Free Spanish Numbers to Words Converter
Type a number in digits and see it written out in Spanish words, or type the Spanish words and get the digits back. Each result has the forms you need before a masculine or feminine noun, as money and as an ordinal, and a missing accent gets pointed out. A practice quiz on the same page tests you in both directions, with ranges from 0 to 30 up to 1,000,000 and the years 1900 to 2099. It's free, needs no signup and works on a phone.
Type a number like 1987 to see it in Spanish words, or Spanish words like veintitrés to get the digits.
Practice Spanish numbers
How the Spanish number converter works
There is one box, and it works both ways. Type a number in digits, such as 243 or 1,250,000, and it appears written out in Spanish words. Commas or points as thousands separators are both fine, and so are negatives and decimals, so -7 becomes menos siete. Whole numbers go up to 24 digits, which takes you into the trillones.
Each result sits on its own row with a Copy button. The first row is the counting form, such as veintiuno. If the number changes in front of a noun, two more rows show it before a masculine noun (veintiún libros, un millón de libros) and before a feminine noun (veintiuna páginas, doscientas páginas). For amounts with no more than two decimals, a money row writes the number out in euros, US dollars or Mexican pesos, so 21 euros and 50 cents becomes veintiún euros con cincuenta céntimos. Dollars and pesos use centavos instead. For 1 to 1,000 you also get the ordinal: vigésimo primero, vigésima primera in the feminine, and the abbreviations 21.º and 21.ª. Primero and tercero shorten to primer and tercer before a masculine noun, and the abbreviation for primer is 1.er.
Decimals come with a toggle for the decimal mark. Spain and much of South America say coma, so 3,5 is tres coma cinco. Mexico and much of Central America and the Caribbean say punto, so 3.5 is tres punto cinco.
The converter also works as a Spanish number translator in the other direction. Type doscientos cuarenta y tres and you get 243 back, along with a note on any spelling slip. Veintitres gets a note that it needs an accent: veintitrés. Veinte y uno gets a note that it's usually written veintiuno, and treinta cinco gets a note that it needs a y: treinta y cinco.
How to write numbers in Spanish from 1 to 100
The numbers from 0 to 30 are written as one word, and from 31 on they take three. So it's veintiocho, but treinta y ocho. Four of the one-word numbers carry an accent: dieciséis, veintidós, veintitrés and veintiséis. Leave one off and the converter flags it. You'll sometimes see three-word spellings such as veinte y uno, but the Real Academia Española's 2010 Ortografía prefers the one-word forms, and the converter follows it. From 31 to 99 the tens and units are joined by y: cuarenta y dos, sesenta y siete, noventa y nueve. That y belongs only between tens and units, so 101 is ciento uno. Uno is the form you use when counting. Before a masculine noun it shortens to un, and before a feminine noun it becomes una, so you write veintiún libros but veintiuna páginas. The same shortening happens before mil and millón: 21,000 is veintiún mil and 31,000,000 is treinta y un millones.
Hundreds, thousands and millions in Spanish
Exactly 100 is cien. So is the 100 in front of mil or millones: cien mil, cien millones. Everywhere else it's ciento, as in ciento uno or ciento cincuenta. From 200 up, the hundreds agree with the noun, so it's doscientos libros but doscientas páginas, and quinientas for 500 before a feminine noun. Three of the hundreds are irregular: quinientos (500), setecientos (700) and novecientos (900). With those rules you can write any of the Spanish numbers from 1 to 1,000 in words. Thousands are easier. Mil is never un mil, so 1,000 is mil, 2,000 is dos mil and the year 1984 is mil novecientos ochenta y cuatro. Millón works differently, because it's a noun. It has a plural, millones, and it takes de before a noun when nothing follows it: un millón de euros. Once more digits follow, the de drops out, so 2,500,000 euros is dos millones quinientos mil euros. One case has two correct answers. Before a feminine noun, 21,000 can be veintiún mil or veintiuna mil, and the RAE accepts both. The converter gives veintiún mil.
A Spanish billón is an English trillion
Spanish uses the long scale, so the big number words don't match English, and the gap is a factor of a thousand. An English billion, 1,000,000,000, is mil millones in Spanish. Un billón is a million millions, 10 to the power of 12, which English calls a trillion. Un trillón is 10 to the power of 18. So a Spanish headline about un billón de dólares means a trillion dollars, and an English report of a billion dollars becomes mil millones de dólares in Spanish. The converter writes every number on the long scale, all the way up to the trillones. If you translate figures for work, check this one twice.
Spanish numbers practice
Below the converter is a practice mode that works as a Spanish numbers quiz. Pick a range: 0 to 30, 0 to 100, 100 to 1,000, 1,000 to 1,000,000, or the years 1900 to 2099. Then pick a direction. You either see the digits and type the Spanish words, or read the Spanish words and type the digits. Each answer is marked at once, and a running count of right and wrong stays on screen. Accents count. Type veintitres for 23 and it's marked wrong, with the note “Almost: check the accents.” Capital letters don't count, and un, una and uno are all accepted, so you don't have to guess which noun the quiz had in mind. On-screen buttons type á, é, í, ó and ú, so you don't need a Spanish keyboard. Press Stop to see your score and the numbers you missed, then “Practice my mistakes” goes through just those. There's no audio, so the quiz won't help with pronunciation.
If you're working on verbs as well, the Spanish verb conjugation quiz works the same way, the Spanish verb conjugation worksheets print conjugation exercises for a class, and every form of 600 verbs is in the Spanish verb conjugation tables. For students preparing for the exam itself, NexaProva also has DELE Spanish practice exams.
Number converters in seven other languages
Each of these works both ways, from digits to words and from words back to digits. Each one also has money, ordinals and a practice quiz, and they're all free.
Frequently asked questions
Is this Spanish number converter free?
Yes. There is no account or email address, and it works in the browser on a computer or a phone. Nothing you type is sent to a server, because it all runs in your browser. We count page opens, copies and quiz starts, never what you type.
Can it convert Spanish words back into numbers?
Yes. Type Spanish number words, such as doscientos cuarenta y tres, and you get the digits back. If the spelling is off, it tells you: veintitres needs an accent (veintitrés), veinte y uno is usually written veintiuno, and treinta cinco needs a y (treinta y cinco).
How do I write the numbers 1 to 100 in Spanish?
From 0 to 30 each number is one word, such as dieciséis or veintitrés. From 31 on it's three words joined by y, such as treinta y uno or noventa y nueve. Then 100 is cien.
When is it cien and when is it ciento?
Cien is exactly 100, and the 100 in front of mil or millones: cien mil, cien millones. Ciento is everything from 101 to 199, as in ciento uno or ciento veinte.
Is it un, uno or una?
Uno when you count, un before a masculine noun and una before a feminine one: veintiuno, veintiún libros, veintiuna páginas. Uno also shortens before mil and millón, so 21,000 is veintiún mil and 31,000,000 is treinta y un millones.
Is a Spanish billón the same as a billion?
No. Spanish uses the long scale. An English billion (1,000,000,000) is mil millones. Un billón is 10 to the power of 12, an English trillion, and un trillón is 10 to the power of 18.
Does it use a decimal point or a decimal comma?
You choose. A toggle switches between coma and punto. Spain and much of South America say coma, so 3,5 is tres coma cinco. Mexico and much of Central America and the Caribbean say punto.
Do accents count in the practice quiz?
Yes. A missing accent is marked wrong, with the note "Almost: check the accents." On-screen buttons type á, é, í, ó and ú. Capital letters don't count, and un, una and uno are all accepted.