Token / API Cost Calculator
Estimate input tokens from text and calculate request cost using the input/output prices you enter. See the formula and its assumptions.
Your result
Fill the fields and run the tool. Your input stays in this browser session.
Ready when you are.
What this tool does
Estimate input tokens from text and calculate request cost using the input/output prices you enter. See the formula and its assumptions.
Example
Example: 4,000 estimated input tokens at $2 per million plus 1,000 output tokens at $8 per million costs about $0.016.
How to use it
Paste a representative input. Enter expected output tokens and the provider’s current prices per million tokens. Compare the estimate with real usage logs.
Useful for
Budgeting batch jobs, comparing prompt lengths and planning a monthly API allowance.
Limitations
The input estimate uses about four characters per token. Real tokenization varies by language, model and content; cached, tool and image tokens are excluded.
FAQ
Are prices updated automatically?
No. Enter the current prices from your provider so the calculation is auditable.
Is the token count exact?
No. Use your provider tokenizer or usage report for exact billing.