Prompt Cost Tool
Prompt Cost Calculator
Estimate how much your prompt costs before you send it.
Last updated: May 2026
Your Inputs
0 characters typed
Approximate tokens expected in the response.
Results
Character count
0
Estimated input tokens
0
Approximation (4 chars/token)
Input cost
$0.000000
GPT-4o
Estimated output cost
$0.0050
500 output tokens
Total estimated cost
$0.0050
Disclaimer:All cost estimates are approximate and based on public API pricing. Actual costs depend on your contract rate, usage patterns, and provider pricing changes. This tool does not constitute financial, legal, tax, or operational advice. Verify pricing with your AI provider's official pricing page.
Assumptions & Limitations
- Character-to-token ratio is approximate (4 chars/token for English; varies by content type).
- Code and technical content may be 2–3 chars/token.
- Multi-modal inputs (images) not modeled.