AI Cost Lab

The most accurate free AI token & API cost calculator

Step 1 · Estimate from text

Step 2 · Enter exact tokens

Input Tokens

Output Tokens

All calculations happen locally in your browser — nothing is ever uploaded.
Token estimate uses ≈ 4 characters = 1 token (English average). Non-English text (Chinese, Japanese, Korean, etc.) usually consumes significantly more tokens.
Prices are approximate public API rates (October 2026). Always verify with official provider documentation before making production decisions.