Converters
Unit converters
Tokens ↔ words ↔ characters ↔ pages ↔ dollars. Every direction, with reference tables and a live two-field converter on each page.
Pages to tokens converter
How many tokens is a 30-page PDF? A 500-page book? Convert document length in pages to an LLM token budget instantly.
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Tokens to dollars converter
Pick a model, enter an input and output token count, see the exact dollar cost. Uses the live Calcis pricing table — no stale rate cards.
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Tokens to API cost calculator
Fine-grained API cost per request. Pick a model, enter tokens, see input cost, output cost, and total — with tokenizer multipliers and long-context tiers applied.
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Words to tokens converter
Convert word counts to LLM token counts. 1 word ≈ 1.33 tokens for English prose. Works for any model family — the ratio is roughly consistent.
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Tokens to words converter
Convert LLM token counts to approximate English word counts. Useful for sizing context windows, estimating output length, or planning document budgets.
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Characters to tokens converter
Convert character counts to approximate LLM token counts. 1 token ≈ 4 characters for English prose.
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