It depends on what you mean by fluent, and by word. Paul Nation estimates 8,000–9,000 word families to read novels and 6,000–7,000 to follow speech, if 98% of the words must be familiar. Far fewer take you a long way: about 3,000 families, plus names, cover over 95% of everyday spoken English.
What counts as a word?
Vocabulary figures vary wildly partly because researchers count different things. A small difference in the unit makes a large difference in the total.
| Unit | What it groups together | Spanish example |
|---|---|---|
| Word form | Each spelling counted separately | hablo, hablas and hablaba are three |
| Lemma | A base form with its inflections | hablar covers hablo, hablas, hablaba… |
| Word family | Related lemmas, including derived words | hablar and hablador together |
Most research on learners counts word families, as Paul Nation does. Some studies of native speakers count lemmas. Contos counts word forms: each spelling you have confirmed as known is one word. In a language with as many verb endings as Spanish, that means Contos's totals rise faster than a word-family count would for the same knowledge.
How many words do native speakers know?
Not as many as the size of a dictionary suggests. Nation cites estimates of 114,000 word families in English as a whole, but points out that no native speaker knows them all and that such figures make no sense as a learning goal.
- Around 20,000 word families for well-educated native speakers of English, according to the more conservative studies Nation cites, with a rule of thumb of about 1,000 families a year up to the age of 20.
- About 42,000 lemmas, or roughly 11,100 word families, for an average 20-year-old native speaker of American English, in Brysbaert and colleagues' 2016 estimate. The middle 90% ranged from about 27,000 to 52,000 lemmas.
- About 48,200 lemmas by the age of 60, in the same study: roughly one new lemma every two days through adult life.
Brysbaert's team counted a word as known even if a person only knew that it existed, so the figure measures recognition, not active use. The gap between 11,100 and 20,000 families comes down to method, which is why any single "native speaker number" should be treated with care.
How many words do reading and listening take?
Nation's 2006 study took a more useful approach for learners: instead of asking what natives know, it asked how many word families are needed for 98% of the words in a given kind of text to be familiar, the level he treats as ideal for understanding without help. He used fourteen 1,000-family lists built from the British National Corpus.
| What you want to understand | Word families needed | Coverage reached |
|---|---|---|
| Novels (five classics combined) | 9,000 plus proper nouns | 98.24% |
| Newspapers | at least 8,000 plus proper nouns | 98% |
| A children's film (Shrek) | just over 6,000 | 98% |
| Unscripted conversation and talk radio | 6,000–7,000 | 98% |
| The same speech, at a lower bar | 3,000 plus proper nouns | over 95% |
| A graded reader (The Picture of Dorian Gray, Oxford Bookworms level 3) | 3,000 plus proper nouns | 98.86% |
Two points stand out. Speech draws more heavily on common words than writing does, so listening needs a smaller vocabulary on paper, although Nation notes that the fleeting nature of speech may call for even higher coverage. And a well-made graded reader gets to 98% with a third of the vocabulary that a novel demands, which is the whole case for reading material written for learners. Nation also points out that 98% assumes no dictionary: with help to hand, slightly lower coverage is acceptable.
How do the CEFR levels and Contos's thresholds compare?
Studies that put numbers on the CEFR levels suggest that learners of English need around 2,000 of the 5,000 most frequent words to reach A2, around 3,000 to get past the elementary levels, and 4,000 or more for C1 and C2. Milton notes that the figures differ from one language to another.
Contos moves you up at 500 known words for A2, 1,500 for B1 and 4,000 for B2. Those are counts of word forms confirmed in the app, so they aren't directly comparable with test estimates of word families. What our own text shows is how much work the most common words do at each level:
| Spanish, chapters 1–2 | Different word forms in all | Share of running words made up by the 100 most common | Forms needed to cover 80% of the text |
|---|---|---|---|
| A1 (24 chapters) | 828 | 64% | 229 |
| A2 (24 chapters) | 1,311 | 56% | 373 |
| B1 (22 chapters) | 1,773 | 53% | 546 |
| B2 (24 chapters) | 2,308 | 54% | 647 |
At A1, a couple of hundred forms account for four words in five. By B2 it takes nearly three times as many, and the rest of the text is spread across hundreds of words you will meet only now and then. That long tail is where extra reading and spaced repetition earn their keep, and it is one reason progress can feel slow at the intermediate plateau.
Read a free A1 chapter and count how many of its words you already know.
Read free in your browserFrequently asked questions
Is 1,000 words enough to hold a conversation?
It goes further than you might think. Nation found that the first 1,000 word families plus proper nouns cover around 85% of spoken English, so roughly one word in seven would still be unfamiliar. That is enough for simple exchanges with a patient partner, but not for following a conversation comfortably.
Why do vocabulary estimates disagree so much?
They count different units (word forms, lemmas or word families), test knowledge in different ways and study different languages. Brysbaert's team estimated 42,000 lemmas for a 20-year-old native speaker, which is about 11,100 word families. Other studies Nation cites put educated native speakers at about 20,000 families.
Do I need to know 98% of the words to read?
For unassisted reading, 98% is the usual target. Nation notes it assumes no dictionary or other help, and that slightly lower coverage is acceptable when you have support. Our extensive reading page looks at the studies behind the figure.
Does Contos count word families?
No. Contos counts word forms: each spelling you have marked as known, or whose flashcard has reached the 16-day review step, counts as one word. That is simpler to track inside the app, but it means a Contos total isn't directly comparable with research figures in word families.
Which words should I learn first?
The most frequent ones. In Nation's figures the first 1,000 word families cover 78–81% of written English, and each later thousand adds far less. Reading easy text naturally gives you those common words over and over.