Direct answer
How Many Tokens Are in a Page of Text?
Approximate tokens per page for English text and how to estimate context-window usage.
Question
How many tokens are in a page of text?
A typical English page of 400 to 500 words is roughly 550 to 700 tokens.
English words per token
about 0.75
400-word page
about 530 tokens
500-word page
about 670 tokens
Explanation
A common rough rule is that 1 token is about 0.75 English words or about 4 characters.
Dense technical text, code, tables, and non-English text can change the ratio.
For long documents, estimate by model family and keep a margin for instructions and output.