Everyday vocabulary
Danish numbers, and why 50 is halvtreds
Published 19 September 2026
The Danish word for fifty, halvtreds, is short for "half-third times twenty". Above fifty, Danish counts in twenties, and it says the units before the tens all the way up. It sounds like a puzzle, but it is a system, and once you see it the numbers stop being scary. By the end of this page you will be able to read any number up to a thousand.
One to twelve
The first twelve are just words to learn
Numbers are some of the most common words in any language. In the word list behind this site, to [ˈtˢoˀ] "two" is word number 52, ahead of most nouns you can think of.
En or et (one, matching the noun's gender), to [ˈtˢoˀ], tre [ˈtˢʁ̥ɛˀ], fire [fiːrə], fem [ˈfɛmˀ], seks [sɛks], syv [ˈsywˀ], otte [ˈɔːtə], ni [niː], ti [tiːˀ], elleve, tolv.
Listen to to [ˈtˢoˀ], tre [ˈtˢʁ̥ɛˀ] and fem [ˈfɛmˀ] again: all three have stød, the small catch in the voice that Danish spelling never shows. If that is new, here is how stød works and how to hear it.
Thirteen to nineteen end in -ten, like English "-teen": tretten, fjorten, femten, seksten, sytten, atten, nitten.
The tens
From fifty, Danish counts in twenties
Twenty, thirty and forty behave: tyve, tredive, fyrre. Then the system changes. The rest of the tens are multiples of twenty, and the names are shortened versions of old phrases that spelled out the sum.
| Number | Danish | Comes from | The sum |
|---|---|---|---|
| 50 | halvtreds | halvtredsindstyve | 2½ × 20 |
| 60 | tres | tresindstyve | 3 × 20 |
| 70 | halvfjerds | halvfjerdsindstyve | 3½ × 20 |
| 80 | firs | firsindstyve | 4 × 20 |
| 90 | halvfems | halvfemsindstyve | 4½ × 20 |
The odd part is "half-third". In old Danish, halvtredje meant "half of the third one", so two and a half, and the same trick gives halvfjerde (three and a half) and halvfemte (four and a half).
You do not need to do the sum. Danes don't either. They know halvtreds means 50 the way you know "a dozen" means 12. The history is there to make the words feel less arbitrary, not to be worked out at the till.
Building numbers
Units first, then "and", then the tens
Danish says 21 as "one-and-twenty", like the blackbirds in the old English rhyme: enogtyve. Every number from 21 to 99 that is not a round ten works this way, written as one word.
So 57 is "seven-and-fifty", syvoghalvtreds, and 84 is fireogfirs. Listen for the og in the middle: when you hear it, the number you have just heard is the units, and the tens are still coming.
Hundreds and thousands go back to the English order: et hundrede, et tusind, and to hundrede og syvoghalvtreds for 257.
Try it
Read three numbers in thirty seconds
- Say 57: units, og, tens. Syv-og-halvtreds.
- Say 84. Four, and, eighty: fire-og-firs.
- Say 99. Nine, and, ninety: ni-og-halvfems.
Press syvoghalvtreds to check the first one. If you got all three, you can now read every number below a hundred, because there are no more exceptions to learn.
The levels page has whole topics of everyday Danish read aloud, with prices, ages and times in context. Hear numbers in real sentences
In daily life
Prices, years and phone numbers
Prices. Danish swaps the English comma and point. 49,95 kr. is forty-nine kroner ninety-five, and 1.000 kr. is a thousand. Said aloud, the kroner and øre are two separate numbers: niogfyrre femoghalvfems.
Years. Before 2000, years are said in hundreds, as in English: 1975 is nitten hundrede og femoghalvfjerds. From 2000, they are said in full: 2026 is to tusind og seksogtyve.
Phone numbers. Danish numbers have eight digits, and Danes read them in pairs. 12 34 56 78 becomes "twelve, four-and-thirty, six-and-fifty, eight-and-seventy". Ask someone to say a number "one digit at a time" (ét ciffer ad gangen) if the pairs go past too fast. Nobody will mind.
Clock times use the same numbers with a few twists of their own: see how to tell the time in Danish.
Hear the numbers in use
Read and listen to everyday topics on the levels page, or start the word list where numbers first appear.