer the ordinal form. For this reason only ordinal numbers up to 20th and a few other common forms are given here.

The forms ending in -avo should strictly speaking be used only for fractions - diez quinceavos ten fifteenths. But they are very commonly used in Latin America to form the higher ordinal numbers, although this is not usually accepted in Spain.

primereo) first
segundo second
tercer(o) third
cuarto fourth
quinto nttn
sexto sixth
séptimo/sétimo seventh
octavo eighth
noveno ninth
décimo tenth
undécimo eleventh onceavo
duodécimo twelfth doceavo
decimotercero thirteenth treceavo
decimocuarto fourteenth catorceavo
decimoquinto fifteenth quinceavo
decimosexto sixteenth dieciseisavo
decimoséptimo seventeenth diecisieteavo
decimoctavo eighteenth dieciochavo
decimonoveno nineteenth diecinueveavo
vigésimo twentieth veinteavo
centésimo hundredth centavo
milésimo thousandth

All these are normal adjectives and agree in number and gender:

  • los treinta primeros hombres the first thirty men
  • la segunda calle a la derecha the second street on the right

Primero and tercero lose their final vowel before a singular masculine noun:

  • el primer/tercer dia the first/third day


  • la primera/tercera semana the first/third week

Approximate Spanish Numbers

Approximate numbers are formed by adding -ena to the cardinal number after removing any final vowel. These numbers exist for 10,15, the tens 20 through 50 and for 100. They are in common use, although docena dozen is not used as much as in English:

  • una decena about ten (note irregular form)
  • una quincena about fifteen
  • una veintena about twenty a score
  • una treintena about thirty
  • una centena about a hundred (note irregular form)

Note special form un millar about a thousand.

Like all collective nouns, these are normally grammatically singular:

  • La primera treintena. The first thirty or so.
  • Ha venido una veintena. About twenty have come.

When de + a plural noun follows, either agreement is possible:

  • Una treintena de estudiantes se quedaron/se quedó en el aula. About thirty students remained in the lecture hall.

Spanish Fractions

The following special words exist:

  • 1/2 una mitad
  • 1/3 un tercio
  • 2/3 dos tercios, etc.

For higher fractions the masculine ordinal number is used, although the feminine form is also found:

  • 1/4 un cuarto
  • 1/5 un quinto
  • 3/7 tres séptimos
  • 7/10 siete décimos
  • tres millonésimos/as three millionths

In non-mathematical language the word parte is added for values over half:

  • la tercera parte a third
  • la quinta parte a fifth

As was mentioned earlier, decimals are expressed with a comma (although Mexico follows our system):

  • 3,75 = tres coma setenta y cinco

The main arithmetical signs are:

  • + más
  • : dividido por or entre
  • - menos
  • x (multiplicado) por
  • 2 al cuadrado
  • % por ciento
  • Dos más ocho son diez 2 + 8= 10
  • Ocho dividido por dos (or ocho entre dos) son cuatro 8:2=4
  • Tres multiplicado por cinco son quince 3x5=15
  • Nueve son tres al cuadrado 9=3Sq2
  • El treinta por ciento 30%

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