Token Estimator
See how much of Claude's context window your content uses
What are tokens?
▼Tokens are chunks of text that AI models process. A token can be a whole word, part of a word, or punctuation. Common words like “the” are one token, while uncommon words get split into pieces. On average, 1 token is roughly 4 characters of English text.
Examples:
Hello
world
— 2 tokens
Merchant
ID
:
452
819
— 5 tokens
Charge
back
Reason
Code
:
10
.
4
— 8 tokens
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.txt
.csv
.md
.pdf
.xlsx
.docx
0
Tokens
0
Characters
0
Words
0
Lines
Context window usage
0 / 1,000,000 tokens (0%)
~200 short email
~5,000 10-page PDF
~200,000 300-page book
~1,000,000 full context window
How much is…?
| A short email | ~200 |
| A 1-page document | ~500 |
| 50-row spreadsheet | ~2,000 |
| 10-page PDF report | ~5,000 |
| 50-page contract | ~25,000 |
| 300-page book | ~200,000 |
| Full context window | 1,000,000 |